- 我们约定最后一个参数为回调函数
npm i cb2pro
var fs = require('fs')
var cb2promise = require('cb2pro')
var newFs = cb2promise(fs, {}, ['readFile', 'writeFile'])
newFs.writeFile('./message.md', 'hello jarvis').then(err => {
err ? console.error(err) : console.log('success')
})
newFs.readFile('./message.md').then((data) => {
console.log(data.toString())
})