jquery ready 延迟

$.holdReady(true);//延迟

$.holdReady(false);//解延迟

用于下载文件的时候，异步操作

$.holdReady(true);

$.getScript("a.js",function(){

$.holdReady(false);

})

$.holdReady(true);

$.getScript("b.js",function(){

$.holdReady(false);

})

......

内部酷似锁的机制 锁了2次，都加载了之后解锁2次，才继续往下...

源码：

 // Hold (or release) the ready event
     holdReady: function( hold ) {
         if ( hold ) {
             jQuery.readyWait++;
         } else {
             jQuery.ready( true );
         }
     },

     // Handle when the DOM is ready
     ready: function( wait ) {

         // Abort if there are pending holds or we're already ready
         if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
             return;
         }

         // Remember that the DOM is ready
         jQuery.isReady = true;

         // If a normal DOM Ready event fired, decrement, and wait if need be
         if ( wait !== true && --jQuery.readyWait > 0 ) {
             return;
         }

         // If there are functions bound, to execute
         readyList.resolveWith( document, [ jQuery ] );

         // Trigger any bound ready events
         if ( jQuery.fn.trigger ) {
             jQuery( document ).trigger("ready").off("ready");
         }
     },