diff --git a/apps/automated/src/ui/core/bindable/bindable-tests.ts b/apps/automated/src/ui/core/bindable/bindable-tests.ts
index 10e6b6edb..c181c868a 100644
--- a/apps/automated/src/ui/core/bindable/bindable-tests.ts
+++ b/apps/automated/src/ui/core/bindable/bindable-tests.ts
@@ -659,17 +659,19 @@ export function test_BindingConverterCalledEvenWithNullValue() {
 	const testPropertyValue = null;
 	const expectedValue = 'collapsed';
 	pageViewModel.set('testProperty', testPropertyValue);
-	appModule.getResources()['converter'] = function (value) {
-		if (value) {
-			return 'visible';
-		} else {
-			return 'collapsed';
-		}
+	appModule.getResources()['converter'] = {
+		toView: function (value) {
+			if (value) {
+				return 'visible';
+			} else {
+				return 'collapsed';
+			}
+		},
 	};
 
 	const testFunc = function (views: Array<View>) {
 		const testLabel = <Label>views[0];
-		testLabel.bind({ sourceProperty: 'testProperty', targetProperty: 'text', expression: 'testProperty | converter' });
+		testLabel.bind({ sourceProperty: 'testProperty', targetProperty: 'text', expression: 'testProperty | converter()' });
 
 		const page = <Page>views[1];
 		page.bindingContext = pageViewModel;
diff --git a/apps/automated/src/ui/list-view/list-view-tests.ts b/apps/automated/src/ui/list-view/list-view-tests.ts
index 4e32eeef0..f5f83dc3d 100644
--- a/apps/automated/src/ui/list-view/list-view-tests.ts
+++ b/apps/automated/src/ui/list-view/list-view-tests.ts
@@ -437,15 +437,17 @@ export class ListViewTest extends UITest<ListView> {
 	public test_usingAppLevelConvertersInListViewItems() {
 		var listView = this.testView;
 
-		var dateConverter = function (value, format) {
-			var result = format;
-			var day = value.getDate();
-			result = result.replace('DD', day < 10 ? '0' + day : day);
-			var month = value.getMonth() + 1;
-			result = result.replace('MM', month < 10 ? '0' + month : month);
-			result = result.replace('YYYY', value.getFullYear());
+		var dateConverter = {
+			toView: function (value, format) {
+				var result = format;
+				var day = value.getDate();
+				result = result.replace('DD', day < 10 ? '0' + day : day);
+				var month = value.getMonth() + 1;
+				result = result.replace('MM', month < 10 ? '0' + month : month);
+				result = result.replace('YYYY', value.getFullYear());
 
-			return result;
+				return result;
+			},
 		};
 
 		Application.getResources()['dateConverter'] = dateConverter;
@@ -565,10 +567,12 @@ export class ListViewTest extends UITest<ListView> {
 		var listView = this.testView;
 		var converterCalledCounter = 0;
 
-		var testConverter = function (value) {
-			converterCalledCounter++;
+		var testConverter = {
+			toView: function (value) {
+				converterCalledCounter++;
 
-			return value;
+				return value;
+			},
 		};
 
 		Application.getResources()['testConverter'] = testConverter;
@@ -578,7 +582,7 @@ export class ListViewTest extends UITest<ListView> {
 		listView.bindingContext = listViewModel;
 
 		listView.bind({ sourceProperty: 'items', targetProperty: 'items' });
-		listView.itemTemplate = '<Label id="testLabel" text="{{ $value, $value | testConverter }}" />';
+		listView.itemTemplate = '<Label id="testLabel" text="{{ $value, $value | testConverter() }}" />';
 
 		this.waitUntilListViewReady();
 
@@ -589,10 +593,12 @@ export class ListViewTest extends UITest<ListView> {
 		var listView = this.testView;
 		var converterCalledCounter = 0;
 
-		var testConverter = function (value) {
-			converterCalledCounter++;
+		var testConverter = {
+			toView: function (value) {
+				converterCalledCounter++;
 
-			return value;
+				return value;
+			},
 		};
 
 		Application.getResources()['testConverter'] = testConverter;
@@ -602,7 +608,7 @@ export class ListViewTest extends UITest<ListView> {
 		listView.bindingContext = listViewModel;
 
 		listView.bind({ sourceProperty: 'items', targetProperty: 'items' });
-		listView.itemTemplate = '<StackLayout><Label id="testLabel" text="{{ $value, $value | testConverter }}" /></StackLayout>';
+		listView.itemTemplate = '<StackLayout><Label id="testLabel" text="{{ $value, $value | testConverter() }}" /></StackLayout>';
 
 		this.waitUntilListViewReady();
 
diff --git a/apps/automated/src/ui/repeater/repeater-tests.ts b/apps/automated/src/ui/repeater/repeater-tests.ts
index 33b47c00e..cfb1a6f91 100644
--- a/apps/automated/src/ui/repeater/repeater-tests.ts
+++ b/apps/automated/src/ui/repeater/repeater-tests.ts
@@ -252,15 +252,17 @@ export function test_splice_observable_array_refreshes_the_Repeater() {
 export function test_usingAppLevelConvertersInRepeaterItems() {
 	var repeater = new Repeater();
 
-	var dateConverter = function (value, format) {
-		var result = format;
-		var day = value.getDate();
-		result = result.replace('DD', month < 10 ? '0' + day : day);
-		var month = value.getMonth() + 1;
-		result = result.replace('MM', month < 10 ? '0' + month : month);
-		result = result.replace('YYYY', value.getFullYear());
+	var dateConverter = {
+		toView: function (value, format) {
+			var result = format;
+			var day = value.getDate();
+			result = result.replace('DD', month < 10 ? '0' + day : day);
+			var month = value.getMonth() + 1;
+			result = result.replace('MM', month < 10 ? '0' + month : month);
+			result = result.replace('YYYY', value.getFullYear());
 
-		return result;
+			return result;
+		},
 	};
 
 	Application.getResources()['dateConverter'] = dateConverter;
@@ -275,7 +277,7 @@ export function test_usingAppLevelConvertersInRepeaterItems() {
 
 		TKUnit.waitUntilReady(() => repeater.isLayoutValid);
 
-		TKUnit.assertEqual(getChildAtText(repeater, 0), dateConverter(new Date(), 'DD.MM.YYYY'), 'element');
+		TKUnit.assertEqual(getChildAtText(repeater, 0), dateConverter.toView(new Date(), 'DD.MM.YYYY'), 'element');
 	}
 
 	helper.buildUIAndRunTest(repeater, testAction);
diff --git a/packages/core/js-libs/esprima/LICENSE.BSD b/packages/core/js-libs/esprima/LICENSE.BSD
deleted file mode 100644
index 3e580c355..000000000
--- a/packages/core/js-libs/esprima/LICENSE.BSD
+++ /dev/null
@@ -1,19 +0,0 @@
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-  * Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-  * Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the
-    documentation and/or other materials provided with the distribution.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
-DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/packages/core/js-libs/esprima/README.md b/packages/core/js-libs/esprima/README.md
deleted file mode 100644
index 0ccc1fa7c..000000000
--- a/packages/core/js-libs/esprima/README.md
+++ /dev/null
@@ -1,24 +0,0 @@
-**Esprima** ([esprima.org](http://esprima.org), BSD license) is a high performance,
-standard-compliant [ECMAScript](http://www.ecma-international.org/publications/standards/Ecma-262.htm)
-parser written in ECMAScript (also popularly known as
-[JavaScript](http://en.wikipedia.org/wiki/JavaScript).
-Esprima is created and maintained by [Ariya Hidayat](http://twitter.com/ariyahidayat),
-with the help of [many contributors](https://github.com/ariya/esprima/contributors).
-
-### Features
-
-- Full support for ECMAScript 5.1 ([ECMA-262](http://www.ecma-international.org/publications/standards/Ecma-262.htm))
-- Sensible [syntax tree format](http://esprima.org/doc/index.html#ast) compatible with Mozilla
-[Parser AST](https://web.archive.org/web/20201119095346/https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Parser_API)
-- Optional tracking of syntax node location (index-based and line-column)
-- Heavily tested (> 700 [unit tests](http://esprima.org/test/) with [full code coverage](http://esprima.org/test/coverage.html))
-- [Partial support](http://esprima.org/doc/es6.html) for ECMAScript 6
-
-Esprima serves as a **building block** for some JavaScript
-language tools, from [code instrumentation](http://esprima.org/demo/functiontrace.html)
-to [editor autocompletion](http://esprima.org/demo/autocomplete.html).
-
-Esprima runs on many popular web browsers, as well as other ECMAScript platforms such as
-[Rhino](https://github.com/mozilla/rhino), [Nashorn](http://openjdk.java.net/projects/nashorn/), and [Node.js](https://npmjs.org/package/esprima).
-
-For more information, check the web site [esprima.org](http://esprima.org).
diff --git a/packages/core/js-libs/esprima/esprima.d.ts b/packages/core/js-libs/esprima/esprima.d.ts
deleted file mode 100644
index 69dffe728..000000000
--- a/packages/core/js-libs/esprima/esprima.d.ts
+++ /dev/null
@@ -1,266 +0,0 @@
-/* tslint:disable */
-
-// Type definitions for Esprima v1.2.0
-// Project: http://esprima.org
-// Definitions by: teppeis <https://github.com/teppeis/>
-// Definitions: https://github.com/borisyankov/DefinitelyTyped
-
-export const version: string;
-export function parse(code: string, options?: Options): Syntax.Program;
-export function tokenize(code: string, options?: Options): Array<Token>;
-
-export interface Token {
-    type: string
-    value: string
-}
-
-export interface Options {
-    loc?: boolean
-    range?: boolean
-    raw?: boolean
-    tokens?: boolean
-    comment?: boolean
-    attachComment?: boolean
-    tolerant?: boolean
-    source?: boolean
-}
-
-export namespace Syntax {
-    // Node
-    interface Node {
-        type: string
-        loc?: LineLocation
-        range?: number[]
-        leadingComments?: Comment[]
-        trailingComments?: Comment[]
-    }
-    interface LineLocation {
-        start: Position
-        end: Position
-    }
-    interface Position {
-        line: number
-        column: number
-    }
-
-    // Comment
-    interface Comment extends Node {
-        value: string
-    }
-
-    // Program
-    interface Program extends Node {
-        body: SomeStatement[]
-        comments?: Comment[]
-    }
-
-    // Function
-    interface Function extends Node {
-        id: Identifier // | null
-        params: Identifier[]
-        defaults: SomeExpression[]
-        rest: Identifier // | null
-        body: BlockStatementOrExpression
-        generator: boolean
-        expression: boolean
-    }
-    interface BlockStatementOrExpression extends Array<SomeStatement>, BlockStatement, SomeExpression {
-        body: BlockStatementOrExpression
-    }
-
-    // Statement
-    type Statement = Node
-    type EmptyStatement = Statement
-    interface BlockStatement extends Statement {
-        body: SomeStatement[]
-    }
-    interface ExpressionStatement extends Statement {
-        expression: SomeExpression
-    }
-    interface IfStatement extends Statement {
-        test: SomeExpression
-        consequent: SomeStatement
-        alternate: SomeStatement
-    }
-    interface LabeledStatement extends Statement {
-        label: Identifier
-        body: SomeStatement
-    }
-    interface BreakStatement extends Statement {
-        label: Identifier // | null
-    }
-    interface ContinueStatement extends Statement {
-        label: Identifier // | null
-    }
-    interface WithStatement extends Statement {
-        object: SomeExpression
-        body: SomeStatement
-    }
-    interface SwitchStatement extends Statement {
-        discriminant: SomeExpression
-        cases: SwitchCase[]
-        lexical: boolean
-    }
-    interface ReturnStatement extends Statement {
-        argument: SomeExpression // | null
-    }
-    interface ThrowStatement extends Statement {
-        argument: SomeExpression
-    }
-    interface TryStatement extends Statement {
-        block: BlockStatement
-        handler: CatchClause // | null
-        guardedHandlers: CatchClause[]
-        finalizer: BlockStatement // | null
-    }
-    interface WhileStatement extends Statement {
-        test: SomeExpression
-        body: SomeStatement
-    }
-    interface DoWhileStatement extends Statement {
-        body: SomeStatement
-        test: SomeExpression
-    }
-    interface ForStatement extends Statement {
-        init: VariableDeclaratorOrExpression // | null
-        test: SomeExpression // | null
-        update: SomeExpression // | null
-        body: SomeStatement
-    }
-    interface ForInStatement extends Statement {
-        left: VariableDeclaratorOrExpression
-        right: SomeExpression
-        body: SomeStatement
-        each: boolean
-    }
-    interface VariableDeclaratorOrExpression extends VariableDeclarator, SomeExpression {
-    }
-    type DebuggerStatement = Statement
-    interface SomeStatement extends
-        EmptyStatement, ExpressionStatement, BlockStatement, IfStatement,
-        LabeledStatement, BreakStatement, ContinueStatement, WithStatement,
-        SwitchStatement, ReturnStatement, ThrowStatement, TryStatement,
-        WhileStatement, DoWhileStatement, ForStatement, ForInStatement, DebuggerStatement {
-        body: SomeStatementOrList
-    }
-    interface SomeStatementOrList extends Array<SomeStatement>, SomeStatement {
-    }
-
-    // Declration
-    type Declration = Statement
-    interface FunctionDeclration extends Declration {
-        id: Identifier
-        params: Identifier[] // Pattern
-        defaults: SomeExpression[]
-        rest: Identifier
-        body: BlockStatementOrExpression
-        generator: boolean
-        expression: boolean
-    }
-    interface VariableDeclaration extends Declration {
-        declarations: VariableDeclarator[]
-        kind: string // "var" | "let" | "const"
-    }
-    interface VariableDeclarator extends Node {
-        id: Identifier // Pattern
-        init: SomeExpression
-    }
-
-    // Expression
-    type Expression = Node
-    interface SomeExpression extends
-        ThisExpression, ArrayExpression, ObjectExpression, FunctionExpression,
-        ArrowFunctionExpression, SequenceExpression, UnaryExpression, BinaryExpression,
-        AssignmentExpression, UpdateExpression, LogicalExpression, ConditionalExpression,
-        NewExpression, CallExpression, MemberExpression {
-    }
-    type ThisExpression = Expression
-    interface ArrayExpression extends Expression {
-        elements: SomeExpression[] // [ Expression | null ]
-    }
-    interface ObjectExpression extends Expression {
-        properties: Property[]
-    }
-    interface Property extends Node {
-        key: LiteralOrIdentifier // Literal | Identifier
-        value: SomeExpression
-        kind: string // "init" | "get" | "set"
-    }
-    interface LiteralOrIdentifier extends Literal, Identifier {
-    }
-    interface FunctionExpression extends Function, Expression {
-    }
-    interface ArrowFunctionExpression extends Function, Expression {
-    }
-    interface SequenceExpression extends Expression {
-        expressions: SomeExpression[]
-    }
-    interface UnaryExpression extends Expression {
-        operator: string // UnaryOperator
-        prefix: boolean
-        argument: SomeExpression
-    }
-    interface BinaryExpression extends Expression {
-        operator: string // BinaryOperator
-        left: SomeExpression
-        right: SomeExpression
-    }
-    interface AssignmentExpression extends Expression {
-        operator: string // AssignmentOperator
-        left: SomeExpression
-        right: SomeExpression
-    }
-    interface UpdateExpression extends Expression {
-        operator: string // UpdateOperator
-        argument: SomeExpression
-        prefix: boolean
-    }
-    interface LogicalExpression extends Expression {
-        operator: string // LogicalOperator
-        left: SomeExpression
-        right: SomeExpression
-    }
-    interface ConditionalExpression extends Expression {
-        test: SomeExpression
-        alternate: SomeExpression
-        consequent: SomeExpression
-    }
-    interface NewExpression extends Expression {
-        callee: SomeExpression
-        arguments: SomeExpression[]
-    }
-    interface CallExpression extends Expression {
-        callee: SomeExpression
-        arguments: SomeExpression[]
-    }
-    interface MemberExpression extends Expression {
-        object: SomeExpression
-        property: IdentifierOrExpression // Identifier | Expression
-        computed: boolean
-    }
-    interface IdentifierOrExpression extends Identifier, SomeExpression {
-    }
-
-    // Pattern
-    // interface Pattern extends Node {
-    // }
-
-    // Clauses
-    interface SwitchCase extends Node {
-        test: SomeExpression
-        consequent: SomeStatement[]
-    }
-    interface CatchClause extends Node {
-        param: Identifier // Pattern
-        guard: SomeExpression
-        body: BlockStatement
-    }
-
-    // Misc
-    interface Identifier extends Node, Expression { // | Pattern
-        name: string
-    }
-    interface Literal extends Node, Expression {
-        value: any // string | boolean | null | number | RegExp
-    }
-}
diff --git a/packages/core/js-libs/esprima/esprima.js b/packages/core/js-libs/esprima/esprima.js
deleted file mode 100644
index d509cff06..000000000
--- a/packages/core/js-libs/esprima/esprima.js
+++ /dev/null
@@ -1,1042 +0,0 @@
-/*
-  Copyright (C) 2013 Ariya Hidayat <ariya.hidayat@gmail.com>
-  Copyright (C) 2013 Thaddee Tyl <thaddee.tyl@gmail.com>
-  Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com>
-  Copyright (C) 2012 Mathias Bynens <mathias@qiwi.be>
-  Copyright (C) 2012 Joost-Wim Boekesteijn <joost-wim@boekesteijn.nl>
-  Copyright (C) 2012 Kris Kowal <kris.kowal@cixar.com>
-  Copyright (C) 2012 Yusuke Suzuki <utatane.tea@gmail.com>
-  Copyright (C) 2012 Arpad Borsos <arpad.borsos@googlemail.com>
-  Copyright (C) 2011 Ariya Hidayat <ariya.hidayat@gmail.com>
-
-  Redistribution and use in source and binary forms, with or without
-  modification, are permitted provided that the following conditions are met:
-
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above copyright
-      notice, this list of conditions and the following disclaimer in the
-      documentation and/or other materials provided with the distribution.
-
-  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
-  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-(function (global) {
-    'use strict';
-
-    var Token,
-        TokenName,
-        Syntax,
-        Messages,
-        source,
-        index,
-        length,
-        delegate,
-        lookahead,
-        state;
-
-    Token = {
-        BooleanLiteral: 1,
-        EOF: 2,
-        Identifier: 3,
-        Keyword: 4,
-        NullLiteral: 5,
-        NumericLiteral: 6,
-        Punctuator: 7,
-        StringLiteral: 8
-    };
-
-    TokenName = {};
-    TokenName[Token.BooleanLiteral] = 'Boolean';
-    TokenName[Token.EOF] = '<end>';
-    TokenName[Token.Identifier] = 'Identifier';
-    TokenName[Token.Keyword] = 'Keyword';
-    TokenName[Token.NullLiteral] = 'Null';
-    TokenName[Token.NumericLiteral] = 'Numeric';
-    TokenName[Token.Punctuator] = 'Punctuator';
-    TokenName[Token.StringLiteral] = 'String';
-
-    Syntax = {
-        ArrayExpression: 'ArrayExpression',
-        BinaryExpression: 'BinaryExpression',
-        CallExpression: 'CallExpression',
-        ConditionalExpression: 'ConditionalExpression',
-        EmptyStatement: 'EmptyStatement',
-        ExpressionStatement: 'ExpressionStatement',
-        Identifier: 'Identifier',
-        Literal: 'Literal',
-        LabeledStatement: 'LabeledStatement',
-        LogicalExpression: 'LogicalExpression',
-        MemberExpression: 'MemberExpression',
-        ObjectExpression: 'ObjectExpression',
-        Program: 'Program',
-        Property: 'Property',
-        ThisExpression: 'ThisExpression',
-        UnaryExpression: 'UnaryExpression'
-    };
-
-    // Error messages should be identical to V8.
-    Messages = {
-        UnexpectedToken: 'Unexpected token %0',
-        UnknownLabel: 'Undefined label \'%0\'',
-        Redeclaration: '%0 \'%1\' has already been declared'
-    };
-
-    // Ensure the condition is true, otherwise throw an error.
-    // This is only to have a better contract semantic, i.e. another safety net
-    // to catch a logic error. The condition shall be fulfilled in normal case.
-    // Do NOT use this to enforce a certain condition on any user input.
-
-    function assert(condition, message) {
-        if (!condition) {
-            throw new Error('ASSERT: ' + message);
-        }
-    }
-
-    function isDecimalDigit(ch) {
-        return (ch >= 48 && ch <= 57);   // 0..9
-    }
-
-
-    // 7.2 White Space
-
-    function isWhiteSpace(ch) {
-        return (ch === 32) ||  // space
-            (ch === 9) ||      // tab
-            (ch === 0xB) ||
-            (ch === 0xC) ||
-            (ch === 0xA0) ||
-            (ch >= 0x1680 && '\u1680\u180E\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\uFEFF'.indexOf(String.fromCharCode(ch)) > 0);
-    }
-
-    // 7.3 Line Terminators
-
-    function isLineTerminator(ch) {
-        return (ch === 10) || (ch === 13) || (ch === 0x2028) || (ch === 0x2029);
-    }
-
-    // 7.6 Identifier Names and Identifiers
-
-    function isIdentifierStart(ch) {
-        return (ch === 36) || (ch === 95) ||  // $ (dollar) and _ (underscore)
-            (ch >= 65 && ch <= 90) ||         // A..Z
-            (ch >= 97 && ch <= 122);          // a..z
-    }
-
-    function isIdentifierPart(ch) {
-        return (ch === 36) || (ch === 95) ||  // $ (dollar) and _ (underscore)
-            (ch >= 65 && ch <= 90) ||         // A..Z
-            (ch >= 97 && ch <= 122) ||        // a..z
-            (ch >= 48 && ch <= 57);           // 0..9
-    }
-
-    // 7.6.1.1 Keywords
-
-    function isKeyword(id) {
-        return (id === 'this')
-    }
-
-    // 7.4 Comments
-
-    function skipWhitespace() {
-        while (index < length && isWhiteSpace(source.charCodeAt(index))) {
-            ++index;
-        }
-    }
-
-    function getIdentifier() {
-        var start, ch;
-
-        start = index++;
-        while (index < length) {
-            ch = source.charCodeAt(index);
-            if (isIdentifierPart(ch)) {
-                ++index;
-            } else {
-                break;
-            }
-        }
-
-        return source.slice(start, index);
-    }
-
-    function scanIdentifier() {
-        var start, id, type;
-
-        start = index;
-
-        id = getIdentifier();
-
-        // There is no keyword or literal with only one character.
-        // Thus, it must be an identifier.
-        if (id.length === 1) {
-            type = Token.Identifier;
-        } else if (isKeyword(id)) {
-            type = Token.Keyword;
-        } else if (id === 'null') {
-            type = Token.NullLiteral;
-        } else if (id === 'true' || id === 'false') {
-            type = Token.BooleanLiteral;
-        } else {
-            type = Token.Identifier;
-        }
-
-        return {
-            type: type,
-            value: id,
-            range: [start, index]
-        };
-    }
-
-
-    // 7.7 Punctuators
-
-    function scanPunctuator() {
-        var start = index,
-            code = source.charCodeAt(index),
-            code2,
-            ch1 = source[index],
-            ch2;
-
-        switch (code) {
-
-            // Check for most common single-character punctuators.
-            case 46:   // . dot
-            case 40:   // ( open bracket
-            case 41:   // ) close bracket
-            case 59:   // ; semicolon
-            case 44:   // , comma
-            case 123:  // { open curly brace
-            case 125:  // } close curly brace
-            case 91:   // [
-            case 93:   // ]
-            case 58:   // :
-            case 63:   // ?
-                ++index;
-                return {
-                    type: Token.Punctuator,
-                    value: String.fromCharCode(code),
-                    range: [start, index]
-                };
-
-            default:
-                code2 = source.charCodeAt(index + 1);
-
-                // '=' (char #61) marks an assignment or comparison operator.
-                if (code2 === 61) {
-                    switch (code) {
-                        case 37:  // %
-                        case 38:  // &
-                        case 42:  // *:
-                        case 43:  // +
-                        case 45:  // -
-                        case 47:  // /
-                        case 60:  // <
-                        case 62:  // >
-                        case 124: // |
-                            index += 2;
-                            return {
-                                type: Token.Punctuator,
-                                value: String.fromCharCode(code) + String.fromCharCode(code2),
-                                range: [start, index]
-                            };
-
-                        case 33: // !
-                        case 61: // =
-                            index += 2;
-
-                            // !== and ===
-                            if (source.charCodeAt(index) === 61) {
-                                ++index;
-                            }
-                            return {
-                                type: Token.Punctuator,
-                                value: source.slice(start, index),
-                                range: [start, index]
-                            };
-                        default:
-                            break;
-                    }
-                }
-                break;
-        }
-
-        // Peek more characters.
-
-        ch2 = source[index + 1];
-
-        // Other 2-character punctuators: && ||
-
-        if (ch1 === ch2 && ('&|'.indexOf(ch1) >= 0)) {
-            index += 2;
-            return {
-                type: Token.Punctuator,
-                value: ch1 + ch2,
-                range: [start, index]
-            };
-        }
-
-        if ('<>=!+-*%&|^/'.indexOf(ch1) >= 0) {
-            ++index;
-            return {
-                type: Token.Punctuator,
-                value: ch1,
-                range: [start, index]
-            };
-        }
-
-        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
-    }
-
-    // 7.8.3 Numeric Literals
-    function scanNumericLiteral() {
-        var number, start, ch;
-
-        ch = source[index];
-        assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'),
-            'Numeric literal must start with a decimal digit or a decimal point');
-
-        start = index;
-        number = '';
-        if (ch !== '.') {
-            number = source[index++];
-            ch = source[index];
-
-            // Hex number starts with '0x'.
-            // Octal number starts with '0'.
-            if (number === '0') {
-                // decimal number starts with '0' such as '09' is illegal.
-                if (ch && isDecimalDigit(ch.charCodeAt(0))) {
-                    throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
-                }
-            }
-
-            while (isDecimalDigit(source.charCodeAt(index))) {
-                number += source[index++];
-            }
-            ch = source[index];
-        }
-
-        if (ch === '.') {
-            number += source[index++];
-            while (isDecimalDigit(source.charCodeAt(index))) {
-                number += source[index++];
-            }
-            ch = source[index];
-        }
-
-        if (ch === 'e' || ch === 'E') {
-            number += source[index++];
-
-            ch = source[index];
-            if (ch === '+' || ch === '-') {
-                number += source[index++];
-            }
-            if (isDecimalDigit(source.charCodeAt(index))) {
-                while (isDecimalDigit(source.charCodeAt(index))) {
-                    number += source[index++];
-                }
-            } else {
-                throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
-            }
-        }
-
-        if (isIdentifierStart(source.charCodeAt(index))) {
-            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
-        }
-
-        return {
-            type: Token.NumericLiteral,
-            value: parseFloat(number),
-            range: [start, index]
-        };
-    }
-
-    // 7.8.4 String Literals
-
-    function scanStringLiteral() {
-        var str = '', quote, start, ch, octal = false;
-
-        quote = source[index];
-        assert((quote === '\'' || quote === '"'),
-            'String literal must starts with a quote');
-
-        start = index;
-        ++index;
-
-        while (index < length) {
-            ch = source[index++];
-
-            if (ch === quote) {
-                quote = '';
-                break;
-            } else if (ch === '\\') {
-                ch = source[index++];
-                if (!ch || !isLineTerminator(ch.charCodeAt(0))) {
-                    switch (ch) {
-                        case 'n':
-                            str += '\n';
-                            break;
-                        case 'r':
-                            str += '\r';
-                            break;
-                        case 't':
-                            str += '\t';
-                            break;
-                        case 'b':
-                            str += '\b';
-                            break;
-                        case 'f':
-                            str += '\f';
-                            break;
-                        case 'v':
-                            str += '\x0B';
-                            break;
-
-                        default:
-                            str += ch;
-                            break;
-                    }
-                } else {
-                    if (ch === '\r' && source[index] === '\n') {
-                        ++index;
-                    }
-                }
-            } else if (isLineTerminator(ch.charCodeAt(0))) {
-                break;
-            } else {
-                str += ch;
-            }
-        }
-
-        if (quote !== '') {
-            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
-        }
-
-        return {
-            type: Token.StringLiteral,
-            value: str,
-            octal: octal,
-            range: [start, index]
-        };
-    }
-
-    function isIdentifierName(token) {
-        return token.type === Token.Identifier ||
-            token.type === Token.Keyword ||
-            token.type === Token.BooleanLiteral ||
-            token.type === Token.NullLiteral;
-    }
-
-    function advance() {
-        var ch;
-
-        skipWhitespace();
-
-        if (index >= length) {
-            return {
-                type: Token.EOF,
-                range: [index, index]
-            };
-        }
-
-        ch = source.charCodeAt(index);
-
-        // Very common: ( and ) and ;
-        if (ch === 40 || ch === 41 || ch === 58) {
-            return scanPunctuator();
-        }
-
-        // String literal starts with single quote (#39) or double quote (#34).
-        if (ch === 39 || ch === 34) {
-            return scanStringLiteral();
-        }
-
-        if (isIdentifierStart(ch)) {
-            return scanIdentifier();
-        }
-
-        // Dot (.) char #46 can also start a floating-point number, hence the need
-        // to check the next character.
-        if (ch === 46) {
-            if (isDecimalDigit(source.charCodeAt(index + 1))) {
-                return scanNumericLiteral();
-            }
-            return scanPunctuator();
-        }
-
-        if (isDecimalDigit(ch)) {
-            return scanNumericLiteral();
-        }
-
-        return scanPunctuator();
-    }
-
-    function lex() {
-        var token;
-
-        token = lookahead;
-        index = token.range[1];
-
-        lookahead = advance();
-
-        index = token.range[1];
-
-        return token;
-    }
-
-    function peek() {
-        var pos;
-
-        pos = index;
-        lookahead = advance();
-        index = pos;
-    }
-
-    // Throw an exception
-
-    function throwError(token, messageFormat) {
-        var error,
-            args = Array.prototype.slice.call(arguments, 2),
-            msg = messageFormat.replace(
-                /%(\d)/g,
-                function (whole, index) {
-                    assert(index < args.length, 'Message reference must be in range');
-                    return args[index];
-                }
-            );
-
-        error = new Error(msg);
-        error.index = index;
-        error.description = msg;
-        throw error;
-    }
-
-    // Throw an exception because of the token.
-
-    function throwUnexpected(token) {
-        throwError(token, Messages.UnexpectedToken, token.value);
-    }
-
-    // Expect the next token to match the specified punctuator.
-    // If not, an exception will be thrown.
-
-    function expect(value) {
-        var token = lex();
-        if (token.type !== Token.Punctuator || token.value !== value) {
-            throwUnexpected(token);
-        }
-    }
-
-    // Return true if the next token matches the specified punctuator.
-
-    function match(value) {
-        return lookahead.type === Token.Punctuator && lookahead.value === value;
-    }
-
-    // Return true if the next token matches the specified keyword
-
-    function matchKeyword(keyword) {
-        return lookahead.type === Token.Keyword && lookahead.value === keyword;
-    }
-
-    function consumeSemicolon() {
-        // Catch the very common case first: immediately a semicolon (char #59).
-        if (source.charCodeAt(index) === 59) {
-            lex();
-            return;
-        }
-
-        skipWhitespace();
-
-        if (match(';')) {
-            lex();
-            return;
-        }
-
-        if (lookahead.type !== Token.EOF && !match('}')) {
-            throwUnexpected(lookahead);
-        }
-    }
-
-    // 11.1.4 Array Initialiser
-
-    function parseArrayInitialiser() {
-        var elements = [];
-
-        expect('[');
-
-        while (!match(']')) {
-            if (match(',')) {
-                lex();
-                elements.push(null);
-            } else {
-                elements.push(parseExpression());
-
-                if (!match(']')) {
-                    expect(',');
-                }
-            }
-        }
-
-        expect(']');
-
-        return delegate.createArrayExpression(elements);
-    }
-
-    // 11.1.5 Object Initialiser
-
-    function parseObjectPropertyKey() {
-        var token;
-
-        skipWhitespace();
-        token = lex();
-
-        // Note: This function is called only from parseObjectProperty(), where
-        // EOF and Punctuator tokens are already filtered out.
-        if (token.type === Token.StringLiteral || token.type === Token.NumericLiteral) {
-            return delegate.createLiteral(token);
-        }
-
-        return delegate.createIdentifier(token.value);
-    }
-
-    function parseObjectProperty() {
-        var token, key;
-
-        token = lookahead;
-        skipWhitespace();
-
-        if (token.type === Token.EOF || token.type === Token.Punctuator) {
-            throwUnexpected(token);
-        }
-
-        key = parseObjectPropertyKey();
-        expect(':');
-        return delegate.createProperty('init', key, parseExpression());
-    }
-
-    function parseObjectInitialiser() {
-        var properties = [];
-
-        expect('{');
-
-        while (!match('}')) {
-            properties.push(parseObjectProperty());
-
-            if (!match('}')) {
-                expect(',');
-            }
-        }
-
-        expect('}');
-
-        return delegate.createObjectExpression(properties);
-    }
-
-    // 11.1.6 The Grouping Operator
-
-    function parseGroupExpression() {
-        var expr;
-
-        expect('(');
-
-        expr = parseExpression();
-
-        expect(')');
-
-        return expr;
-    }
-
-
-    // 11.1 Primary Expressions
-
-    function parsePrimaryExpression() {
-        var type, token, expr;
-
-        if (match('(')) {
-            return parseGroupExpression();
-        }
-
-        type = lookahead.type;
-
-        if (type === Token.Identifier) {
-            expr = delegate.createIdentifier(lex().value);
-        } else if (type === Token.StringLiteral || type === Token.NumericLiteral) {
-            expr = delegate.createLiteral(lex());
-        } else if (type === Token.Keyword) {
-            if (matchKeyword('this')) {
-                lex();
-                expr = delegate.createThisExpression();
-            }
-        } else if (type === Token.BooleanLiteral) {
-            token = lex();
-            token.value = (token.value === 'true');
-            expr = delegate.createLiteral(token);
-        } else if (type === Token.NullLiteral) {
-            token = lex();
-            token.value = null;
-            expr = delegate.createLiteral(token);
-        } else if (match('[')) {
-            expr = parseArrayInitialiser();
-        } else if (match('{')) {
-            expr = parseObjectInitialiser();
-        }
-
-        if (expr) {
-            return expr;
-        }
-
-        throwUnexpected(lex());
-    }
-
-    // 11.2 Left-Hand-Side Expressions
-
-    function parseArguments() {
-        var args = [];
-
-        expect('(');
-
-        if (!match(')')) {
-            while (index < length) {
-                args.push(parseExpression());
-                if (match(')')) {
-                    break;
-                }
-                expect(',');
-            }
-        }
-
-        expect(')');
-
-        return args;
-    }
-
-    function parseNonComputedProperty() {
-        var token;
-
-        token = lex();
-
-        if (!isIdentifierName(token)) {
-            throwUnexpected(token);
-        }
-
-        return delegate.createIdentifier(token.value);
-    }
-
-    function parseNonComputedMember() {
-        expect('.');
-
-        return parseNonComputedProperty();
-    }
-
-    function parseComputedMember() {
-        var expr;
-
-        expect('[');
-
-        expr = parseExpression();
-
-        expect(']');
-
-        return expr;
-    }
-
-    function parseLeftHandSideExpression() {
-        var expr, args, property;
-
-        expr = parsePrimaryExpression();
-
-        while (true) {
-            if (match('[')) {
-                property = parseComputedMember();
-                expr = delegate.createMemberExpression('[', expr, property);
-            } else if (match('.')) {
-                property = parseNonComputedMember();
-                expr = delegate.createMemberExpression('.', expr, property);
-            } else if (match('(')) {
-                args = parseArguments();
-                expr = delegate.createCallExpression(expr, args);
-            } else {
-                break;
-            }
-        }
-
-        return expr;
-    }
-
-    // 11.3 Postfix Expressions
-
-    var parsePostfixExpression = parseLeftHandSideExpression;
-
-    // 11.4 Unary Operators
-
-    function parseUnaryExpression() {
-        var token, expr;
-
-        if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) {
-            expr = parsePostfixExpression();
-        } else if (match('+') || match('-') || match('!')) {
-            token = lex();
-            expr = parseUnaryExpression();
-            expr = delegate.createUnaryExpression(token.value, expr);
-        } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {
-            throwError({}, Messages.UnexpectedToken);
-        } else {
-            expr = parsePostfixExpression();
-        }
-
-        return expr;
-    }
-
-    function binaryPrecedence(token) {
-        var prec = 0;
-
-        if (token.type !== Token.Punctuator && token.type !== Token.Keyword) {
-            return 0;
-        }
-
-        switch (token.value) {
-            case '||':
-                prec = 1;
-                break;
-
-            case '&&':
-                prec = 2;
-                break;
-
-            case '==':
-            case '!=':
-            case '===':
-            case '!==':
-                prec = 6;
-                break;
-
-            case '<':
-            case '>':
-            case '<=':
-            case '>=':
-            case 'instanceof':
-                prec = 7;
-                break;
-
-            case 'in':
-                prec = 7;
-                break;
-
-            case '+':
-            case '-':
-                prec = 9;
-                break;
-
-            case '*':
-            case '/':
-            case '%':
-                prec = 11;
-                break;
-
-            default:
-                break;
-        }
-
-        return prec;
-    }
-
-    // 11.5 Multiplicative Operators
-    // 11.6 Additive Operators
-    // 11.7 Bitwise Shift Operators
-    // 11.8 Relational Operators
-    // 11.9 Equality Operators
-    // 11.10 Binary Bitwise Operators
-    // 11.11 Binary Logical Operators
-
-    function parseBinaryExpression() {
-        var expr, token, prec, stack, right, operator, left, i;
-
-        left = parseUnaryExpression();
-
-        token = lookahead;
-        prec = binaryPrecedence(token);
-        if (prec === 0) {
-            return left;
-        }
-        token.prec = prec;
-        lex();
-
-        right = parseUnaryExpression();
-
-        stack = [left, token, right];
-
-        while ((prec = binaryPrecedence(lookahead)) > 0) {
-
-            // Reduce: make a binary expression from the three topmost entries.
-            while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) {
-                right = stack.pop();
-                operator = stack.pop().value;
-                left = stack.pop();
-                expr = delegate.createBinaryExpression(operator, left, right);
-                stack.push(expr);
-            }
-
-            // Shift.
-            token = lex();
-            token.prec = prec;
-            stack.push(token);
-            expr = parseUnaryExpression();
-            stack.push(expr);
-        }
-
-        // Final reduce to clean-up the stack.
-        i = stack.length - 1;
-        expr = stack[i];
-        while (i > 1) {
-            expr = delegate.createBinaryExpression(stack[i - 1].value, stack[i - 2], expr);
-            i -= 2;
-        }
-
-        return expr;
-    }
-
-
-    // 11.12 Conditional Operator
-
-    function parseConditionalExpression() {
-        var expr, consequent, alternate;
-
-        expr = parseBinaryExpression();
-
-        if (match('?')) {
-            lex();
-            consequent = parseConditionalExpression();
-            expect(':');
-            alternate = parseConditionalExpression();
-
-            expr = delegate.createConditionalExpression(expr, consequent, alternate);
-        }
-
-        return expr;
-    }
-
-    // Simplification since we do not support AssignmentExpression.
-    var parseExpression = parseConditionalExpression;
-
-    // Polymer Syntax extensions
-
-    // Filter ::
-    //   Identifier
-    //   Identifier "(" ")"
-    //   Identifier "(" FilterArguments ")"
-
-    function parseFilter() {
-        var identifier, args;
-
-        identifier = lex();
-
-        if (identifier.type !== Token.Identifier) {
-            throwUnexpected(identifier);
-        }
-
-        args = match('(') ? parseArguments() : [];
-
-        return delegate.createFilter(identifier.value, args);
-    }
-
-    // Filters ::
-    //   "|" Filter
-    //   Filters "|" Filter
-
-    function parseFilters() {
-        while (match('|')) {
-            lex();
-            parseFilter();
-        }
-    }
-
-    // TopLevel ::
-    //   LabelledExpressions
-    //   AsExpression
-    //   InExpression
-    //   FilterExpression
-
-    // AsExpression ::
-    //   FilterExpression as Identifier
-
-    // InExpression ::
-    //   Identifier, Identifier in FilterExpression
-    //   Identifier in FilterExpression
-
-    // FilterExpression ::
-    //   Expression
-    //   Expression Filters
-
-    function parseTopLevel() {
-        skipWhitespace();
-        peek();
-
-        var expr = parseExpression();
-        if (expr) {
-            if (lookahead.value === ',' || lookahead.value == 'in' &&
-                       expr.type === Syntax.Identifier) {
-                parseInExpression(expr);
-            } else {
-                parseFilters();
-                if (lookahead.value === 'as') {
-                    parseAsExpression(expr);
-                } else {
-                    delegate.createTopLevel(expr);
-                }
-            }
-        }
-
-        if (lookahead.type !== Token.EOF) {
-            throwUnexpected(lookahead);
-        }
-    }
-
-    function parseAsExpression(expr) {
-        lex();  // as
-        var identifier = lex().value;
-        delegate.createAsExpression(expr, identifier);
-    }
-
-    function parseInExpression(identifier) {
-        var indexName;
-        if (lookahead.value === ',') {
-            lex();
-            if (lookahead.type !== Token.Identifier)
-                throwUnexpected(lookahead);
-            indexName = lex().value;
-        }
-
-        lex();  // in
-        var expr = parseExpression();
-        parseFilters();
-        delegate.createInExpression(identifier.name, indexName, expr);
-    }
-
-    function parse(code, inDelegate) {
-        delegate = inDelegate;
-        source = code;
-        index = 0;
-        length = source.length;
-        lookahead = null;
-        state = {
-            labelSet: {}
-        };
-
-        return parseTopLevel();
-    }
-
-    global.esprima = {
-        parse: parse
-    };
-})(module.exports);
\ No newline at end of file
diff --git a/packages/core/js-libs/esprima/package.json b/packages/core/js-libs/esprima/package.json
deleted file mode 100644
index 3ee3e4bd7..000000000
--- a/packages/core/js-libs/esprima/package.json
+++ /dev/null
@@ -1,75 +0,0 @@
-{
-    "name": "esprima",
-    "description": "ECMAScript parsing infrastructure for multipurpose analysis",
-    "homepage": "http://esprima.org",
-    "main": "esprima",
-    "sideEffects": false,
-    "types": "esprima.d.ts",
-    "bin": {
-        "esparse": "./bin/esparse.js",
-        "esvalidate": "./bin/esvalidate.js"
-    },
-    "version": "2.0.0-dev",
-    "engines": {
-        "node": ">=0.4.0"
-    },
-    "author": {
-        "name": "Ariya Hidayat",
-        "email": "ariya.hidayat@gmail.com"
-    },
-    "maintainers": [
-        {
-            "name": "Ariya Hidayat",
-            "email": "ariya.hidayat@gmail.com",
-            "web": "http://ariya.ofilabs.com"
-        }
-    ],
-    "repository": {
-        "type": "git",
-        "url": "https://github.com/ariya/esprima.git"
-    },
-    "bugs": {
-        "url": "http://issues.esprima.org"
-    },
-    "licenses": [
-        {
-            "type": "BSD",
-            "url": "https://github.com/ariya/esprima/raw/master/LICENSE.BSD"
-        }
-    ],
-    "devDependencies": {
-        "jslint": "~0.1.9",
-        "eslint": "~5.16.0",
-        "jscs": "~1.2.4",
-        "istanbul": "~0.2.6",
-        "complexity-report": "~0.6.1",
-        "regenerate": "~0.6.2",
-        "unicode-7.0.0": "~0.1.5",
-        "json-diff": "~0.3.1",
-        "optimist": "~0.6.0"
-    },
-    "keywords": [
-        "ast",
-        "ecmascript",
-        "javascript",
-        "parser",
-        "syntax"
-    ],
-    "scripts": {
-        "generate-regex": "node tools/generate-identifier-regex.js",
-        "test": "npm run-script lint && node test/run.js && npm run-script coverage && npm run-script complexity",
-        "lint": "npm run-script check-version && npm run-script eslint && npm run-script jscs && npm run-script jslint",
-        "check-version": "node tools/check-version.js",
-        "eslint": "node node_modules/eslint/bin/eslint.js esprima.js",
-        "jscs": "node node_modules/jscs/bin/jscs esprima.js",
-        "jslint": "node node_modules/jslint/bin/jslint.js esprima.js",
-        "coverage": "npm run-script analyze-coverage && npm run-script check-coverage",
-        "analyze-coverage": "node node_modules/istanbul/lib/cli.js cover test/runner.js",
-        "check-coverage": "node node_modules/istanbul/lib/cli.js check-coverage --statement 100 --branch 100 --function 100",
-        "complexity": "npm run-script analyze-complexity && npm run-script check-complexity",
-        "analyze-complexity": "node tools/list-complexity.js",
-        "check-complexity": "node node_modules/complexity-report/src/cli.js --maxcc 15 --silent -l -w esprima.js",
-        "benchmark": "node test/benchmarks.js",
-        "benchmark-quick": "node test/benchmarks.js quick"
-    }
-}
diff --git a/packages/core/js-libs/polymer-expressions/LICENSE b/packages/core/js-libs/polymer-expressions/LICENSE
deleted file mode 100644
index 95987bac8..000000000
--- a/packages/core/js-libs/polymer-expressions/LICENSE
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright (c) 2014 The Polymer Authors. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//    * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//    * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//    * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/packages/core/js-libs/polymer-expressions/README.md b/packages/core/js-libs/polymer-expressions/README.md
deleted file mode 100644
index e69de29bb..000000000
diff --git a/packages/core/js-libs/polymer-expressions/package.json b/packages/core/js-libs/polymer-expressions/package.json
deleted file mode 100644
index 099137b47..000000000
--- a/packages/core/js-libs/polymer-expressions/package.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "sideEffects": false,
-  "name": "polymer-expressions",
-  "main": "polymer-expressions",
-  "types": "polymer-expressions.d.ts"
-}
diff --git a/packages/core/js-libs/polymer-expressions/path-parser.js b/packages/core/js-libs/polymer-expressions/path-parser.js
deleted file mode 100644
index dbcd32ba1..000000000
--- a/packages/core/js-libs/polymer-expressions/path-parser.js
+++ /dev/null
@@ -1,393 +0,0 @@
-/*
- * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
- * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
- * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
- * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
- * Code distributed by Google as part of the polymer project is also
- * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
- */
-
-'use strict';
-
-function detectEval() {
-    // Don't test for eval if we're running in a Chrome App environment.
-    // We check for APIs set that only exist in a Chrome App context.
-    if (typeof chrome !== 'undefined' && chrome.app && chrome.app.runtime) {
-        return false;
-    }
-
-    // Firefox OS Apps do not allow eval. This feature detection is very hacky
-    // but even if some other platform adds support for this function this code
-    // will continue to work.
-    if (typeof navigator != 'undefined' && navigator.getDeviceStorage) {
-        return false;
-    }
-
-    try {
-        var f = new Function('', 'return true;');
-        return f();
-    } catch (ex) {
-        return false;
-    }
-}
-
-var hasEval = detectEval();
-
-function isIndex(s) {
-    return +s === s >>> 0 && s !== '';
-}
-
-function toNumber(s) {
-    return +s;
-}
-
-function isObject(obj) {
-    return obj === Object(obj);
-}
-
-var numberIsNaN = Number.isNaN || function (value) {
-    return typeof value === 'number' && isNaN(value);
-}
-
-function areSameValue(left, right) {
-    if (left === right)
-        return left !== 0 || 1 / left === 1 / right;
-    if (numberIsNaN(left) && numberIsNaN(right))
-        return true;
-
-    return left !== left && right !== right;
-}
-
-var createObject = ('__proto__' in {}) ?
-  function (obj) { return obj; } :
-  function (obj) {
-      var proto = obj.__proto__;
-      if (!proto)
-          return obj;
-      var newObject = Object.create(proto);
-      Object.getOwnPropertyNames(obj).forEach(function (name) {
-          Object.defineProperty(newObject, name,
-                               Object.getOwnPropertyDescriptor(obj, name));
-      });
-      return newObject;
-  };
-
-var identStart = '[\$_a-zA-Z]';
-var identPart = '[\$_a-zA-Z0-9]';
-var identRegExp = new RegExp('^' + identStart + '+' + identPart + '*' + '$');
-
-function getPathCharType(char) {
-    if (char === undefined)
-        return 'eof';
-
-    var code = char.charCodeAt(0);
-
-    switch (code) {
-        case 0x5B: // [
-        case 0x5D: // ]
-        case 0x2E: // .
-        case 0x22: // "
-        case 0x27: // '
-        case 0x30: // 0
-            return char;
-
-        case 0x5F: // _
-        case 0x24: // $
-            return 'ident';
-
-        case 0x20: // Space
-        case 0x09: // Tab
-        case 0x0A: // Newline
-        case 0x0D: // Return
-        case 0xA0:  // No-break space
-        case 0xFEFF:  // Byte Order Mark
-        case 0x2028:  // Line Separator
-        case 0x2029:  // Paragraph Separator
-            return 'ws';
-    }
-
-    // a-z, A-Z
-    if ((0x61 <= code && code <= 0x7A) || (0x41 <= code && code <= 0x5A))
-        return 'ident';
-
-    // 1-9
-    if (0x31 <= code && code <= 0x39)
-        return 'number';
-
-    return 'else';
-}
-
-var pathStateMachine = {
-    'beforePath': {
-        'ws': ['beforePath'],
-        'ident': ['inIdent', 'append'],
-        '[': ['beforeElement'],
-        'eof': ['afterPath']
-    },
-
-    'inPath': {
-        'ws': ['inPath'],
-        '.': ['beforeIdent'],
-        '[': ['beforeElement'],
-        'eof': ['afterPath']
-    },
-
-    'beforeIdent': {
-        'ws': ['beforeIdent'],
-        'ident': ['inIdent', 'append']
-    },
-
-    'inIdent': {
-        'ident': ['inIdent', 'append'],
-        '0': ['inIdent', 'append'],
-        'number': ['inIdent', 'append'],
-        'ws': ['inPath', 'push'],
-        '.': ['beforeIdent', 'push'],
-        '[': ['beforeElement', 'push'],
-        'eof': ['afterPath', 'push']
-    },
-
-    'beforeElement': {
-        'ws': ['beforeElement'],
-        '0': ['afterZero', 'append'],
-        'number': ['inIndex', 'append'],
-        "'": ['inSingleQuote', 'append', ''],
-        '"': ['inDoubleQuote', 'append', '']
-    },
-
-    'afterZero': {
-        'ws': ['afterElement', 'push'],
-        ']': ['inPath', 'push']
-    },
-
-    'inIndex': {
-        '0': ['inIndex', 'append'],
-        'number': ['inIndex', 'append'],
-        'ws': ['afterElement'],
-        ']': ['inPath', 'push']
-    },
-
-    'inSingleQuote': {
-        "'": ['afterElement'],
-        'eof': ['error'],
-        'else': ['inSingleQuote', 'append']
-    },
-
-    'inDoubleQuote': {
-        '"': ['afterElement'],
-        'eof': ['error'],
-        'else': ['inDoubleQuote', 'append']
-    },
-
-    'afterElement': {
-        'ws': ['afterElement'],
-        ']': ['inPath', 'push']
-    }
-}
-
-function noop() { }
-
-function parsePath(path) {
-    var keys = [];
-    var index = -1;
-    var c, newChar, key, type, transition, action, typeMap, mode = 'beforePath';
-
-    var actions = {
-        push: function () {
-            if (key === undefined)
-                return;
-
-            keys.push(key);
-            key = undefined;
-        },
-
-        append: function () {
-            if (key === undefined)
-                key = newChar
-            else
-                key += newChar;
-        }
-    };
-
-    function maybeUnescapeQuote() {
-        if (index >= path.length)
-            return;
-
-        var nextChar = path[index + 1];
-        if ((mode == 'inSingleQuote' && nextChar == "'") ||
-            (mode == 'inDoubleQuote' && nextChar == '"')) {
-            index++;
-            newChar = nextChar;
-            actions.append();
-            return true;
-        }
-    }
-
-    while (mode) {
-        index++;
-        c = path[index];
-
-        if (c == '\\' && maybeUnescapeQuote(mode))
-            continue;
-
-        type = getPathCharType(c);
-        typeMap = pathStateMachine[mode];
-        transition = typeMap[type] || typeMap['else'] || 'error';
-
-        if (transition == 'error')
-            return; // parse error;
-
-        mode = transition[0];
-        action = actions[transition[1]] || noop;
-        newChar = transition[2] === undefined ? c : transition[2];
-        action();
-
-        if (mode === 'afterPath') {
-            return keys;
-        }
-    }
-
-    return; // parse error
-}
-
-function isIdent(s) {
-    return identRegExp.test(s);
-}
-
-var constructorIsPrivate = {};
-
-function Path(parts, privateToken) {
-    if (privateToken !== constructorIsPrivate)
-        throw Error('Use Path.get to retrieve path objects');
-
-    for (var i = 0; i < parts.length; i++) {
-        this.push(String(parts[i]));
-    }
-
-    if (hasEval && this.length) {
-        this.getValueFrom = this.compiledGetValueFromFn();
-    }
-}
-
-// TODO(rafaelw): Make simple LRU cache
-var pathCache = {};
-
-function getPath(pathString) {
-    if (pathString instanceof Path)
-        return pathString;
-
-    if (pathString == null || pathString.length == 0)
-        pathString = '';
-
-    if (typeof pathString != 'string') {
-        if (isIndex(pathString.length)) {
-            // Constructed with array-like (pre-parsed) keys
-            return new Path(pathString, constructorIsPrivate);
-        }
-
-        pathString = String(pathString);
-    }
-
-    var path = pathCache[pathString];
-    if (path)
-        return path;
-
-    var parts = parsePath(pathString);
-    if (!parts)
-        return invalidPath;
-
-    var path = new Path(parts, constructorIsPrivate);
-    pathCache[pathString] = path;
-    return path;
-}
-
-Path.get = getPath;
-
-function formatAccessor(key) {
-    if (isIndex(key)) {
-        return '[' + key + ']';
-    } else {
-        return '["' + key.replace(/"/g, '\\"') + '"]';
-    }
-}
-
-Path.prototype = createObject({
-    __proto__: [],
-    valid: true,
-
-    toString: function () {
-        var pathString = '';
-        for (var i = 0; i < this.length; i++) {
-            var key = this[i];
-            if (isIdent(key)) {
-                pathString += i ? '.' + key : key;
-            } else {
-                pathString += formatAccessor(key);
-            }
-        }
-
-        return pathString;
-    },
-
-    getValueFrom: function (obj, directObserver) {
-        for (var i = 0; i < this.length; i++) {
-            if (obj == null)
-                return;
-            obj = obj[this[i]];
-        }
-        return obj;
-    },
-
-    iterateObjects: function (obj, observe) {
-        for (var i = 0; i < this.length; i++) {
-            if (i)
-                obj = obj[this[i - 1]];
-            if (!isObject(obj))
-                return;
-            observe(obj, this[i]);
-        }
-    },
-
-    compiledGetValueFromFn: function () {
-        var str = '';
-        var pathString = 'obj';
-        str += 'if (obj != null';
-        var i = 0;
-        var key;
-        for (; i < (this.length - 1) ; i++) {
-            key = this[i];
-            pathString += isIdent(key) ? '.' + key : formatAccessor(key);
-            str += ' &&\n     ' + pathString + ' != null';
-        }
-        str += ')\n';
-
-        var key = this[i];
-        pathString += isIdent(key) ? '.' + key : formatAccessor(key);
-
-        str += '  return ' + pathString + ';\nelse\n  return undefined;';
-        return new Function('obj', str);
-    },
-
-    setValueFrom: function (obj, value) {
-        if (!this.length)
-            return false;
-
-        for (var i = 0; i < this.length - 1; i++) {
-            if (!isObject(obj))
-                return false;
-            obj = obj[this[i]];
-        }
-
-        if (!isObject(obj))
-            return false;
-
-        obj[this[i]] = value;
-        return true;
-    }
-});
-
-var invalidPath = new Path('', constructorIsPrivate);
-invalidPath.valid = false;
-invalidPath.getValueFrom = invalidPath.setValueFrom = function () { };
-
-exports.Path = Path;
diff --git a/packages/core/js-libs/polymer-expressions/polymer-expressions.d.ts b/packages/core/js-libs/polymer-expressions/polymer-expressions.d.ts
deleted file mode 100644
index 444f06fc7..000000000
--- a/packages/core/js-libs/polymer-expressions/polymer-expressions.d.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-//@private
-export class PolymerExpressions {
-    static getExpression(expression: string): Expression;
-}
-
-export class Expression {
-    /**
-     * Evaluates a value for an expression.
-     * @param model - Context of the expression.
-     * @param isBackConvert - Denotes if the convertion is forward (from model to ui) or back (ui to model).
-     * @param changedModel - A property bag which contains all changed properties (in case of two way binding).
-     */
-    getValue(model, isBackConvert, changedModel);
-}
diff --git a/packages/core/js-libs/polymer-expressions/polymer-expressions.js b/packages/core/js-libs/polymer-expressions/polymer-expressions.js
deleted file mode 100644
index 1a1ddea97..000000000
--- a/packages/core/js-libs/polymer-expressions/polymer-expressions.js
+++ /dev/null
@@ -1,541 +0,0 @@
-// Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
-// This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
-// The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
-// The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
-// Code distributed by Google as part of the polymer project is also
-// subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-
-// Hack to resolve https://github.com/webpack/enhanced-resolve/issues/197 . 
-// This issue causes an require like this (`../esprima`) to be resolved to (`esprima`) by the Angular webpack plugin
-var esprima = require("../../js-libs/esprima").esprima;
-
-var Path = require("./path-parser").Path;
-
-(function (global) {
-    'use strict';
-
-    // TODO(rafaelw): Implement simple LRU.
-    var expressionParseCache = Object.create(null);
-
-    function getExpression(expressionText) {
-        var expression = expressionParseCache[expressionText];
-        if (!expression) {
-            var delegate = new ASTDelegate();
-            esprima.parse(expressionText, delegate);
-            expression = new Expression(delegate);
-            expressionParseCache[expressionText] = expression;
-        }
-        return expression;
-    }
-
-    function Literal(value) {
-        this.value = value;
-        this.valueFn_ = undefined;
-    }
-
-    Literal.prototype = {
-        valueFn: function () {
-            if (!this.valueFn_) {
-                var value = this.value;
-                this.valueFn_ = function () {
-                    return value;
-                }
-            }
-
-            return this.valueFn_;
-        }
-    }
-
-    function IdentPath(name) {
-        this.name = name;
-        this.path = Path.get(name);
-    }
-
-    IdentPath.prototype = {
-        valueFn: function () {
-            if (!this.valueFn_) {
-                var name = this.name;
-                var path = this.path;
-                this.valueFn_ = function (model, observer, changedModel) {
-                    if (observer)
-                        observer.addPath(model, path);
-
-                    if (changedModel) {
-                        var result = path.getValueFrom(changedModel);
-                        if (result !== undefined) {
-                            return result;
-                        }
-                    }
-
-                    return path.getValueFrom(model);
-                }
-            }
-
-            return this.valueFn_;
-        },
-
-        setValue: function (model, newValue) {
-            if (this.path.length == 1) {
-                model = findScope(model, this.path[0]);
-            }
-
-            return this.path.setValueFrom(model, newValue);
-        }
-    };
-
-    function MemberExpression(object, property, accessor) {
-        this.computed = accessor == '[';
-
-        this.dynamicDeps = typeof object == 'function' ||
-                           object.dynamicDeps ||
-                           (this.computed && !(property instanceof Literal));
-
-        this.simplePath =
-            !this.dynamicDeps &&
-            (property instanceof IdentPath || property instanceof Literal) &&
-            (object instanceof MemberExpression || object instanceof IdentPath);
-
-        this.object = this.simplePath ? object : getFn(object);
-        this.property = !this.computed || this.simplePath ?
-            property : getFn(property);
-    }
-
-    MemberExpression.prototype = {
-        get fullPath() {
-            if (!this.fullPath_) {
-
-                var parts = this.object instanceof MemberExpression ?
-                    this.object.fullPath.slice() : [this.object.name];
-                parts.push(this.property instanceof IdentPath ?
-                    this.property.name : this.property.value);
-                this.fullPath_ = Path.get(parts);
-            }
-
-            return this.fullPath_;
-        },
-
-        valueFn: function () {
-            if (!this.valueFn_) {
-                var object = this.object;
-
-                if (this.simplePath) {
-                    var path = this.fullPath;
-
-                    this.valueFn_ = function (model, observer) {
-                        if (observer)
-                            observer.addPath(model, path);
-
-                        return path.getValueFrom(model);
-                    };
-                } else if (!this.computed) {
-                    var path = Path.get(this.property.name);
-
-                    this.valueFn_ = function (model, observer, filterRegistry) {
-                        var context = object(model, observer, filterRegistry);
-
-                        if (observer)
-                            observer.addPath(context, path);
-
-                        return path.getValueFrom(context);
-                    }
-                } else {
-                    // Computed property.
-                    var property = this.property;
-
-                    this.valueFn_ = function (model, observer, filterRegistry) {
-                        var context = object(model, observer, filterRegistry);
-                        var propName = property(model, observer, filterRegistry);
-                        if (observer)
-                            observer.addPath(context, [propName]);
-
-                        return context ? context[propName] : undefined;
-                    };
-                }
-            }
-            return this.valueFn_;
-        },
-
-        setValue: function (model, newValue) {
-            if (this.simplePath) {
-                this.fullPath.setValueFrom(model, newValue);
-                return newValue;
-            }
-
-            var object = this.object(model);
-            var propName = this.property instanceof IdentPath ? this.property.name :
-                this.property(model);
-            return object[propName] = newValue;
-        }
-    };
-
-    function Filter(name, args) {
-        this.name = name;
-        this.args = [];
-        for (var i = 0; i < args.length; i++) {
-            this.args[i] = getFn(args[i]);
-        }
-    }
-
-    Filter.prototype = {
-        transform: function (model, observer, filterRegistry, toModelDirection,
-                            initialArgs) {
-            var fn = filterRegistry[this.name];
-            var context = model;
-            if (fn) {
-                context = undefined;
-            } else {
-                fn = context[this.name];
-                if (!fn) {
-                    console.error('Cannot find function or filter: ' + this.name);
-                    return;
-                }
-            }
-
-            // If toModelDirection is falsey, then the "normal" (dom-bound) direction
-            // is used. Otherwise, it looks for a 'toModel' property function on the
-            // object.
-            if (toModelDirection) {
-                fn = fn.toModel;
-            } else if (typeof fn.toView == 'function') {
-                fn = fn.toView;
-            }
-
-            if (typeof fn != 'function') {
-                console.error('Cannot find function or filter: ' + this.name);
-                return;
-            }
-
-            var args = initialArgs || [];
-            for (var i = 0; i < this.args.length; i++) {
-                args.push(getFn(this.args[i])(model, observer, filterRegistry));
-            }
-
-            return fn.apply(context, args);
-        }
-    };
-
-    function notImplemented() { throw Error('Not Implemented'); }
-
-    var unaryOperators = {
-        '+': function (v) { return +v; },
-        '-': function (v) { return -v; },
-        '!': function (v) { return !v; }
-    };
-
-    var binaryOperators = {
-        '+': function (l, r) { return l + r; },
-        '-': function (l, r) { return l - r; },
-        '*': function (l, r) { return l * r; },
-        '/': function (l, r) { return l / r; },
-        '%': function (l, r) { return l % r; },
-        '<': function (l, r) { return l < r; },
-        '>': function (l, r) { return l > r; },
-        '<=': function (l, r) { return l <= r; },
-        '>=': function (l, r) { return l >= r; },
-        '==': function (l, r) { return l == r; },
-        '!=': function (l, r) { return l != r; },
-        '===': function (l, r) { return l === r; },
-        '!==': function (l, r) { return l !== r; },
-        '&&': function (l, r) { return l && r; },
-        '||': function (l, r) { return l || r; },
-    };
-
-    function getFn(arg) {
-        return typeof arg == 'function' ? arg : arg.valueFn();
-    }
-
-    function ASTDelegate() {
-        this.expression = null;
-        this.filters = [];
-        this.deps = {};
-        this.currentPath = undefined;
-        this.scopeIdent = undefined;
-        this.indexIdent = undefined;
-        this.dynamicDeps = false;
-    }
-
-    ASTDelegate.prototype = {
-        createUnaryExpression: function (op, argument) {
-            if (!unaryOperators[op])
-                throw Error('Disallowed operator: ' + op);
-
-            argument = getFn(argument);
-
-            return function (model, observer, filterRegistry) {
-                return unaryOperators[op](argument(model, observer, filterRegistry));
-            };
-        },
-
-        createBinaryExpression: function (op, left, right) {
-            if (!binaryOperators[op])
-                throw Error('Disallowed operator: ' + op);
-
-            left = getFn(left);
-            right = getFn(right);
-
-            switch (op) {
-                case '||':
-                    this.dynamicDeps = true;
-                    return function (model, observer, filterRegistry) {
-                        return left(model, observer, filterRegistry) ||
-                            right(model, observer, filterRegistry);
-                    };
-                case '&&':
-                    this.dynamicDeps = true;
-                    return function (model, observer, filterRegistry) {
-                        return left(model, observer, filterRegistry) &&
-                            right(model, observer, filterRegistry);
-                    };
-            }
-
-            return function (model, observer, filterRegistry) {
-                return binaryOperators[op](left(model, observer, filterRegistry),
-                                           right(model, observer, filterRegistry));
-            };
-        },
-
-        createConditionalExpression: function (test, consequent, alternate) {
-            test = getFn(test);
-            consequent = getFn(consequent);
-            alternate = getFn(alternate);
-
-            this.dynamicDeps = true;
-
-            return function (model, observer, filterRegistry) {
-                return test(model, observer, filterRegistry) ?
-                    consequent(model, observer, filterRegistry) :
-                    alternate(model, observer, filterRegistry);
-            }
-        },
-
-        createIdentifier: function (name) {
-            var ident = new IdentPath(name);
-            ident.type = 'Identifier';
-            return ident;
-        },
-
-        createMemberExpression: function (accessor, object, property) {
-            var ex = new MemberExpression(object, property, accessor);
-            if (ex.dynamicDeps)
-                this.dynamicDeps = true;
-            return ex;
-        },
-
-        createCallExpression: function (expression, args) {
-            if (!(expression instanceof IdentPath))
-                throw Error('Only identifier function invocations are allowed');
-
-            var filter = new Filter(expression.name, args);
-
-            return function (model, observer, filterRegistry) {
-                return filter.transform(model, observer, filterRegistry, false);
-            };
-        },
-
-        createLiteral: function (token) {
-            return new Literal(token.value);
-        },
-
-        createArrayExpression: function (elements) {
-            for (var i = 0; i < elements.length; i++)
-                elements[i] = getFn(elements[i]);
-
-            return function (model, observer, filterRegistry) {
-                var arr = []
-                for (var i = 0; i < elements.length; i++)
-                    arr.push(elements[i](model, observer, filterRegistry));
-                return arr;
-            }
-        },
-
-        createProperty: function (kind, key, value) {
-            return {
-                key: key instanceof IdentPath ? key.name : key.value,
-                value: value
-            };
-        },
-
-        createObjectExpression: function (properties) {
-            for (var i = 0; i < properties.length; i++)
-                properties[i].value = getFn(properties[i].value);
-
-            return function (model, observer, filterRegistry) {
-                var obj = {};
-                for (var i = 0; i < properties.length; i++)
-                    obj[properties[i].key] =
-                        properties[i].value(model, observer, filterRegistry);
-                return obj;
-            }
-        },
-
-        createFilter: function (name, args) {
-            this.filters.push(new Filter(name, args));
-        },
-
-        createAsExpression: function (expression, scopeIdent) {
-            this.expression = expression;
-            this.scopeIdent = scopeIdent;
-        },
-
-        createInExpression: function (scopeIdent, indexIdent, expression) {
-            this.expression = expression;
-            this.scopeIdent = scopeIdent;
-            this.indexIdent = indexIdent;
-        },
-
-        createTopLevel: function (expression) {
-            this.expression = expression;
-        },
-
-        createThisExpression: notImplemented
-    }
-
-    function Expression(delegate) {
-        this.scopeIdent = delegate.scopeIdent;
-        this.indexIdent = delegate.indexIdent;
-
-        if (!delegate.expression)
-            throw Error('No expression found.');
-
-        this.expression = delegate.expression;
-        getFn(this.expression); // forces enumeration of path dependencies
-
-        this.filters = delegate.filters;
-        this.dynamicDeps = delegate.dynamicDeps;
-    }
-
-    Expression.prototype = {
-        getValue: function (model, isBackConvert, changedModel, observer) {
-            var value = getFn(this.expression)(model.context, observer, changedModel);
-            for (var i = 0; i < this.filters.length; i++) {
-                value = this.filters[i].transform(model.context, observer, model.context, isBackConvert, [value]);
-            }
-
-            return value;
-        },
-
-        setValue: function (model, newValue, filterRegistry) {
-            var count = this.filters ? this.filters.length : 0;
-            while (count-- > 0) {
-                newValue = this.filters[count].transform(model, undefined,
-                    filterRegistry, true, [newValue]);
-            }
-
-            if (this.expression.setValue)
-                return this.expression.setValue(model, newValue);
-        }
-    }
-
-    /**
-     * Converts a style property name to a css property name. For example:
-     * "WebkitUserSelect" to "-webkit-user-select"
-     */
-    function convertStylePropertyName(name) {
-        return String(name).replace(/[A-Z]/g, function (c) {
-            return '-' + c.toLowerCase();
-        });
-    }
-
-    var parentScopeName = '@' + Math.random().toString(36).slice(2);
-
-    // Single ident paths must bind directly to the appropriate scope object.
-    // I.e. Pushed values in two-bindings need to be assigned to the actual model
-    // object.
-    function findScope(model, prop) {
-        while (model[parentScopeName] &&
-               !Object.prototype.hasOwnProperty.call(model, prop)) {
-            model = model[parentScopeName];
-        }
-
-        return model;
-    }
-
-    function isLiteralExpression(pathString) {
-        switch (pathString) {
-            case '':
-                return false;
-
-            case 'false':
-            case 'null':
-            case 'true':
-                return true;
-        }
-
-        if (!isNaN(Number(pathString)))
-            return true;
-
-        return false;
-    };
-
-    function PolymerExpressions() { }
-
-    PolymerExpressions.prototype = {
-        // "built-in" filters
-        styleObject: function (value) {
-            var parts = [];
-            for (var key in value) {
-                parts.push(convertStylePropertyName(key) + ': ' + value[key]);
-            }
-            return parts.join('; ');
-        },
-
-        tokenList: function (value) {
-            var tokens = [];
-            for (var key in value) {
-                if (value[key])
-                    tokens.push(key);
-            }
-            return tokens.join(' ');
-        },
-
-        // binding delegate API
-        prepareInstancePositionChanged: function (template) {
-            var indexIdent = template.polymerExpressionIndexIdent_;
-            if (!indexIdent)
-                return;
-
-            return function (templateInstance, index) {
-                templateInstance.model[indexIdent] = index;
-            };
-        },
-
-        prepareInstanceModel: function (template) {
-            var scopeName = template.polymerExpressionScopeIdent_;
-            if (!scopeName)
-                return;
-
-            var parentScope = template.templateInstance ?
-                template.templateInstance.model :
-                template.model;
-
-            var indexName = template.polymerExpressionIndexIdent_;
-
-            return function (model) {
-                return createScopeObject(parentScope, model, scopeName, indexName);
-            };
-        }
-    };
-
-    var createScopeObject = ('__proto__' in {}) ?
-      function (parentScope, model, scopeName, indexName) {
-          var scope = {};
-          scope[scopeName] = model;
-          scope[indexName] = undefined;
-          scope[parentScopeName] = parentScope;
-          scope.__proto__ = parentScope;
-          return scope;
-      } :
-      function (parentScope, model, scopeName, indexName) {
-          var scope = Object.create(parentScope);
-          Object.defineProperty(scope, scopeName,
-              { value: model, configurable: true, writable: true });
-          Object.defineProperty(scope, indexName,
-              { value: undefined, configurable: true, writable: true });
-          Object.defineProperty(scope, parentScopeName,
-              { value: parentScope, configurable: true, writable: true });
-          return scope;
-      };
-
-    global.PolymerExpressions = PolymerExpressions;
-    PolymerExpressions.getExpression = getExpression;
-})(module.exports);
\ No newline at end of file
diff --git a/packages/core/package.json b/packages/core/package.json
index 4af6f8122..24548ec72 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -6,8 +6,8 @@
   "version": "8.2.0-alpha.0",
   "homepage": "https://nativescript.org",
   "repository": {
-      "type": "git",
-      "url": "https://github.com/NativeScript/NativeScript"
+    "type": "git",
+    "url": "https://github.com/NativeScript/NativeScript"
   },
   "sideEffects": [
     "bundle-entry-points.js",
@@ -15,36 +15,37 @@
     "./globals"
   ],
   "files": [
-      "**/*.d.ts",
-      "**/*.js",
-      "**/*.map",
-      "**/platforms/ios/**",
-      "**/platforms/android/**",
-      "**/package.json"
+    "**/*.d.ts",
+    "**/*.js",
+    "**/*.map",
+    "**/platforms/ios/**",
+    "**/platforms/android/**",
+    "**/package.json"
   ],
   "license": "Apache-2.0",
   "scripts": {
-      "postinstall": "node cli-hooks/postinstall.js",
-      "preuninstall": "node cli-hooks/preuninstall.js"
+    "postinstall": "node cli-hooks/postinstall.js",
+    "preuninstall": "node cli-hooks/preuninstall.js"
   },
   "dependencies": {
-    "css-tree": "^1.1.2",
     "@nativescript/hook": "~2.0.0",
+    "acorn": "^8.7.0",
+    "css-tree": "^1.1.2",
     "reduce-css-calc": "^2.1.7",
     "tslib": "~2.0.0"
   },
   "nativescript": {
-      "platforms": {
-          "ios": "6.0.0",
-          "android": "6.0.0"
-      },
-      "hooks": [
-          {
-              "name": "nativescript-core",
-              "type": "before-checkForChanges",
-              "script": "cli-hooks/before-checkForChanges.js",
-              "inject": true
-          }
-      ]
+    "platforms": {
+      "ios": "6.0.0",
+      "android": "6.0.0"
+    },
+    "hooks": [
+      {
+        "name": "nativescript-core",
+        "type": "before-checkForChanges",
+        "script": "cli-hooks/before-checkForChanges.js",
+        "inject": true
+      }
+    ]
   }
 }
diff --git a/packages/core/ui/core/bindable/bindable-expressions.ts b/packages/core/ui/core/bindable/bindable-expressions.ts
new file mode 100644
index 000000000..e3a903119
--- /dev/null
+++ b/packages/core/ui/core/bindable/bindable-expressions.ts
@@ -0,0 +1,208 @@
+import { parse } from 'acorn';
+import { isFunction, isNullOrUndefined, isObject } from '../../../utils/types';
+
+interface ASTExpression {
+	readonly type: string;
+	readonly [prop: string]: any;
+}
+
+const expressionsCache = {};
+
+// prettier-ignore
+const unaryOperators = {
+	'+': (v) => +v,
+	'-': (v) => -v,
+	'!': (v) => !v,
+	'void': (v) => void v,
+	'typeof': (v) => typeof v
+};
+
+// prettier-ignore
+const binaryOperators = {
+	'+': (l, r) => l + r,
+	'-': (l, r) => l - r,
+	'*': (l, r) => l * r,
+	'/': (l, r) => l / r,
+	'%': (l, r) => l % r,
+	'<': (l, r) => l < r,
+	'>': (l, r) => l > r,
+	'<=': (l, r) => l <= r,
+	'>=': (l, r) => l >= r,
+	'==': (l, r) => l == r,
+	'!=': (l, r) => l != r,
+	'===': (l, r) => l === r,
+	'!==': (l, r) => l !== r,
+	'|': (l, r) => l | r,
+	'in': (l, r) => l in r,
+	'instanceof': (l, r) => l instanceof r
+};
+
+// prettier-ignore
+const logicalOperators = {
+	'&&': (l, r) => l && r(),
+	'||': (l, r) => l || r(),
+	'??': (l, r) => l ?? r()
+};
+
+// prettier-ignore
+const expressionParsers = {
+	'ArrayExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		const parsed = [];
+		for (let element of expression.elements) {
+			let value = convertExpressionToValue(element, model, isBackConvert, changedModel);
+			element.type == 'SpreadElement' ? parsed.push(...value) : parsed.push(value);
+		}
+		return parsed;
+	},
+	'BinaryExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		if (binaryOperators[expression.operator] == null) {
+			throw new Error('Disallowed binary operator: ' + expression.operator);
+		}
+
+		const left = convertExpressionToValue(expression.left, model, isBackConvert, changedModel);
+		const right = convertExpressionToValue(expression.right, model, isBackConvert, changedModel);
+
+		if (expression.operator == '|') {
+			if (right != null && isFunction(right.callback) && right.context != null && right.args != null) {
+				right.args.unshift(left);
+				return right.callback.apply(right.context, right.args);
+			}
+			throw new Error('Invalid converter after ' + expression.operator + ' operator');
+		}
+
+		return binaryOperators[expression.operator](left, right);
+	},
+	'CallExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		let object;
+		let property;
+		if (expression.callee.type == 'MemberExpression') {
+			object = convertExpressionToValue(expression.callee.object, model, isBackConvert, changedModel);
+			property = expression.callee.computed ? convertExpressionToValue(expression.callee.property, model, isBackConvert, changedModel) : expression.callee.property?.name;
+		} else {
+			object = getContext(expression.callee.name, model, changedModel);
+			property = expression.callee?.name;
+		}
+		const callback = expression.callee.optional ? object?.[property] : object[property];
+		const isConverter = isObject(callback) && (isFunction(callback.toModel) || isFunction(callback.toView));
+
+		const parsedArgs = [];
+		for (let argument of expression.arguments) {
+			let value = convertExpressionToValue(argument, model, isBackConvert, changedModel);
+			argument.type == 'SpreadElement' ? parsedArgs.push(...value) : parsedArgs.push(value);
+		}
+
+		if (isNullOrUndefined(callback) || (!isFunction(callback) && !isConverter)) {
+			throw new Error('Cannot perform a call using a non-function property');
+		}
+
+		return isConverter ? getConverter(callback, parsedArgs, isBackConvert) : callback.apply(object, parsedArgs);
+	},
+	'ChainExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		return convertExpressionToValue(expression.expression, model, isBackConvert, changedModel);
+	},
+	'ConditionalExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		const test = convertExpressionToValue(expression.test, model, isBackConvert, changedModel);
+		return convertExpressionToValue(expression[test ? 'consequent' : 'alternate'], model, isBackConvert, changedModel);
+	},
+	'Identifier': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		const context = getContext(expression.name, model, changedModel);
+		return context[expression.name];
+	},
+	'Literal': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		return expression.regex != null ? new RegExp(expression.regex.pattern, expression.regex.flags) : expression.value;
+	},
+	'LogicalExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		if (logicalOperators[expression.operator] == null) {
+			throw new Error('Disallowed logical operator: ' + expression.operator);
+		}
+		const left = convertExpressionToValue(expression.left, model, isBackConvert, changedModel);
+		return logicalOperators[expression.operator](left, () => convertExpressionToValue(expression.right, model, isBackConvert, changedModel));
+	},
+	'MemberExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		const object = convertExpressionToValue(expression.object, model, isBackConvert, changedModel);
+		const property = expression.computed ? convertExpressionToValue(expression.property, model, isBackConvert, changedModel) : expression.property?.name;
+		return expression.optional ? object?.[property] : object[property];
+	},
+	'NewExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		const callback = convertExpressionToValue(expression.callee, model, isBackConvert, changedModel);
+		const parsedArgs = [];
+		for (let argument of expression.arguments) {
+			let value = convertExpressionToValue(argument, model, isBackConvert, changedModel);
+			argument.type == 'SpreadElement' ? parsedArgs.push(...value) : parsedArgs.push(value);
+		}
+		return new callback(...parsedArgs);
+	},
+	'ObjectExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		const parsedObject = {};
+		for (let property of expression.properties) {
+			const value = convertExpressionToValue(property, model, isBackConvert, changedModel);
+			Object.assign(parsedObject, value);
+		}
+		return parsedObject;
+	},
+	'Property': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		const key = expression.computed ? convertExpressionToValue(expression.key, model, isBackConvert, changedModel) : expression.key?.name;
+		const value = convertExpressionToValue(expression.value, model, isBackConvert, changedModel);
+		return {[key]: value};
+	},
+	'SpreadElement': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		const argument = convertExpressionToValue(expression.argument, model, isBackConvert, changedModel);
+		return argument;
+	},
+	'TemplateElement': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		return expression.value.cooked;
+	},
+	'TemplateLiteral': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		let parsedText = '';
+		for (let q of expression.quasis) {
+			parsedText += convertExpressionToValue(q, model, isBackConvert, changedModel);
+		}
+
+		for (let ex of expression.expressions) {
+			parsedText += convertExpressionToValue(ex, model, isBackConvert, changedModel);
+		}
+		return parsedText;
+	},
+	'UnaryExpression': (expression: ASTExpression, model, isBackConvert: boolean, changedModel) => {
+		if (unaryOperators[expression.operator] == null) {
+			throw Error('Disallowed unary operator: ' + expression.operator);
+		}
+
+		const argument = convertExpressionToValue(expression.argument, model, isBackConvert, changedModel);
+		return unaryOperators[expression.operator](argument);
+	}
+};
+
+function getContext(key, model, changedModel) {
+	return key in changedModel ? changedModel : model;
+}
+
+function getConverter(context, args, isBackConvert: boolean) {
+	const converter = { callback: null, context, args };
+	let callback = isBackConvert ? context.toModel : context.toView;
+	if (callback == null) {
+		callback = Function.prototype;
+	}
+	converter.callback = callback;
+	return converter;
+}
+
+export function parseExpression(expressionText: string): ASTExpression {
+	let expression = expressionsCache[expressionText];
+	if (expression == null) {
+		const program: any = parse(expressionText, { ecmaVersion: 2020 });
+		const statements = program.body;
+		for (let statement of statements) {
+			if (statement.type == 'ExpressionStatement') {
+				expression = statement.expression;
+				break;
+			}
+		}
+		expressionsCache[expressionText] = expression;
+	}
+	return expression;
+}
+
+export function convertExpressionToValue(expression: ASTExpression, model, isBackConvert: boolean, changedModel) {
+	return expressionParsers[expression.type](expression, model, isBackConvert, changedModel);
+}
diff --git a/packages/core/ui/core/bindable/index.ts b/packages/core/ui/core/bindable/index.ts
index d0dad11f6..1e22e0458 100644
--- a/packages/core/ui/core/bindable/index.ts
+++ b/packages/core/ui/core/bindable/index.ts
@@ -8,10 +8,9 @@ import { addWeakEventListener, removeWeakEventListener } from '../weak-event-lis
 import { bindingConstants, parentsRegex } from '../../builder/binding-builder';
 import { escapeRegexSymbols } from '../../../utils';
 import { Trace } from '../../../trace';
+import { parseExpression, convertExpressionToValue } from './bindable-expressions';
 import * as types from '../../../utils/types';
 import * as bindableResources from './bindable-resources';
-const polymerExpressions = require('../../../js-libs/polymer-expressions');
-import { PolymerExpressions } from '../../../js-libs/polymer-expressions';
 
 const contextKey = 'context';
 // this regex is used to get parameters inside [] for example:
@@ -360,7 +359,7 @@ export class Binding {
 			}
 
 			const updateExpression = this.prepareExpressionForUpdate();
-			this.prepareContextForExpression(changedModel, updateExpression, undefined);
+			this.prepareContextForExpression(changedModel, updateExpression);
 
 			const expressionValue = this._getExpressionValue(updateExpression, true, changedModel);
 			if (expressionValue instanceof Error) {
@@ -374,13 +373,21 @@ export class Binding {
 	}
 
 	private _getExpressionValue(expression: string, isBackConvert: boolean, changedModel: any): any {
+		let result: any = '';
+
 		if (!__UI_USE_EXTERNAL_RENDERER__) {
+			let context;
+			const addedProps = [];
 			try {
-				const exp = PolymerExpressions.getExpression(expression);
+				let exp;
+				try {
+					exp = parseExpression(expression);
+				} catch (e) {
+					result = e;
+				}
+
 				if (exp) {
-					const context = (this.source && this.source.get && this.source.get()) || global;
-					const model = {};
-					const addedProps = [];
+					context = (this.source && this.source.get && this.source.get()) || global;
 					const resources = bindableResources.get();
 					for (const prop in resources) {
 						if (resources.hasOwnProperty(prop) && !context.hasOwnProperty(prop)) {
@@ -389,26 +396,27 @@ export class Binding {
 						}
 					}
 
-					this.prepareContextForExpression(context, expression, addedProps);
-					model[contextKey] = context;
-					const result = exp.getValue(model, isBackConvert, changedModel ? changedModel : model);
-					// clear added props
-					const addedPropsLength = addedProps.length;
-					for (let i = 0; i < addedPropsLength; i++) {
-						delete context[addedProps[i]];
+					// For expressions, there are also cases when binding must be updated after component is loaded (e.g. ListView)
+					if (this.prepareContextForExpression(context, expression, addedProps)) {
+						result = convertExpressionToValue(exp, context, isBackConvert, changedModel ? changedModel : context);
+					} else {
+						const targetInstance = this.target.get();
+						targetInstance.off('loaded', this.loadedHandlerVisualTreeBinding, this);
+						targetInstance.on('loaded', this.loadedHandlerVisualTreeBinding, this);
 					}
-					addedProps.length = 0;
-
-					return result;
 				}
-
-				return new Error(expression + ' is not a valid expression.');
 			} catch (e) {
 				const errorMessage = 'Run-time error occured in file: ' + e.sourceURL + ' at line: ' + e.line + ' and column: ' + e.column;
-
-				return new Error(errorMessage);
+				result = new Error(errorMessage);
 			}
+
+			// Clear added props
+			for (let prop of addedProps) {
+				delete context[prop];
+			}
+			addedProps.length = 0;
 		}
+		return result;
 	}
 
 	public onSourcePropertyChanged(data: PropertyChangeData) {
@@ -472,24 +480,24 @@ export class Binding {
 		}
 	}
 
-	private prepareContextForExpression(model: Object, expression: string, newProps: Array<string>) {
+	private prepareContextForExpression(model: Object, expression: string, addedProps = []) {
+		const targetInstance = this.target.get();
+
+		let success = true;
 		let parentViewAndIndex: { view: ViewBase; index: number };
 		let parentView;
-		const addedProps = newProps || [];
 		let expressionCP = expression;
 		if (expressionCP.indexOf(bc.bindingValueKey) > -1) {
 			model[bc.bindingValueKey] = model;
 			addedProps.push(bc.bindingValueKey);
 		}
 
-		let success = true;
-
 		const parentsArray = expressionCP.match(parentsRegex);
 		if (parentsArray) {
 			for (let i = 0; i < parentsArray.length; i++) {
 				// This prevents later checks to mistake $parents[] for $parent
 				expressionCP = expressionCP.replace(parentsArray[i], '');
-				parentViewAndIndex = this.getParentView(this.target.get(), parentsArray[i]);
+				parentViewAndIndex = this.getParentView(targetInstance, parentsArray[i]);
 				if (parentViewAndIndex.view) {
 					model[bc.parentsValueKey] = model[bc.parentsValueKey] || {};
 					model[bc.parentsValueKey][parentViewAndIndex.index] = parentViewAndIndex.view.bindingContext;
@@ -501,7 +509,7 @@ export class Binding {
 		}
 
 		if (expressionCP.indexOf(bc.parentValueKey) > -1) {
-			parentView = this.getParentView(this.target.get(), bc.parentValueKey).view;
+			parentView = this.getParentView(targetInstance, bc.parentValueKey).view;
 			if (parentView) {
 				model[bc.parentValueKey] = parentView.bindingContext;
 				addedProps.push(bc.parentValueKey);
@@ -509,13 +517,7 @@ export class Binding {
 				success = false;
 			}
 		}
-
-		// For expressions, there are also cases when binding must be updated after component is loaded (e.g. ListView)
-		if (!success) {
-			const targetInstance = this.target.get();
-			targetInstance.off('loaded', this.loadedHandlerVisualTreeBinding, this);
-			targetInstance.on('loaded', this.loadedHandlerVisualTreeBinding, this);
-		}
+		return success;
 	}
 
 	private getSourcePropertyValue() {