The steps-based animation that people try to use with setInterval code just ends up looking jerky.

用 setInterval 代码实现基于步骤的动画看起来有些抖动。

youdao

var id = setInterval(fn, delay); - Similar to setTimeout but continually calls the function (with a delay every time) until it is canceled.

var id = setInterval(fn delay); - 与setTimeout类似，只不过它会持续地调用指定的函数（每次都有一个延时），直到timer被取消为止。

youdao