throttle.js•733 B
"use strict";
var callable = require("es5-ext/object/valid-callable")
, validTimeout = require("./valid-timeout")
, apply = Function.prototype.apply;
module.exports = function (fn, timeout) {
var isScheduled = false, context, args, run;
callable(fn);
timeout = validTimeout(timeout);
run = function () {
var currentContext = context, currentArgs = args;
if (!args) {
isScheduled = false;
return;
}
context = null;
args = null;
setTimeout(run, timeout);
apply.call(fn, currentContext, currentArgs);
};
return function () {
if (isScheduled) {
context = this;
args = arguments;
return;
}
isScheduled = true;
setTimeout(run, timeout);
apply.call(fn, this, arguments);
};
};