setTimeout()和setInterval()的区别

最新推荐文章于 2020-07-18 18:30:13 发布

inotgaoshou

最新推荐文章于 2020-07-18 18:30:13 发布

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本文详细探讨了JavaScript中setTimeout与setInterval的使用场景。setTimeout适用于有明确开始和结束的动画，而setInterval则更适合用于无限期运行的动画，直到用户进行干预。

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setTimeout or setInterval?

Why do I use setTimeout, not setInterval? In my opinion, the two methods, though similar, are meant for different situations, especially when it comes to animations. Before continuing, let's review the difference:

setTimeout('theFunction()',100);
setInterval('theFunction()',100);

The first line means "Execute function theFunction() 100 milliseconds from now." The second line means "Execute function theFunction() 100 milliseconds from now, and continue executing it every 100 milliseconds."

setInterval is best for animations that continue for an indefinite time (for instance, until the user does something). setTimeout, on the other hand, is best suited for animations that have a fixed start and end point.