plrplr

qqq_day6

```js //获取元素 let box=document.querySelector('.box'); ```

ddayy

```js const fs=require('fs'); const ReadFile=(path)=>{ let fil=fs.readFileSync(path,'utf-8'); fs.stat('path',(err,data)=>{ console.log('当前文件的大小为'+data.size); }) } ReadFile('txt.html');

calculatte

```js let num=(time,val)=>{ return new Promise(resolve,reject)=>{ setTimeout(()=>{ console.log(val); resolve(); },time) } } num(1000,'1').then(()=>{ num(