for循环里面定时器打印一直最后一个

Question

for(var i=0;i<10;i++){

setTimeout(function(){

    console.log(i)

},i*1000)

}

这样一直打印10

我知道用let可以

其他的写法帮忙写下 比如闭包 递归

Answer 1

闭包：for (var i = 0; i < 10; i++) {&nbsp; &nbsp; (function(j) {&nbsp; &nbsp; &nbsp; &nbsp; setTimeout(function() {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; console.log(j);&nbsp; &nbsp; &nbsp; &nbsp; }, j * 1000)&nbsp; &nbsp; })(i);}