SOURCE CODE: Uize.Widget.Page.xDeferredLinks (view docs)

/*______________
|       ______  |   U I Z E    J A V A S C R I P T    F R A M E W O R K
|     /      /  |   ---------------------------------------------------
|    /    O /   |    MODULE : Uize.Widget.Page.xDeferredLinks Class Extension
|   /    / /    |
|  /    / /  /| |    ONLINE : http://www.uize.com
| /____/ /__/_| | COPYRIGHT : (c)2010-2016 UIZE
|          /___ |   LICENSE : Available under MIT License or GNU General Public License
|_______________|             http://www.uize.com/license.html
*/

/* Module Meta Data
  type: Extension
  importance: 4
  codeCompleteness: 100
  docCompleteness: 0
*/

/*?
  Introduction
    The =Uize.Widget.Page.xDeferredLinks= module extends the =Uize.Widget.Page= base class by adding functionality for defer wiring links on the page.

    *DEVELOPERS:* `Ben Ilegbodu`, original code contributed by `Zazzle Inc.`

    Instead of relying on search engines or scrapers to adhere to rel="nofollow", you can include link tags in the page with dummy =href= attributes (such as ="javascript://"=), and set the =href= in the JavaScript.
*/

Uize.module ({
  name:'Uize.Widget.Page.xDeferredLinks',
  required:'Uize.Dom.Basics',
  builder:function (_class) {
    'use strict';

    _class.declare ({
      instanceMethods:{
        wireDeferredLinks:function () {
          var
            m = this,
            _links = m.deferredLinks,
            _numLinks = _links.length,
            _linkNo = 0
          ;

          (function _wireLinks() {
            function _wireLink(_link) {
              var
                _linkNode = Uize.Dom.Basics.getById(_link[0]),
                _linkInfo = _link[1]
              ;

              if (typeof _linkInfo == 'string')
                m.setNodeProperties(_linkNode, {href:_linkInfo});
              else
                m.wireNode(
                  _linkNode,
                  'click',
                  function () {
                    m.launchPopup(
                      Uize.copyInto(
                        {
                          url:_linkInfo.href,
                          name:_linkInfo.target
                        },
                        _linkInfo.popupParams
                      )
                    )
                  }
                );
            }

            for (var _endNo = Math.min(_numLinks, _linkNo + m.linkBatchSize); _linkNo < _endNo; _linkNo++)
              _wireLink(_links[_linkNo])
            ;

            if (_linkNo < _numLinks)
              setTimeout(_wireLinks, 0)
            ;
          }) ();
        }
      },

      stateProperties:{
        deferredLinks:{
          name:'deferredLinks',
          value:[]
        },
        linkBatchSize:{
          name:'linkBatchSize',
          value:25
        }
      }
    });
  }
});