Is livequery deprecated

问题:

I'm looking at old code. I'm seeing that for elements that get added with ajax, there's lots of livequery code. Is livequery not needed anymore with the newer versions of jquery? Does anyone know after which version exactly it's not needed?

$("#somediv").livequery(function(){
    $(this).click(function(){

    });
});

回答1:

livequery is an entirely different concept from .live().

The .live() method uses event delegation to handle events that occur anywhere on the page.

livequery will invoke handlers when DOM changes occur (via jQuery methods).

For the example below, when an element with class="some_class" is added to the DOM (or the class is added to an element), the first handler will run. When removed, the second.

$('.some_class').livequery( function() {

       // apply a plugin to the element
    $(this).somePlugin();

}, function() {

    // clean up after the element was removed

});

There should be little actual need for livequery, but in that rare case where you need to respond to DOM changes, and have no control over the jQuery that is causing those changes, it can be useful.

回答2:

You have to use on() and attach the event to a parent or body. Ex :

$('#obj').livequery('click', function() { ... });
$('#obj').livequery(function() { ... });

become

$('body').on('click', '#obj', function() { ... });
$('body').on('DOMNodeInserted','#obj', function() { ... });

note that DOMNodeInserted is IE9+