This time I will show you how to package the specified JS file with webpack. What are the precautions for packaging the specified JS file with webpack? The following is a practical case, let's take a look.
Background
Recently received a request, because the back-end IP accessed by the printed front-end package is not sure, and it is necessary to check the IP in the projectCommonsChunkPlugin
module.exports = { entry: { app: APP_FILE // 入口文件 }, output: { publicPath: './dist/', //输出目录,index.html寻找资源的地址 path: BUILD_PATH, // 打包目录 filename: '[name].[chunkhash].js', // 输出文件名 chunkFilename: '[name].[chunkhash].js' // commonChunk 输出文件 } }
Digression
{
Let’s talk about publicPath first. There is a point to note here, that is, the path is written as ./dist relative path. If you write an absolute path like /dist/, one drawback is that when nginx does not place the front-end package in the root directory, index.html will fail to access the resource. Therefore, it is recommended to write a relative path, but when using a relative path, there will be a potential problem, that is, if the routing access of the project itself is in HTML5 mode instead of using hash (there is a # sign on the routing), then the project will still be accessed. Deployment failed. Angular and React will have such problems. I have never used Vue, so it should be similar. The solution at this time is to add the base tag in the head of index.html, that is:<head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"/> <base href="/" rel="external nofollow" > </head>
}
webpack itself is based onentry: { app: APP_FILE // 入口文件 ip: IP_FILE },
new webpack.optimize.CommonsChunkPlugin({name: 'ip', minChunks: Infinity}),
CopyWebpackPlugin
The final solution is to separate the ip.js file from the modularization of the project, and then in index.html quoted separately. (This was the solution I thought of at the beginning, but it was not the solution I wanted, but I had no choice but to have limited knowledge and did not solve the previous problem).Solution process:
First introduce CopyWebpackPlugin in webpack, configuration code:new CopyWebpackPlugin([ {from: './src/config/ip.js', to: 'ip.js'}, ])
<script> document.write("<s"+"cript type='text/javascript' src='./dist/ip.js?"+Math.random().toString(36).substr(2)+"'></scr"+"ipt>"); </script>
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