diff --git a/core/package.json b/core/package.json
index 57603b36cc..2f497b80ad 100644
--- a/core/package.json
+++ b/core/package.json
@@ -27,7 +27,7 @@
     "ionicons": "4.4.3"
   },
   "devDependencies": {
-    "@stencil/core": "0.13.0-3",
+    "@stencil/core": "0.13.0-4",
     "@stencil/dev-server": "latest",
     "@stencil/sass": "0.1.0",
     "@stencil/utils": "latest",
@@ -44,7 +44,7 @@
     "stylelint": "^9.4.0",
     "stylelint-order": "^0.8.1",
     "tslint": "^5.10.0",
-    "tslint-ionic-rules": "0.0.18",
+    "tslint-ionic-rules": "0.0.19",
     "tslint-react": "^3.6.0",
     "typescript": "^2.9.2",
     "yargs": "^12.0.1"
diff --git a/core/src/components.d.ts b/core/src/components.d.ts
index 458b1acabd..f1c538b2b3 100644
--- a/core/src/components.d.ts
+++ b/core/src/components.d.ts
@@ -4011,7 +4011,7 @@ export namespace Components {
     * The text to display on the ok button. Default: `OK`.
     */
     'okText': string;
-    'open': (ev?: UIEvent | undefined) => Promise<HTMLIonPopoverElement | HTMLIonActionSheetElement | HTMLIonAlertElement>;
+    'open': (ev?: UIEvent | undefined) => Promise<HTMLIonActionSheetElement | HTMLIonAlertElement | HTMLIonPopoverElement>;
     /**
     * The text to display when the select is empty.
     */
diff --git a/core/src/components/back-button/back-button.tsx b/core/src/components/back-button/back-button.tsx
index 3bc8707f57..0d2fec9fe3 100644
--- a/core/src/components/back-button/back-button.tsx
+++ b/core/src/components/back-button/back-button.tsx
@@ -46,11 +46,11 @@ export class BackButton {
    */
   @Prop() text?: string;
 
-  private onClick(ev: Event) {
+  async onClick(ev: Event) {
     const nav = this.el.closest('ion-nav');
     ev.preventDefault();
 
-    if (nav && nav.canGoBack()) {
+    if (nav && await nav.canGoBack()) {
       return nav.pop({ skipIfBusy: true });
     }
     return openURL(this.win, this.defaultHref, ev, 'back');
diff --git a/core/src/components/datetime/datetime-util.ts b/core/src/components/datetime/datetime-util.ts
index 7df286b0fd..7aa4ba20a4 100644
--- a/core/src/components/datetime/datetime-util.ts
+++ b/core/src/components/datetime/datetime-util.ts
@@ -11,11 +11,11 @@ export function renderDatetime(template: string, value: DatetimeData | undefined
       const token = '{' + index + '}';
       const text = renderTextFormat(format.f, (value as any)[format.k], value, locale);
 
-      if (!hasText && text && (value as any)[format.k] != null) {
+      if (!hasText && text !== undefined && (value as any)[format.k] != null) {
         hasText = true;
       }
 
-      tokens.push(token, text);
+      tokens.push(token, text || '');
 
       template = template.replace(format.f, token);
     }
@@ -32,7 +32,7 @@ export function renderDatetime(template: string, value: DatetimeData | undefined
   return template;
 }
 
-export function renderTextFormat(format: string, value: any, date: DatetimeData | undefined, locale: LocaleData): string {
+export function renderTextFormat(format: string, value: any, date: DatetimeData | undefined, locale: LocaleData): string | undefined {
   if ((format === FORMAT_DDDD || format === FORMAT_DDD)) {
     try {
       value = (new Date(date!.year!, date!.month! - 1, date!.day)).getDay();
@@ -47,7 +47,7 @@ export function renderTextFormat(format: string, value: any, date: DatetimeData
       // ignore
     }
 
-    return '';
+    return undefined;
   }
 
   if (format === FORMAT_A) {
diff --git a/core/src/components/item-sliding/item-sliding.tsx b/core/src/components/item-sliding/item-sliding.tsx
index f668c30f9d..7f241a1c0c 100644
--- a/core/src/components/item-sliding/item-sliding.tsx
+++ b/core/src/components/item-sliding/item-sliding.tsx
@@ -234,9 +234,9 @@ export class ItemSliding {
 
     this.setOpenAmount(restingPoint, true);
 
-    if (this.state & SlidingState.SwipeEnd && this.rightOptions) {
+    if ((this.state & SlidingState.SwipeEnd) !== 0 && this.rightOptions) {
       this.rightOptions.fireSwipeEvent();
-    } else if (this.state & SlidingState.SwipeStart && this.leftOptions) {
+    } else if ((this.state & SlidingState.SwipeStart) !== 0 && this.leftOptions) {
       this.leftOptions.fireSwipeEvent();
     }
   }
diff --git a/core/src/components/menu/test/menu.e2e.ts b/core/src/components/menu/test/menu.e2e.ts
new file mode 100644
index 0000000000..d6baa514d5
--- /dev/null
+++ b/core/src/components/menu/test/menu.e2e.ts
@@ -0,0 +1,34 @@
+import { newE2EPage } from '@stencil/core/testing';
+
+describe('menu', () => {
+
+  it('should open menu', async () => {
+    // create a new e2e test page
+    const page = await newE2EPage({
+      html: `
+      <ion-app>
+        <ion-menu>
+          <ion-content>Content</ion-content>
+        </ion-menu>
+        <div main></div>
+      </ion-app>
+      `
+    });
+
+    const menu = await page.find('ion-menu');
+
+    expect(menu).toHaveClasses([
+      'menu-type-overlay',
+      'menu-side-start',
+    ]);
+
+    await menu.callMethod('open', false);
+    await page.waitForChanges();
+
+    expect(menu).toHaveClasses([
+      'menu-type-overlay',
+      'menu-enabled',
+      'menu-side-start',
+    ]);
+  });
+});
diff --git a/core/src/components/nav-push/nav-push.tsx b/core/src/components/nav-push/nav-push.tsx
index 7f834a1ca0..b83c2f3e13 100644
--- a/core/src/components/nav-push/nav-push.tsx
+++ b/core/src/components/nav-push/nav-push.tsx
@@ -22,7 +22,7 @@ export class NavPush {
   push() {
     const nav = this.el.closest('ion-nav');
     const toPush = this.component;
-    if (nav && toPush) {
+    if (nav && toPush !== undefined) {
       return nav.push(toPush, this.componentProps, { skipIfBusy: true });
     }
     return Promise.resolve(false);
diff --git a/core/src/components/nav-set-root/nav-set-root.tsx b/core/src/components/nav-set-root/nav-set-root.tsx
index cc7e2c823f..20c99d9bb3 100644
--- a/core/src/components/nav-set-root/nav-set-root.tsx
+++ b/core/src/components/nav-set-root/nav-set-root.tsx
@@ -23,7 +23,7 @@ export class NavSetRoot {
   push() {
     const nav = this.el.closest('ion-nav');
     const toPush = this.component;
-    if (nav && toPush) {
+    if (nav && toPush !== undefined) {
       return nav.setRoot(toPush, this.componentProps, { skipIfBusy: true });
     }
     return Promise.resolve(false);
diff --git a/core/src/components/nav/nav.tsx b/core/src/components/nav/nav.tsx
index 7e2dce913b..600c8930df 100644
--- a/core/src/components/nav/nav.tsx
+++ b/core/src/components/nav/nav.tsx
@@ -436,7 +436,7 @@ export class Nav implements NavOutlet {
   }
 
   private canGoBackSync(view = this.getActiveSync()): boolean {
-    return !!(view && this.getPrevious(view));
+    return !!(view && this.getPreviousSync(view));
   }
 
   private getPreviousSync(view = this.getActiveSync()): ViewController | undefined {
diff --git a/core/src/components/router-outlet/route-outlet.tsx b/core/src/components/router-outlet/route-outlet.tsx
index 80a91110e1..fe12ad8224 100644
--- a/core/src/components/router-outlet/route-outlet.tsx
+++ b/core/src/components/router-outlet/route-outlet.tsx
@@ -105,7 +105,7 @@ export class RouterOutlet implements NavOutlet {
     let resolve!: () => void;
     this.waitPromise = new Promise(r => resolve = r);
 
-    if (p) {
+    if (p !== undefined) {
       await p;
     }
     return resolve;
diff --git a/core/src/components/router/router.tsx b/core/src/components/router/router.tsx
index f4bed64cad..cecf5d09a9 100644
--- a/core/src/components/router/router.tsx
+++ b/core/src/components/router/router.tsx
@@ -219,7 +219,7 @@ export class Router {
     let resolve!: () => void;
     this.waitPromise = new Promise(r => resolve = r);
 
-    if (p) {
+    if (p !== undefined) {
       await p;
     }
     return resolve;
diff --git a/core/src/components/select/select.tsx b/core/src/components/select/select.tsx
index 506460eb0e..af1e89af68 100644
--- a/core/src/components/select/select.tsx
+++ b/core/src/components/select/select.tsx
@@ -471,7 +471,7 @@ export class Select {
     let addPlaceholderClass = false;
 
     let selectText = this.selectedText || this.text;
-    if (selectText === undefined && this.placeholder) {
+    if (selectText === undefined && this.placeholder !== undefined) {
       selectText = this.placeholder;
       addPlaceholderClass = true;
     }
diff --git a/core/src/components/tab/tab.tsx b/core/src/components/tab/tab.tsx
index ae7d888646..2aabf5eda3 100644
--- a/core/src/components/tab/tab.tsx
+++ b/core/src/components/tab/tab.tsx
@@ -131,7 +131,7 @@ export class Tab {
   }
 
   private prepareLazyLoaded(): Promise<HTMLElement | void> {
-    if (!this.loaded && this.component) {
+    if (!this.loaded && this.component != null) {
       this.loaded = true;
       return attachComponent(this.delegate, this.el, this.component, ['ion-page']);
     }
diff --git a/core/src/components/virtual-scroll/virtual-scroll.tsx b/core/src/components/virtual-scroll/virtual-scroll.tsx
index c2e464cafe..f95bef4b93 100644
--- a/core/src/components/virtual-scroll/virtual-scroll.tsx
+++ b/core/src/components/virtual-scroll/virtual-scroll.tsx
@@ -272,7 +272,7 @@ export class VirtualScroll {
     }
   }
 
-  private updateCellHeight(cell: Cell, node: HTMLStencilElement) {
+  private updateCellHeight(cell: Cell, node: any) {
     const update = () => {
       if ((node as any)['$ionCell'] === cell) {
         const style = this.win.getComputedStyle(node);
diff --git a/core/src/interface.d.ts b/core/src/interface.d.ts
index 447e7270f1..27b889e25d 100644
--- a/core/src/interface.d.ts
+++ b/core/src/interface.d.ts
@@ -37,7 +37,7 @@ export type PredefinedColors = 'primary' | 'secondary' | 'tertiary' | 'success'
 export type Color = PredefinedColors | string;
 export type Mode = 'ios' | 'md';
 export type ComponentTags = keyof StencilIntrinsicElements;
-export type ComponentRef = Function | HTMLElement | string;
+export type ComponentRef = Function | HTMLElement | string | null;
 export type ComponentProps<T = null> = T extends ComponentTags ? StencilIntrinsicElements[T] : {[key: string]: any};
 export type CssClassMap = { [className: string]: boolean };
 export type BackButtonEvent = CustomEvent<{
diff --git a/core/src/utils/hardware-back-button.ts b/core/src/utils/hardware-back-button.ts
index 9e7d9d690b..0318b13910 100644
--- a/core/src/utils/hardware-back-button.ts
+++ b/core/src/utils/hardware-back-button.ts
@@ -1,6 +1,6 @@
 import { BackButtonEvent } from '../interface';
 
-type Handler = () => Promise<any> | void;
+type Handler = () => Promise<any> | void | null;
 
 interface HandlerRegister {
   priority: number;
@@ -35,7 +35,7 @@ export function startHardwareBackButton(win: Window) {
         }
       });
       const result = handler!();
-      if (result) {
+      if (result != null) {
         // tslint:disable-next-line:no-floating-promises
         result.then(() => busy = false);
       }
diff --git a/core/src/utils/input-shims/hacks/scroll-assist.ts b/core/src/utils/input-shims/hacks/scroll-assist.ts
index 9088336c1a..291359da9c 100644
--- a/core/src/utils/input-shims/hacks/scroll-assist.ts
+++ b/core/src/utils/input-shims/hacks/scroll-assist.ts
@@ -75,7 +75,7 @@ function jsSetFocus(
   });
 }
 
-function hasPointerMoved(threshold: number, startCoord: PointerCoordinates, endCoord: PointerCoordinates) {
+function hasPointerMoved(threshold: number, startCoord: PointerCoordinates | undefined, endCoord: PointerCoordinates | undefined) {
   if (startCoord && endCoord) {
     const deltaX = (startCoord.x - endCoord.x);
     const deltaY = (startCoord.y - endCoord.y);
diff --git a/core/src/utils/theme.ts b/core/src/utils/theme.ts
index 9bf0d621d5..6b91e65fd9 100644
--- a/core/src/utils/theme.ts
+++ b/core/src/utils/theme.ts
@@ -1,7 +1,7 @@
 import { Color, CssClassMap, Mode, RouterDirection } from '../interface';
 
 export function hostContext(selector: string, el: HTMLElement): boolean {
-  return !!el.closest(selector);
+  return el.closest(selector) !== null;
 }
 
 /**
@@ -38,8 +38,8 @@ export function getClassMap(classes: string | string[] | undefined): CssClassMap
   return map;
 }
 
-export async function openURL(win: Window, url: string | undefined, ev: Event | undefined | null, direction?: RouterDirection): Promise<boolean> {
-  if (url && url[0] !== '#' && url.indexOf('://') === -1) {
+export async function openURL(win: Window, url: string | undefined | null, ev: Event | undefined | null, direction?: RouterDirection): Promise<boolean> {
+  if (url != null && url[0] !== '#' && url.indexOf('://') === -1) {
     const router = win.document.querySelector('ion-router');
     if (router) {
       if (ev != null) {
diff --git a/core/tslint.json b/core/tslint.json
index acc99d9649..30987e5c35 100644
--- a/core/tslint.json
+++ b/core/tslint.json
@@ -15,6 +15,7 @@
     "no-null-keyword": false,
     "no-console": false,
     "no-unbound-method": true,
+    "no-floating-promises": true,
 
     "jsx-key": false,
     "jsx-self-close": false,