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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | 1x 7x 9x 7x 7x 7x 14x 14x 9x 7x 2x 2x 7x | const rafThrottle = callback => { let requestId = null let lastArgs const later = (context) => () => { requestId = null callback.apply(context, lastArgs) } const throttled = function(...args) { lastArgs = args; if (requestId === null) { requestId = requestAnimationFrame(later(this)) } } throttled.cancel = () => { cancelAnimationFrame(requestId) requestId = null } return throttled } export default rafThrottle |