How to extract third-party libraries using webpack
This article mainly introduces the correct posture of webpack to extract third-party libraries. There are two commonly used methods to extract third-party libraries. This article introduces these two methods in detail. Those who are interested can learn more
When we use webpack to package, we often want to extract the third-party library separately, use it as a stable version file, and use the browsing cache to reduce the number of requests. There are two commonly used methods to extract third-party libraries
CommonsChunkPlugin
DLLPlugin
The difference : The first method requires the third-party library to be run and packaged once every time it is packaged. The second method only packages the project files each time. We only need to quote the third-party compressed file that was packaged for the first time.
CommonsChunkPlugin method introduction
Let’s take vue as an example
const vue = require('vue')
{
entry: {
// bundle是我们要打包的项目文件的导出名字， app是入口js文件
bundle: 'app'，
// vendor就是我们要打包的第三方库最终生成的文件名，数组里是要打包哪些第三方库, 如果不是在node——modules里面，可以填写库的具体地址
vendor: ['vue']
},
output: {
path: __dirname + '/bulid/',
// 文件名称
filename: '[name].js'
},
plugins: {
// 这里实例化webpack.optimize.CommonsChunkPlugin构造函数
// 打包之后就生成vendor.js文件
new webpack.optimize.CommonsChunkPlugin('vendor', 'vendor.js')
}
}Then package the generated file and introduce it into the html file
<script src="/build/vendor.js"></script> <script src="/build/bundle.js"></script>
DLLPlugin method Introduction
First prepare two files
webpack.config.js
- ##webpack.dll.config. js
const webpack = require('webpack')
const library = '[name]_lib'
const path = require('path')
module.exports = {
entry: {
vendors: ['vue', 'vuex']
},
output: {
filename: '[name].dll.js',
path: 'dist/',
library
},
plugins: [
new webpack.DllPlugin({
path: path.join(__dirname, 'dist/[name]-manifest.json'),
// This must match the output.library option above
name: library
}),
],
}const webpack = require('webpack')
module.exports = {
entry: {
app: './src/index'
},
output: {
filename: 'app.bundle.js',
path: 'dist/',
},
plugins: [
new webpack.DllReferencePlugin({
context: __dirname,
manifest: require('./dist/vendors-manifest.json')
})
]
}$ webpack --config webpack.dll.config.js $ webpack --config webpack.config.js
<script src="/dist/vendors.dll.js"></script> <script src="/dist/app.bundle.js"></script>
JavaScript module optimization
How to use webpack express to achieve multi-page site development
Webpack framework (mastering core technology)
How to control multiple scroll bars to scroll synchronously using JS
Use vue-cli How webpack builds vue
The above is the detailed content of How to extract third-party libraries using webpack. For more information, please follow other related articles on the PHP Chinese website!
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