Add this plugin to generate mirrored esm modules for your existing bundles
MIT License
Add this plugin to generate mirrored esm modules for your existing bundles. You may use these bundles in module/nomodule
in your web-app and ship less transpiled code to your users.
Works with Webpack4 and Babel7
npm i -D babel-esm-plugin
This plugin only works when you're already using babel-preset-env
.
Also, there is an expectation that your babel-preset-env
is configured in the shape:
{
use: {
loader: 'babel-loader',
options: {
"presets": [["@babel/preset-env", {
"targets": {
"browsers": ["last 2 versions", "safari >= 7"]
}
....
}]]
},
},
}
new BabelEsmPlugin({
filename: '[name].es6.js',
chunkFilename: '[id].es6.js',
excludedPlugins: [...],
additionalPlugins: [...],
beforeStartExecution: function(plugins, babelConfig) {}
});
filename
: Output name of es6 bundles. (default: '[name].es6.js')chunkFilename
: Output name of es6 chunks. (default: '[id].es6.js')excludedPlugins
: List of plugins you want to exclude from generating es6 bundles.additionalPlugins
: List of plugins you want to add while generating es6 bundles.beforeStartExecution
: A callback function which passes all plugins and the new babel config, to a function where the user can modify them before starting the ESM
build.A usual output from webpack output looks like this:
With this plugin added, you will be generating es6 outputs:
const BabelEsmPlugin = require('babel-esm-plugin');
module.exports = {
entry: {
index: './index.js',
home: './index2.js'
},
output: {
filename: "[name].js"
},
module: {
rules: [
{
test: /\.js$/,
exclude: /(node_modules|bower_components)/,
use: {
loader: 'babel-loader',
options: {
"presets": [["@babel/preset-env", {
"targets": {
"browsers": ["last 2 versions", "safari >= 7"]
}
}]]
},
},
}
]
},
plugins: [
new BabelEsmPlugin()
]
}