Basic module to simply throttle a function call

throttler.js

define([], function() {
    /**
     * Throttler.
     *
     * @param {Number} delay The delay.
     */
    function Throttler(delay) {
        this.delay = delay || 300;
        this.timeout = null;
        this.time = new Date();
    }

    Throttler.prototype.cancel = function() {
        clearTimeout(this.timeout);
    };

    Throttler.prototype.schedule = function(callback) {
        var now = new Date();
        if (this.time.getTime() + this.delay > now) {
            clearTimeout(this.timeout);
        }

        this.time = now;
        this.timeout = setTimeout(callback, this.delay);
    };

    return Throttler;
});