懂车帝

• 拷打实习经历
• 拷打每个比赛
• css 三栏布局
• 垂直居中
• js 闭包

const func = () => {
    let j = 0
    return () => {
        j++
        console.log(j)
    }
}
func1 = func()
func2 = func()

func1()
func2()
func1()
func2()
func1 === func2

[] == []
[] === []

• 防抖节流实现
• 作用域

var a = 10;
function AA() {
  console.log(a);
  var a = 20;
}
AA();

• 跨域
• jsonp 实现

fetchJsonp(url) {
    let script = document.createElement('script')
    script.setAttribute('src', `${url}&callback=cb`)
    return new Promise((resolve, reject) => {
        cb = (res) => {
            resolve(res)
        }
    })
}