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let pendingCallbacks: Array<(time: number) => void> = []
/**
* requestAnimationFrame that also works on non-browser environments like Node.
*/
export const raf = typeof requestAnimationFrame === 'function'
? requestAnimationFrame
: (fn: (time: number) => void) => {
if (!pendingCallbacks.length) {
setImmediate(() => {
const now = performance.now()
const cbs = pendingCallbacks
// in case cbs add new callbacks
pendingCallbacks = []
cbs.forEach(cb => cb(now))
})
}
pendingCallbacks.push(fn)
}
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