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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
/**
* Create a debouncing function wrapper to only call the target function after a certain
* amount of time has passed without it being called.
*
* @param {Function} func
* The function to debounce
* @param {number} wait
* The wait period
* @param {Object} scope
* The scope to use for func
* @return {Function} The debounced function, which has a `cancel` method that the
* consumer can call to cancel any pending setTimeout callback.
*/
exports.debounce = function (func, wait, scope) {
let timer = null;
function clearTimer(resetTimer = false) {
if (timer) {
clearTimeout(timer);
}
if (resetTimer) {
timer = null;
}
}
const debouncedFunction = function () {
clearTimer();
const args = arguments;
timer = setTimeout(function () {
timer = null;
func.apply(scope, args);
}, wait);
};
debouncedFunction.cancel = clearTimer.bind(null, true);
return debouncedFunction;
};
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