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");
        }
    },