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var _ = require('underscore'); | |
_.throttle2 = function(func, wait, options) { | |
var context, args, result; | |
var timeout = null; | |
var previous = 0; | |
options || (options = {}); | |
var later = function() { | |
previous = options.leading === false ? 0 : Date.now(); | |
timeout = null; | |
result = func.apply(context, args); | |
}; | |
return function() { | |
var now = Date.now(); | |
if (!previous && options.leading === false) previous = now; | |
var remaining = wait - (now - previous); | |
context = this; | |
args = arguments; | |
if (remaining <= 0) { | |
clearTimeout(timeout); | |
timeout = null; | |
previous = now; | |
result = func.apply(context, args); | |
} else if (!timeout && options.trailing !== false) { | |
timeout = setTimeout(later, remaining); | |
} | |
return result; | |
}; | |
}; | |
var throttled = _.throttle2(function() { | |
var foo = Math.random(); | |
}, 333); | |
var i; | |
var tick = function tick(time) { | |
for (i = 0; i<=1000; i++) { | |
throttled(); | |
} | |
requestAnimationFrame(tick); | |
}; | |
requestAnimationFrame(tick); |
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