this.countDown = 10
let intval = setInterval(() => {
if(this.countDown === 0) {
clearInterval(intval)
return
}
this.countDown --
}, 1000)
this.countDown = 10
let intval = setInterval(() => {
if(this.countDown === 0) {
clearInterval(intval)
return
}
this.countDown --
}, 1000)
直接上代碼 <script type="text/javascript"> let array = [1, 22, 13, 7, 2, 224, 354, 5, 3, 6] //sort排序
直接上代碼 <script> let arr = [2, 3, 4, 4, 6, 66, 4, 743, 243, 22, 2, 4]; // 一、遍歷數組法,新建一個數組,遍歷原數組,如果不存