webpack 允许使用任意语言定义配置文件。文件扩展支持列表 node-interpret 包中找到。webpack 将通过你选择的语言运行你的配置。
例如，如果你使用 coffeescript，你的文件将如下所示：
webpack.config.coffee
HtmlWebpackPlugin = require('html-webpack-plugin')
webpack = require('webpack')
path = require('path')
config =
entry: './path/to/my/entry/file.js'
output:
path: path.resolve(__dirname, 'dist')
filename: 'my-first-webpack.bundle.js'
module: rules: [ {
test: /\.(js|jsx)$/
use: 'babel-loader'
} ]
plugins: [
new (webpack.optimize.UglifyJsPlugin)
new HtmlWebpackPlugin(template: './src/index.html')
]
module.exports = config
>> loader settings, e.g. sassLoader, eslint sections
原文：https://webpack.js.org/configuration/external-configs/
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