1 /*

     2 YUI 3.10.3 (build 2fb5187)

     3 Copyright 2013 Yahoo! Inc. All rights reserved.

     4 Licensed under the BSD License.

     5 http://yuilibrary.com/license/

     6 */

     7 

     8 YUI.add('yui-throttle', function (Y, NAME) {

     9 

    10 /**

    11 Throttles a call to a method based on the time between calls. This method is attached

    12 to the `Y` object and is <a href="../classes/YUI.html#method_throttle">documented there</a>.

    13 

    14     var fn = Y.throttle(function() {

    15         counter++;

    16     });

    17 

    18     for (i; i< 35000; i++) {

    19         out++;

    20         fn();

    21     }

    22 

    23 

    24 @module yui

    25 @submodule yui-throttle

    26 */

    27 

    28 /*! Based on work by Simon Willison: http://gist.github.com/292562 */

    29 /**

    30  * Throttles a call to a method based on the time between calls.

    31  * @method throttle

    32  * @for YUI

    33  * @param fn {function} The function call to throttle.

    34  * @param ms {int} The number of milliseconds to throttle the method call.

    35  * Can set globally with Y.config.throttleTime or by call. Passing a -1 will

    36  * disable the throttle. Defaults to 150.

    37  * @return {function} Returns a wrapped function that calls fn throttled.

    38  * @since 3.1.0

    39  */

    40 Y.throttle = function(fn, ms) {

    41     ms = (ms) ? ms : (Y.config.throttleTime || 150);

    42 

    43     if (ms === -1) {

    44         return function() {

    45             fn.apply(this, arguments);

    46         };

    47     }

    48 

    49     var last = Y.Lang.now();

    50 

    51     return function() {

    52         var now = Y.Lang.now();

    53         if (now - last > ms) {

    54             last = now;

    55             fn.apply(this, arguments);

    56         }

    57     };

    58 };

    59 

    60 

    61 }, '3.10.3', {"requires": ["yui-base"]});