feat(build): uses non-polluting polyfills

replace preset-env + useBuiltIns with preset-env + polyfill-corejs3(usage-pure) + babel-plugin-polyfill-regenerator(usage-pure)

Author: FranckFreiburger

build/webpack.config.js

@@ -93,8 +93,6 @@ const configure = ({name, vueTarget, libraryTargetModule}) => (env = {}, { mode
 		},
 
 		entry: [
-			'core-js',
-			'regenerator-runtime',
 			Path.resolve(__dirname, '../src/index.ts'),
 		],
 
@@ -190,15 +188,17 @@ const configure = ({name, vueTarget, libraryTargetModule}) => (env = {}, { mode
 								arrows: caniuse.isSupported('arrow-functions', targetsBrowsers),
 								ecma: caniuse.isSupported('es6', targetsBrowsers) ? '2015' : '5', // note ECMAScript 2015 is the sixth edition of the ECMAScript Language Specification standard
 							} : {},
-							unsafe: true,
-							unsafe_comps: true,
-							unsafe_Function: true,
-							unsafe_math: true,
-							unsafe_symbols: true,
-							unsafe_methods: caniuse.isSupported('es6', targetsBrowsers),
-							unsafe_proto: true,
-							unsafe_regexp: true,
-							unsafe_undefined: true,
+							
+							// beware, unsafe: true is not suitable for this project !
+							// unsafe: true,
+							// unsafe_comps: true,
+							// unsafe_Function: true,
+							// unsafe_math: true,
+							// unsafe_symbols: true,
+							// unsafe_methods: caniuse.isSupported('es6', targetsBrowsers),
+							// unsafe_proto: true,
+							// unsafe_regexp: true,
+							// unsafe_undefined: true,
 						},
 					},
 				}),
@@ -340,38 +340,45 @@ ${ pkg.name } v${ pkg.version } for vue${ vueTarget }
 		module: {
 			rules: [
 				isProd ? {
-					test: /\.(mjs|js|ts)$/,
+					test: /\.(mjs|js|cjs|ts)$/,
 					exclude: [
-						/core-js/, // Babel should not transpile core-js for correct work.
+						/core-js-pure/, // Babel should not transpile core-js for correct work.
 						/regenerator-runtime/, // transpile not needed
 					],
 					use: {
 						loader: 'babel-loader',
 						options: {
 							compact: !noCompress,
 							sourceMaps: !noSourceMap,
-
+							sourceType: 'unambiguous', // doc: https://babeljs.io/docs/en/options#sourcetype
+							targets: targetsBrowsers,
 							presets: [
 
 								...!noPresetEnv ? [
 									[
 										'@babel/preset-env',
 										{
-											useBuiltIns: 'entry', // https://babeljs.io/docs/en/babel-preset-env#usebuiltins
-											corejs: {
-												version: 3,
-												proposals: true
-											},
-											forceAllTransforms: true,
-											targets: {
-												browsers: targetsBrowsers,
-											},
 										}
 									]
 								] : [],
 							],
-
 							plugins: [
+
+								...!noPresetEnv ? [
+									[
+										"polyfill-corejs3",
+										{
+											"method": "usage-pure"
+										}
+									],
+									[
+										'babel-plugin-polyfill-regenerator',
+										{
+											"method": "usage-pure"
+										}
+									]
+								] : [],
+
 							],
 						}
 					}

package.json

@@ -64,11 +64,12 @@
     "@vue/shared": "^3.0.11",
     "assert": "^2.0.0",
     "babel-loader": "^8.2.2",
+    "babel-plugin-polyfill-corejs3": "^0.2.3",
     "bn.js": "5",
     "buffer": "^6.0.3",
     "caniuse-api": "^3.0.0",
     "compression-webpack-plugin": "^8.0.0",
-    "core-js": "^3.15.0",
+    "core-js-pure": "^3.15.1",
     "cross-env": "^7.0.3",
     "dts-bundle": "^0.7.3",
     "duplicate-package-checker-webpack-plugin": "^3.0.0",

yarn.lock

@@ -2161,7 +2161,7 @@ babel-plugin-polyfill-corejs2@^0.2.2:
     "@babel/helper-define-polyfill-provider" "^0.2.2"
     semver "^6.1.1"
 
-babel-plugin-polyfill-corejs3@^0.2.2:
+babel-plugin-polyfill-corejs3@^0.2.2, babel-plugin-polyfill-corejs3@^0.2.3:
   version "0.2.3"
   resolved "https://registry.yarnpkg.com/babel-plugin-polyfill-corejs3/-/babel-plugin-polyfill-corejs3-0.2.3.tgz#72add68cf08a8bf139ba6e6dfc0b1d504098e57b"
   integrity sha512-rCOFzEIJpJEAU14XCcV/erIf/wZQMmMT5l5vXOpL5uoznyOGfDIjPj6FVytMvtzaKSTSVKouOCTPJ5OMUZH30g==
@@ -2819,10 +2819,10 @@ core-js-compat@^3.14.0, core-js-compat@^3.15.0:
     browserslist "^4.16.6"
     semver "7.0.0"
 
-core-js@^3.15.0:
-  version "3.15.0"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.15.0.tgz#db9554ebce0b6fd90dc9b1f2465c841d2d055044"
-  integrity sha512-GUbtPllXMYRzIgHNZ4dTYTcUemls2cni83Q4Q/TrFONHfhcg9oEGOtaGHfb0cpzec60P96UKPvMkjX1jET8rUw==
+core-js-pure@^3.15.1:
+  version "3.15.1"
+  resolved "https://registry.yarnpkg.com/core-js-pure/-/core-js-pure-3.15.1.tgz#8356f6576fa2aa8e54ca6fe02620968ff010eed7"
+  integrity sha512-OZuWHDlYcIda8sJLY4Ec6nWq2hRjlyCqCZ+jCflyleMkVt3tPedDVErvHslyS2nbO+SlBFMSBJYvtLMwxnrzjA==
 
 [email protected], core-util-is@~1.0.0:
   version "1.0.2"