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轮播图中的一个疑问 #4

@zzjd

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@zzjd

请问轮播图JS代码中
for(var i = 0; i < 4; i++){
(function (j) {
li[j].addEventListener('click',function () {
clearInterval(timer);
index = j;
moveTo(index);
timer = setInterval(disPlay,2000);
})
}(i))
}
应该如何理解呢?j是如何来的,以及“(i)”的意义是什么呢?

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