How to deal with the package file size is too large

This time I will show you how to deal with a packaged file that is too large in size. What are the precautions for handling a packaged file that is too large? The following is a practical case, let’s take a look.

Optimization comparison:

Before optimization: index.html introduces a main.js file with a size of more than 2M.

After optimization: index.html introduces main.js, commons.js, charts.js, and other.js. In order to achieve the purpose of dividing main.js equally. Each file is controlled within 300k. (If you are happy, 100k is no problem)

A bunch of libraries and tools used:

vue, webpack, babel, highcharts, echarts, jquery, html2canvas****** I will omit some m codes here

Problem:

After using webpack in the development environment, I found a single js file of 5m.

The production environment is reduced to 2m with the help of vue-cli's webpack configuration.

Solution:

Search various solutions: require.ensure, require dependency, multiple entries, commonsChunkPlugin****Here are some solutions to save effort

There are too many solutions similar to the ones below, but they all fail to achieve the expected results

entry:{ 
 main:'xxx.js',
  chunks:['c1', 'c2'],
  commons:['jquery', 'highcharts', 'echarts','d3', 'xxxxx.js']  
}
 
plugins:{
new commonsChunkPlugin({
name:'commons',
minChunks:2
})  
}

Optimal solution:

entry:{ 
 main:'xxx.js'
}
 
plugins:{
 new commonsChunkPlugin({
 name:'commons',
 minChunks:function(module){
  // 下边return参考的vue-cli配置
  // any required modules inside node_modules are extracted to vendor
  return (
   module.resource &&
   /\.js$/.test(module.resource) &&
   module.resource.indexOf(
   path.join(__dirname, '../node_modules')
   ) === 0
  )
 }
}) ,
// 以下才是关键
new commonsChunkPlugin({
 name:'charts',
 chunks:['commons'] 
 minChunks:function(module){
  return (
   module.resource &&
   /\.js$/.test(module.resource) &&
   module.resource.indexOf(
   path.join(__dirname, '../node_modules')
   ) === 0 && ['jquery.js', 'highcharts.js','echarts'].indexOf( module.resource.substr(module.resource.lastIndexOf('/')+1).toLowerCase() ) != -1
  )
 }
}) // 如果愿意，可以再new 一个commonsChunkPlugin
 
}

I believe you have mastered it after reading the case in this article Method, for more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

Vue component makes infinite multi-select menu

Install nodejs, npm and cnpm in Mac

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