$.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：

1 // Hold (or release) the ready event 2     holdReady: function( hold ) { 3         if ( hold ) { 4             jQuery.readyWait++; 5         } else { 6             jQuery.ready( true ); 7         } 8     }, 9 10     // Handle when the DOM is ready11     ready: function( wait ) {12 13         // Abort if there are pending holds or we're already ready14         if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {15             return;16         }17 18         // Remember that the DOM is ready19         jQuery.isReady = true;20 21         // If a normal DOM Ready event fired, decrement, and wait if need be22         if ( wait !== true && --jQuery.readyWait > 0 ) {23             return;24         }25 26         // If there are functions bound, to execute27         readyList.resolveWith( document, [ jQuery ] );28 29         // Trigger any bound ready events30         if ( jQuery.fn.trigger ) {31             jQuery( document ).trigger("ready").off("ready");32         }33     },