Wait for seconds

wait_for_seconds.js

var waitSeconds = function (seconds) {
    if (waitSeconds.promise) {
        return waitSeconds.promise;
    }

    var defer = $.Deferred();

    setTimeout(function () {
        defer.resolve();
    }, 1000 * seconds);

    var promise = defer.promise();
    waitSeconds.promise = promise;

    return promise;
};

/**
 * usage:
 * var fiveSeconds = waitSeconds(5);
 * fiveSeconds.then(function () {
 *   console.log('5 seconds left');   
 * });
 */