fix(esm): fix minify es5 for esm

Author: adamdbradley

readme.md

@@ -157,17 +157,18 @@ For the small minority of browsers that do not support modern browser features a
  - [async/await](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function) *(transpiled to promises)*
  - [fetch()](https://github.com/github/fetch)
  - [URL](https://github.com/lifaon74/url-polyfill)
+ - [Array.fill](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/fill)
  - [Array.find](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find)
  - [Array.findIndex](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex)
  - [Array.from](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from)
  - [Array.includes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes)
- - [Array.fill](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/fill)
  - [Element.closest](https://github.com/jonathantneal/closest)
  - [Element.matches](https://github.com/jonathantneal/closest)
  - [Element.remove](https://developer.mozilla.org/en-US/docs/Web/API/ChildNode/remove)
+ - [Map/Set/WeakMap/WeakSet](https://github.com/WebReflection/es6-collections)
  - [Object.assign](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)
  - [Object.entries](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries)
-  - [Object.values](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values)
+ - [Object.values](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values)
  - [String.startsWith](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith)
  - [String.endsWith](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith)
  - [String.includes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes)

scripts/build-polyfills.js

@@ -55,11 +55,18 @@ module.exports = async function buildPolyfills(transpiledPolyfillsDir, outputPol
 
   const minify = terser.minify(transpile.outputText);
 
+  const cssShimOutput = minify.code;
+
+  const mapPolyfillFilePath = path.join(SRC_DIR, 'map.js');
+  const mapPolyfill = fs.readFileSync(mapPolyfillFilePath, 'utf8');
+
+  const cssShimMapPolyfill = mapPolyfill + '\n' + cssShimOutput;
+
   const esmFilePath = path.join(esmDir, 'css-shim.js');
   const es5FilePath = path.join(es5Dir, 'css-shim.js');
 
-  fs.writeFileSync(esmFilePath, esmWrap(minify.code));
-  fs.writeFileSync(es5FilePath, minify.code);
+  fs.writeFileSync(esmFilePath, esmWrap(cssShimMapPolyfill));
+  fs.writeFileSync(es5FilePath, cssShimMapPolyfill);
 };
 
 

src/client/polyfills/array.js

@@ -1,3 +1,8 @@
+/*!
+Array.prototype.fill
+*/
+Array.prototype.fill||Object.defineProperty(Array.prototype,"fill",{value:function(t){var r,e,i,n,o,a,l;if(null==this)throw new TypeError("this is null or not defined");for(e=(r=Object(this)).length>>>0,n=(i=arguments[1]>>0)<0?Math.max(e+i,0):Math.min(i,e),l=(a=void 0===(o=arguments[2])?e:o>>0)<0?Math.max(e+a,0):Math.min(a,e);n<l;)r[n]=t,n++;return r}});
+
 /*!
 Array.prototype.find
 */
@@ -15,7 +20,3 @@ Number(k.length);a=isNaN(a)?0:0!==a&&isFinite(a)?(0<a?1:-1)*Math.floor(Math.abs(
 Array.prototype.includes
 */
 Array.prototype.includes||Object.defineProperty(Array.prototype,"includes",{writable:!0,configurable:!0,value:function(r,e){if(null==this)throw new TypeError('"this" is null or not defined');var t=Object(this),n=t.length>>>0;if(0===n)return!1;var i,o,a=0|e,u=Math.max(0<=a?a:n-Math.abs(a),0);for(;u<n;){if((i=t[u])===(o=r)||"number"==typeof i&&"number"==typeof o&&isNaN(i)&&isNaN(o))return!0;u++}return!1}});
-/*!
-Array.prototype.fill
-*/
-Array.prototype.fill||Object.defineProperty(Array.prototype,"fill",{value:function(t){var r,e,i,n,o,a,l;if(null==this)throw new TypeError("this is null or not defined");for(e=(r=Object(this)).length>>>0,n=(i=arguments[1]>>0)<0?Math.max(e+i,0):Math.min(i,e),l=(a=void 0===(o=arguments[2])?e:o>>0)<0?Math.max(e+a,0):Math.min(a,e);n<l;)r[n]=t,n++;return r}});

src/client/polyfills/index.js

@@ -40,6 +40,7 @@ const INLINE_POLYFILLS = [
   'object.js',
   'string.js',
   'promise.js',
+  'map.js',
   'fetch.js',
   'url.js'
 ];

src/client/polyfills/map.js

@@ -50,6 +50,7 @@ export async function minifyCore(config: d.Config, compilerCtx: d.CompilerCtx, s
     opts.output.ecma = 5;
     opts.compress.ecma = 5;
     opts.compress.arrows = false;
+    opts.compress.module = false;
 
   } else {
     opts.ecma = 7;
@@ -58,8 +59,6 @@ export async function minifyCore(config: d.Config, compilerCtx: d.CompilerCtx, s
     opts.compress.module = true;
   }
 
-  opts.compress.toplevel = true;
-
   if (config.minifyJs) {
     if (sourceTarget !== 'es5') {
       opts.compress.arrows = true;
@@ -139,8 +138,9 @@ const DEV_MINIFY_OPTS: any = {
     sequences: true,
     side_effects: true,
     switches: false,
-    typeofs: false,
+    toplevel: true,
     top_retain: false,
+    typeofs: false,
     unsafe: false,
     unsafe_arrows: false,
     unsafe_comps: false,
@@ -206,6 +206,7 @@ const PROD_MINIFY_OPTS: any = {
     sequences: true,
     side_effects: true,
     switches: true,
+    toplevel: true,
     typeofs: true,
     unsafe: false,
     unsafe_arrows: false,