perf(angular): bundle size improvements for angular (#16966)

core/package.json

@@ -16,11 +16,15 @@
     "pwa"
   ],
   "main": "dist/index.js",
-  "module": "dist/esm/es5/index.js",
+  "unpkg": "dist/ionic.js",
+  "module": "dist/esm/index.js",
+  "es2015": "dist/esm/es2017/index.js",
+  "es2017": "dist/esm/es2017/index.js",
+  "jsnext:main": "dist/esm/es2017/index.js",
+  "sideEffects": false,
   "types": "dist/types/interface.d.ts",
   "collection": "dist/collection/collection-manifest.json",
   "webComponents": "dist/web-components.json",
-  "unpkg": "dist/ionic.js",
   "files": [
     "dist/",
     "css/",
@@ -30,7 +34,7 @@
     "ionicons": "4.5.1"
   },
   "devDependencies": {
-    "@stencil/core": "0.16.2-2",
+    "@stencil/core": "0.16.2",
     "@stencil/sass": "0.1.1",
     "@stencil/utils": "latest",
     "@types/jest": "^23.3.1",

core/src/utils/hardware-back-button.ts

@@ -27,16 +27,16 @@ export function startHardwareBackButton(win: Window) {
 
     if (handlers.length > 0) {
       let selectedPriority = Number.MIN_SAFE_INTEGER;
-      let handler: Handler | undefined;
-      handlers.forEach(h => {
-        if (h.priority >= selectedPriority) {
-          selectedPriority = h.priority;
-          handler = h.handler;
+      let selectedHandler: Handler | undefined;
+      handlers.forEach(({ priority, handler }) => {
+        if (priority >= selectedPriority) {
+          selectedPriority = priority;
+          selectedHandler = handler;
         }
       });
 
       busy = true;
-      executeAction(handler).then(() => busy = false);
+      executeAction(selectedHandler).then(() => busy = false);
     }
   });
 }

core/stencil.config.ts

@@ -82,6 +82,7 @@ export const config: Config = {
       useDirectives: false,
       componentCorePackage: '@ionic/core',
       directivesProxyFile: '../angular/src/directives/proxies.ts',
+      directivesUtilsFile: '../angular/src/directives/proxies-utils.ts',
       directivesArrayFile: '../angular/src/directives/proxies-list.txt',
       excludeComponents: [
         // overlays