raf.js 中 setTimeout 100 / 60 问题？网上资料都是 16.7 = 1000 / 60, 即每秒60帧，IScroll 也是这样。

[proc07]

const DEFAULT_INTERVAL = 100 / 60

export const requestAnimationFrame = (() => { return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || // if all else fails, use setTimeout function (callback) { return window.setTimeout(callback, (callback.interval || DEFAULT_INTERVAL) / 2) // make interval as precise as possible. } })()

[ustbhuangyi]

其实并没有影响，即使你写 setTimeout(0)，也会至少在一个 Tick（约为 17ms）后才会执行回调