ES Modules (closes #179, closes #414) (#404)

* Converts to ES6 to enable tree-shaking

* Updates index.js to ES6

* Adds `babel-plugin-add-module-exports` for backward compatibility

* Modify index.js generator

* Convert functions to es6 import/export format

* Add examples

* Update stuff

* Update webpack 2.0 in examples

* Install gzip-size-cli and pretty-bytes-cli to examples

* Fix browserify example

* Update examples READMEs

* Move build-index at the end of release.sh

* Add names in jsDocs

* Fix build-docs

* Regenerate docs

* Add smoke test

* Rebuild index.js

* Fix version of phantomjs

* Add more examples

* Modify flow typings generator to include aliases in all typings

* Modify build_index to generate es and non-es indices

* Generate TypeScript typings for es

.babelrc

@@ -1,3 +1,4 @@
 {
-  "presets": ["es2015"]
+  "presets": ["es2015", "babel-preset-power-assert"],
+  "plugins": ["add-module-exports"]
 }

.flowconfig

@@ -1,4 +1,5 @@
 [ignore]
 .*node_modules*
+.*examples*
 [options]
 suppress_comment= \\(.\\|\n\\)*\\$ExpectedMistake

.gitignore

@@ -1,7 +1,6 @@
 node_modules
-npm-debug.log
+npm-debug.log*
 tmp
-dist/compressed
-test.espowered.js
+dist
 .envrc
-.idea/
+/.idea/

config/webpack.js

@@ -7,7 +7,7 @@ var config = {
   output: getOutputConfig(),
   module: {
     loaders: [
-      {test: /\.js$/, loader: 'webpack-espower', exclude: /node_modules/},
+      {test: /\.js$/, exclude: /node_modules/, loaders: ['babel']},
       {test: /\.json$/, loader: 'json'}
     ]
   }

examples/babel/.babelrc

@@ -0,0 +1,4 @@
+{
+  "presets": ["es2015"],
+  "plugins": ["date-fns"]
+}

examples/babel/README.md

@@ -0,0 +1,23 @@
+# Usage With webpack 1.x
+
+See [example.js](./example.js) for source code example.
+
+See [package.json scripts](./package.json) for CLI usage.
+
+## Build Example
+
+```sh
+yarn
+yarn run build
+```
+
+See ./dist for output.
+
+## Minimal Build Size
+
+You can see minimal build size (when you use just one function):
+
+```sh
+gzip-size dist/example.min.js | pretty-bytes
+#=> 4.07 kB
+```

examples/babel/example.js

@@ -0,0 +1,4 @@
+import {format} from 'date-fns'
+
+const result = format('2017-01-25T21:28:15.000Z', 'DD.MM.YYYY HH:mm:ss')
+console.log(result === '25.01.2017 21:28:15')

examples/babel/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "date-fns-example-babel",
+  "version": "0.1.0",
+  "description": "Example of date-fns usage with webpack 1.x, babel and babel-plugin-date-fns",
+  "main": "example.js",
+  "author": "Sasha Koss <koss@nocorp.me>",
+  "license": "MIT",
+  "dependencies": {
+    "babel-core": "^6.22.1",
+    "babel-plugin-date-fns": "^0.1.0",
+    "babel-preset-babili": "^0.0.11",
+    "babel-preset-es2015": "^6.22.0",
+    "babili": "^0.0.11",
+    "gzip-size-cli": "^1.0.0",
+    "pretty-bytes-cli": "^2.0.0",
+    "webpack": "1"
+  },
+  "scripts": {
+    "build": "yarn run build-date-fns && yarn run build-webpack && yarn run build-babili",
+    "build-date-fns": "env PACKAGE_OUTPUT_PATH=\"$(pwd)/node_modules/date-fns\" ../../scripts/build_package.sh",
+    "build-webpack": "webpack",
+    "build-babili": "babili dist/example.js --out-file dist/example.min.js --minified --no-comments && yarn run stats-size",
+    "stats-size": "gzip-size dist/example.min.js | pretty-bytes",
+    "test": "test $(env TZ=UTC node ./dist/example.min.js) = true"
+  }
+}

examples/babel/webpack.config.js

@@ -0,0 +1,14 @@
+module.exports = {
+  entry: './example.js',
+  output: {
+    path: './dist',
+    filename: 'example.js'
+  },
+  module: {
+    loaders: [{
+      test: /\.js$/,
+      exclude: /node_modules/,
+      loader: 'babel-loader'
+    }]
+  }
+}