Front-end-learning-to-organize-notes
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Published
20 hours ago •
Chocolate1999
Chocolate1999
问如何改造，才能实现打印0 1 2 3，闭包可以吗，然后用闭包实现一下这个效果
for (var i = 0; i < 4; i++) { setTimeout(function() { console.log(i); }, 300); }
for(var i=0;i<4;i++){
((j)=>{
setTimeout(function(){
console.log(j)//0~3
},300)
})(i)
}