1、需求

实现一个输出文件夹大小的plugin；

2、配置插件

2.1 引入插件

2.2 实例化插件

3、插件源码

const { statSync } = require('fs')
const { resolve } = require('path')
class BundleSizePlugin {
  constructor(options) {
    this.options = options;
  }
  apply(compiler) {
    const { limit } = this.options
    compiler.hooks.done.tap('BundleSizePlugin', (stats) => {
      const { path } = stats.compilation.outputOptions
      const bundlePath = resolve(path)
      const { size } = statSync(bundlePath)
      const bundleSize = size
      if (bundleSize < limit) {
        console.log('输出success-------bundleSize:', bundleSize, "\n limit:", limit, '小于限制大小')
      } else {
        console.error('输出error-------bundleSize:', bundleSize, "\n limit:", limit, '超出了限制大小')
      }
    })
  }
}
module.exports = BundleSizePlugin

4、实现效果