fix(@angular-devkit/build-angular): generate ES5 code in ES5 bundles for default browserslist configuration

packages/angular_devkit/build_angular/package.json

@@ -18,9 +18,9 @@
     "ajv": "6.10.2",
     "autoprefixer": "9.7.1",
     "babel-loader": "8.0.6",
-    "browserslist": "4.8.3",
+    "browserslist": "^4.9.1",
     "cacache": "13.0.1",
-    "caniuse-lite": "1.0.30001020",
+    "caniuse-lite": "^1.0.30001032",
     "cssnano": "4.1.10",
     "circular-dependency-plugin": "5.2.0",
     "coverage-istanbul-loader": "2.0.3",

packages/angular_devkit/build_angular/src/utils/process-bundle.ts

@@ -118,6 +118,17 @@ export async function process(options: ProcessBundleOptions): Promise<ProcessBun
   let downlevelCode;
   let downlevelMap;
   if (downlevel) {
+    const {supportedBrowsers: targets = []} = options;
+
+    // todo: revisit this in version 10, when we update our defaults browserslist
+    // Without this workaround bundles will not be downlevelled because Babel doesn't know handle to 'op_mini all'
+    // See: https://github.com/babel/babel/issues/11155
+    if (Array.isArray(targets) && targets.includes('op_mini all')) {
+      targets.push('ie_mob 11');
+    } else if ('op_mini' in targets) {
+      targets['ie_mob'] = '11';
+    }
+
     // Downlevel the bundle
     const transformResult = await transformAsync(sourceCode, {
       filename,
@@ -131,7 +142,7 @@ export async function process(options: ProcessBundleOptions): Promise<ProcessBun
         require.resolve('@babel/preset-env'),
         {
           // browserslist-compatible query or object of minimum environment versions to support
-          targets: options.supportedBrowsers,
+          targets,
           // modules aren't needed since the bundles use webpack's custom module loading
           modules: false,
           // 'transform-typeof-symbol' generates slower code

yarn.lock

@@ -2581,7 +2581,7 @@ browserify-zlib@^0.2.0:
   dependencies:
     pako "~1.0.5"
 
-browserslist@4.8.3, browserslist@^4.0.0:
+browserslist@^4.0.0:
   version "4.8.3"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.8.3.tgz#65802fcd77177c878e015f0e3189f2c4f627ba44"
   integrity sha512-iU43cMMknxG1ClEZ2MDKeonKE1CCrFVkQK2AqO2YWFmvIrx4JWrvQ4w4hQez6EpVI8rHTtqh/ruHHDHSOKxvUg==
@@ -2608,6 +2608,15 @@ browserslist@^4.8.2:
     electron-to-chromium "^1.3.322"
     node-releases "^1.1.42"
 
+browserslist@^4.9.1:
+  version "4.9.1"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.9.1.tgz#01ffb9ca31a1aef7678128fc6a2253316aa7287c"
+  integrity sha512-Q0DnKq20End3raFulq6Vfp1ecB9fh8yUNV55s8sekaDDeqBaCtWlRHCUdaWyUeSSBJM7IbM6HcsyaeYqgeDhnw==
+  dependencies:
+    caniuse-lite "^1.0.30001030"
+    electron-to-chromium "^1.3.363"
+    node-releases "^1.1.50"
+
 browserstack@^1.5.1:
   version "1.5.3"
   resolved "https://registry.yarnpkg.com/browserstack/-/browserstack-1.5.3.tgz#93ab48799a12ef99dbd074dd595410ddb196a7ac"
@@ -2851,11 +2860,6 @@ caniuse-api@^3.0.0:
     lodash.memoize "^4.1.2"
     lodash.uniq "^4.5.0"
 
-caniuse-lite@1.0.30001020:
-  version "1.0.30001020"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001020.tgz#3f04c1737500ffda78be9beb0b5c1e2070e15926"
-  integrity sha512-yWIvwA68wRHKanAVS1GjN8vajAv7MBFshullKCeq/eKpK7pJBVDgFFEqvgWTkcP2+wIDeQGYFRXECjKZnLkUjA==
-
 caniuse-lite@^1.0.0:
   version "1.0.30001017"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001017.tgz#d3ad6ec18148b9bd991829958d9d7e562bb78cd6"
@@ -2876,6 +2880,11 @@ caniuse-lite@^1.0.30001017:
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001018.tgz#dd5cd57e77980db03e4fb7a4e9b4a96e32e1d733"
   integrity sha512-GTHI7xdD2EX/U9UgNCEdekriT81N6ZwipsTGKAI1hrv3VEC96BvS5RVoc9Odlf9ftS92oxgflAGbYLi8UjIiVA==
 
+caniuse-lite@^1.0.30001030, caniuse-lite@^1.0.30001032:
+  version "1.0.30001032"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001032.tgz#b8d224914e2cd7f507085583d4e38144c652bce4"
+  integrity sha512-8joOm7BwcpEN4BfVHtfh0hBXSAPVYk+eUIcNntGtMkUWy/6AKRCDZINCLe3kB1vHhT2vBxBF85Hh9VlPXi/qjA==
+
 canonical-path@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/canonical-path/-/canonical-path-1.0.0.tgz#fcb470c23958def85081856be7a86e904f180d1d"
@@ -4344,6 +4353,11 @@ electron-to-chromium@^1.3.322:
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.322.tgz#a6f7e1c79025c2b05838e8e344f6e89eb83213a8"
   integrity sha512-Tc8JQEfGQ1MzfSzI/bTlSr7btJv/FFO7Yh6tanqVmIWOuNCu6/D1MilIEgLtmWqIrsv+o4IjpLAhgMBr/ncNAA==
 
+electron-to-chromium@^1.3.363:
+  version "1.3.368"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.368.tgz#d7597e04339f7ca70762031ec473d38eb2df6acb"
+  integrity sha512-fqzDipW3p+uDkHUHFPrdW3wINRKcJsbnJwBD7hgaQEQwcuLSvNLw6SeUp5gKDpTbmTl7zri7IZfhsdTUTnygJg==
+
 elliptic@^6.0.0:
   version "6.5.1"
   resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.1.tgz#c380f5f909bf1b9b4428d028cd18d3b0efd6b52b"
@@ -7957,6 +7971,13 @@ node-releases@^1.1.44:
   dependencies:
     semver "^6.3.0"
 
+node-releases@^1.1.50:
+  version "1.1.50"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.50.tgz#803c40d2c45db172d0410e4efec83aa8c6ad0592"
+  integrity sha512-lgAmPv9eYZ0bGwUYAKlr8MG6K4CvWliWqnkcT2P8mMAgVrH3lqfBPorFlxiG1pHQnqmavJZ9vbMXUTNyMLbrgQ==
+  dependencies:
+    semver "^6.3.0"
+
 node-sass-tilde-importer@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/node-sass-tilde-importer/-/node-sass-tilde-importer-1.0.2.tgz#1a15105c153f648323b4347693fdb0f331bad1ce"