1. const fs = require('fs')
    2. const filePath = '../component/twoEggs/index.vue'
    4. function replace (str) {
    5.     var reg = /.?(\d)+(\.\d+)?(rem)/gi
    6.     var arr = str.match(reg)
    7.     for (let i = 0, len = arr.length; i < len; i++) {
    8.         const item = arr[i]
    9.         const num = Number(item.slice(0, item.length - 3))
    10.         let replaceNum = num * 20000 / 100 + 'px'
    11.         if (arr[i].length <= replaceNum.length) {
    12.             replaceNum = ` ${replaceNum} `
    13.         }
    14.         str = str.replace(arr[i], replaceNum)
    15.     }
    16.     return str
    17. }
    19. fs.readFile(filePath, 'utf8', (err, data) => {
    20.     if (err) throw err
    21.     const formatData = replace(data)
    22.     fs.writeFile(filePath, formatData, 'utf8', (err) => {
    23.         if (err) throw err
    24.         console.log('文件已保存')
    25.     })
    26. })