⭐ new: ES modules for browser (#561)

* ⭐ new: ES modules for browser * 📌 dependency: remove uglify-js * 📝 docs(dist): update dist/README.md * 📝 docs(vuepress): update installation
kazupon · Apr 14, 2019 · c9b9adf · c9b9adf
1 parent a1800cb
commit c9b9adf
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Showing 6 changed files with 55 additions and 97 deletions.
diff --git a/config/bundle.js b/config/bundle.js
@@ -2,7 +2,7 @@ const fs = require('fs')
 const path = require('path')
 const zlib = require('zlib')
 const rollup = require('rollup')
-const uglify = require('uglify-js')
+const terser = require('terser')
 
 module.exports = build
 
@@ -28,8 +28,8 @@ function buildEntry (config) {
     .then(bundle => bundle.generate(output))
     .then(({ code }) => {
       if (isProd) {
-        var minified = (banner ? banner + '\n' : '') + uglify.minify(code, {
-          fromString: true,
+        var minified = (banner ? banner + '\n' : '') + terser.minify(code, {
+          toplevel: true,
           output: {
             ascii_only: true
           },

diff --git a/config/entry.js b/config/entry.js
@@ -46,6 +46,22 @@ const entries = {
     env: 'development',
     moduleName,
     banner
+  },
+  browser_development: {
+    entry: 'src/index.js',
+    dest: resolve(`dist/${pack.name}.esm.browser.js`),
+    format: 'es',
+    env: 'development',
+    moduleName,
+    transpile: false
+  },
+  browser_production: {
+    entry: 'src/index.js',
+    dest: resolve(`dist/${pack.name}.esm.browser.min.js`),
+    format: 'es',
+    env: 'production',
+    moduleName,
+    transpile: false
   }
 }
 
@@ -61,8 +77,7 @@ function genConfig (opts) {
     plugins: [
       flow(),
       node(),
-      cjs(),
-      buble()
+      cjs()
     ]
   }
 
@@ -72,6 +87,10 @@ function genConfig (opts) {
   }
   config.plugins.push(replace(replacePluginOptions))
 
+  if (opts.transpile !== false) {
+    config.plugins.push(buble())
+  }
+
   return config
 }
 

diff --git a/dist/README.md b/dist/README.md
@@ -1,13 +1,16 @@
-## Explanation of Build Files
+## Explanation of Different Builds
 
-- UMD: vue-i18n.js
-- CommonJS: vue-i18n.common.js
-- ES Module: vue-i18n.esm.js
+- UMD: `vue-i18n.js`
+- CommonJS: `vue-i18n.common.js`
+- ES Module for bundlers: `vue-i18n.esm.js`
+- ES Module for browsers: `vue-i18n.esm.browser.js`
 
 ### Terms
 
 - **[UMD](https://github.com/umdjs/umd)**: UMD builds can be used directly in the browser via a `<script>` tag. The default file from Unpkg CDN at [https://unpkg.com/vue-i18n](https://unpkg.com/vue-i18n) is the UMD build (`vue-i18n.js`).
 
 - **[CommonJS](http://wiki.commonjs.org/wiki/Modules/1.1)**: CommonJS builds are intended for use with older bundlers like [browserify](http://browserify.org/) or [webpack 1](https://webpack.github.io). The default file for these bundlers (`pkg.main`) is the Runtime only CommonJS build (`vue-i18n.common.js`).
 
-- **[ES Module](http://exploringjs.com/es6/ch_modules.html)**: ES module builds are intended for use with modern bundlers like [webpack 2](https://webpack.js.org) or [rollup](http://rollupjs.org/). The default file for these bundlers (`pkg.module`) is the Runtime only ES Module build (`vue-i18n.esm.js`).
+- **[ES Module](http://exploringjs.com/es6/ch_modules.html)**: starting in 8.11 VueI18n provides two ES Modules (ESM) builds:
+  - ESM for bundlers: intended for use with modern bundlers like [webpack 2](https://webpack.js.org) or [Rollup](https://rollupjs.org/). ESM format is designed to be statically analyzable so the bundlers can take advantage of that to perform "tree-shaking" and eliminate unused code from your final bundle. The default file for these bundlers (`pkg.module`) is the Runtime only ES Module build (`vue-i18n.esm.js`).
+  - ESM for browsers (8.11+ only, `vue-i18n.esm.browser.js`): intended for direct imports in modern browsers via `<script type="module">`.
diff --git a/package.json b/package.json
@@ -61,8 +61,8 @@
     "rollup-plugin-replace": "^2.0.0",
     "selenium-server": "2.53.1",
     "sinon": "^2.1.0",
+    "terser": "^3.17.0",
     "typescript": "^2.4.1",
-    "uglify-js": "^2.7.5",
     "vue": "^2.5.17",
     "vue-template-compiler": "^2.5.17",
     "vuepress": "^0.14.0",

diff --git a/vuepress/installation.md b/vuepress/installation.md
@@ -65,3 +65,22 @@ cd node_modules/vue-i18n
 npm install # or `yarn`
 npm run build  # or `yarn run build`
 ```
+
+## Explanation of Different Builds
+
+In the dist/ [directory of the NPM package](https://cdn.jsdelivr.net/npm/vue-i18n/dist/) you will find many different builds of VueI18n. Here’s an overview of the difference between them:
+
+- UMD: `vue-i18n.js`
+- CommonJS: `vue-i18n.common.js`
+- ES Module for bundlers: `vue-i18n.esm.js`
+- ES Module for browsers: `vue-i18n.esm.browser.js`
+
+### Terms
+
+- **[UMD](https://github.com/umdjs/umd)**: UMD builds can be used directly in the browser via a `<script>` tag. The default file from Unpkg CDN at [https://unpkg.com/vue-i18n](https://unpkg.com/vue-i18n) is the UMD build (`vue-i18n.js`).
+
+- **[CommonJS](http://wiki.commonjs.org/wiki/Modules/1.1)**: CommonJS builds are intended for use with older bundlers like [browserify](http://browserify.org/) or [webpack 1](https://webpack.github.io). The default file for these bundlers (`pkg.main`) is the Runtime only CommonJS build (`vue-i18n.common.js`).
+
+- **[ES Module](http://exploringjs.com/es6/ch_modules.html)**: starting in 8.11 VueI18n provides two ES Modules (ESM) builds:
+  - ESM for bundlers: intended for use with modern bundlers like [webpack 2](https://webpack.js.org) or [Rollup](https://rollupjs.org/). ESM format is designed to be statically analyzable so the bundlers can take advantage of that to perform "tree-shaking" and eliminate unused code from your final bundle. The default file for these bundlers (`pkg.module`) is the Runtime only ES Module build (`vue-i18n.esm.js`).
+  - ESM for browsers (8.11+ only, `vue-i18n.esm.browser.js`): intended for direct imports in modern browsers via `<script type="module">`.
diff --git a/yarn.lock b/yarn.lock
@@ -1871,15 +1871,6 @@ algoliasearch@^3.24.5:
     semver "^5.1.0"
     tunnel-agent "^0.6.0"
 
-align-text@^0.1.1, align-text@^0.1.3:
-  version "0.1.4"
-  resolved "https://registry.yarnpkg.com/align-text/-/align-text-0.1.4.tgz#0cd90a561093f35d0a99256c22b7069433fad117"
-  integrity sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=
-  dependencies:
-    kind-of "^3.0.2"
-    longest "^1.0.1"
-    repeat-string "^1.5.2"
-
 alphanum-sort@^1.0.1, alphanum-sort@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/alphanum-sort/-/alphanum-sort-1.0.2.tgz#97a1119649b211ad33691d9f9f486a8ec9fbe0a3"
@@ -2939,11 +2930,6 @@ camelcase-keys@^4.0.0:
     map-obj "^2.0.0"
     quick-lru "^1.0.0"
 
-camelcase@^1.0.2:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-1.2.1.tgz#9bb5304d2e0b56698b2c758b08a3eaa9daa58a39"
-  integrity sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=
-
 camelcase@^2.0.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-2.1.1.tgz#7c1d16d679a1bbe59ca02cacecfb011e201f5a1f"
@@ -2989,14 +2975,6 @@ caseless@~0.12.0:
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
   integrity sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=
 
-center-align@^0.1.1:
-  version "0.1.3"
-  resolved "https://registry.yarnpkg.com/center-align/-/center-align-0.1.3.tgz#aa0d32629b6ee972200411cbd4461c907bc2b7ad"
-  integrity sha1-qg0yYptu6XIgBBHL1EYckHvCt60=
-  dependencies:
-    align-text "^0.1.3"
-    lazy-cache "^1.0.3"
-
 chai-nightwatch@~0.1.x:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/chai-nightwatch/-/chai-nightwatch-0.1.1.tgz#1ca56de768d3c0868fe7fc2f4d32c2fe894e6be9"
@@ -3148,15 +3126,6 @@ clipboardy@^1.2.2:
     arch "^2.1.0"
     execa "^0.8.0"
 
-cliui@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/cliui/-/cliui-2.1.0.tgz#4b475760ff80264c762c3a1719032e91c7fea0d1"
-  integrity sha1-S0dXYP+AJkx2LDoXGQMukcf+oNE=
-  dependencies:
-    center-align "^0.1.1"
-    right-align "^0.1.1"
-    wordwrap "0.0.2"
-
 cliui@^4.0.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/cliui/-/cliui-4.1.0.tgz#348422dbe82d800b3022eef4f6ac10bf2e4d1b49"
@@ -4090,7 +4059,7 @@ decamelize-keys@^1.0.0:
     decamelize "^1.1.0"
     map-obj "^1.0.0"
 
-decamelize@^1.0.0, decamelize@^1.1.0, decamelize@^1.1.2, decamelize@^1.2.0:
+decamelize@^1.1.0, decamelize@^1.1.2, decamelize@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
   integrity sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=
@@ -7304,11 +7273,6 @@ latest-version@^3.0.0:
   dependencies:
     package-json "^4.0.0"
 
-lazy-cache@^1.0.3:
-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/lazy-cache/-/lazy-cache-1.0.4.tgz#a1d78fc3a50474cb80845d3b3b6e1da49a446e8e"
-  integrity sha1-odePw6UEdMuAhF07O24dpJpEbo4=
-
 lazystream@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/lazystream/-/lazystream-1.0.0.tgz#f6995fe0f820392f61396be89462407bb77168e4"
@@ -7656,11 +7620,6 @@ lolex@^1.6.0:
   resolved "https://registry.yarnpkg.com/lolex/-/lolex-1.6.0.tgz#3a9a0283452a47d7439e72731b9e07d7386e49f6"
   integrity sha1-OpoCg0UqR9dDnnJzG54H1zhuSfY=
 
-longest@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/longest/-/longest-1.0.1.tgz#30a0b2da38f73770e8294a0d22e6625ed77d0097"
-  integrity sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=
-
 loose-envify@^1.0.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.4.0.tgz#71ee51fa7be4caec1a63839f7e682d8132d30caf"
@@ -10208,13 +10167,6 @@ rfdc@^1.1.2:
   resolved "https://registry.yarnpkg.com/rfdc/-/rfdc-1.1.2.tgz#e6e72d74f5dc39de8f538f65e00c36c18018e349"
   integrity sha512-92ktAgvZhBzYTIK0Mja9uen5q5J3NRVMoDkJL2VMwq6SXjVCgqvQeVP2XAaUY6HT+XpQYeLSjb3UoitBryKmdA==
 
-right-align@^0.1.1:
-  version "0.1.3"
-  resolved "https://registry.yarnpkg.com/right-align/-/right-align-0.1.3.tgz#61339b722fe6a3515689210d24e14c96148613ef"
-  integrity sha1-YTObci/mo1FWiSENJOFMlhSGE+8=
-  dependencies:
-    align-text "^0.1.1"
-
 rimraf@2.6.3, rimraf@^2.2.8, rimraf@^2.5.4, rimraf@^2.6.0, rimraf@^2.6.1, rimraf@^2.6.2:
   version "2.6.3"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.3.tgz#b2d104fe0d8fb27cf9e0a1cda8262dd3833c6cab"
@@ -10757,7 +10709,7 @@ source-map@0.5.6:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.6.tgz#75ce38f52bf0733c5a7f0c118d81334a2bb5f412"
   integrity sha1-dc449SvwczxafwwRjYEzSiu19BI=
 
-source-map@^0.5.0, source-map@^0.5.1, source-map@^0.5.3, source-map@^0.5.6, source-map@^0.5.7, source-map@~0.5.1:
+source-map@^0.5.0, source-map@^0.5.1, source-map@^0.5.3, source-map@^0.5.6, source-map@^0.5.7:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
   integrity sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=
@@ -11278,7 +11230,7 @@ terser-webpack-plugin@^1.1.0:
     webpack-sources "^1.1.0"
     worker-farm "^1.5.2"
 
-terser@^3.16.1:
+terser@^3.16.1, terser@^3.17.0:
   version "3.17.0"
   resolved "https://registry.yarnpkg.com/terser/-/terser-3.17.0.tgz#f88ffbeda0deb5637f9d24b0da66f4e15ab10cb2"
   integrity sha512-/FQzzPJmCpjAH9Xvk2paiWrFq+5M6aVOf+2KRbwhByISDX/EujxsK+BAvrhb6H+2rtrLCHK9N01wO014vrIwVQ==
@@ -11564,16 +11516,6 @@ uglify-js@3.4.x:
     commander "~2.19.0"
     source-map "~0.6.1"
 
-uglify-js@^2.7.5:
-  version "2.8.29"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.8.29.tgz#29c5733148057bb4e1f75df35b7a9cb72e6a59dd"
-  integrity sha1-KcVzMUgFe7Th913zW3qcty5qWd0=
-  dependencies:
-    source-map "~0.5.1"
-    yargs "~3.10.0"
-  optionalDependencies:
-    uglify-to-browserify "~1.0.0"
-
 uglify-js@^3.1.4:
   version "3.5.2"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.5.2.tgz#dc0c7ac2da0a4b7d15e84266818ff30e82529474"
@@ -11582,11 +11524,6 @@ uglify-js@^3.1.4:
     commander "~2.19.0"
     source-map "~0.6.1"
 
-uglify-to-browserify@~1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz#6e0924d6bda6b5afe349e39a6d632850a0f882b7"
-  integrity sha1-bgkk1r2mta/jSeOabWMoUKD4grc=
-
 ultron@~1.1.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/ultron/-/ultron-1.1.1.tgz#9fe1536a10a664a65266a1e3ccf85fd36302bc9c"
@@ -12295,16 +12232,6 @@ widest-line@^2.0.0:
   dependencies:
     string-width "^2.1.1"
 
-window-size@0.1.0:
-  version "0.1.0"
-  resolved "https://registry.yarnpkg.com/window-size/-/window-size-0.1.0.tgz#5438cd2ea93b202efa3a19fe8887aee7c94f9c9d"
-  integrity sha1-VDjNLqk7IC76Ohn+iIeu58lPnJ0=
-
-wordwrap@0.0.2:
-  version "0.0.2"
-  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.2.tgz#b79669bb42ecb409f83d583cad52ca17eaa1643f"
-  integrity sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8=
-
 wordwrap@^1.0.0, wordwrap@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"
@@ -12585,16 +12512,6 @@ yargs@^12.0.5:
     y18n "^3.2.1 || ^4.0.0"
     yargs-parser "^11.1.1"
 
-yargs@~3.10.0:
-  version "3.10.0"
-  resolved "https://registry.yarnpkg.com/yargs/-/yargs-3.10.0.tgz#f7ee7bd857dd7c1d2d38c0e74efbd681d1431fd1"
-  integrity sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=
-  dependencies:
-    camelcase "^1.0.2"
-    cliui "^2.1.0"
-    decamelize "^1.0.0"
-    window-size "0.1.0"
-
 yauzl@2.4.1:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/yauzl/-/yauzl-2.4.1.tgz#9528f442dab1b2284e58b4379bb194e22e0c4005"