Object has no method 'live' - jQuery

问题:

<script>
$(document).ready(function(){
    $('.delete').live('click', function(e){
        alert('delete');
        e.preventDefault();
    });
});
</script>
<a href='#' id='_1' class='delete'>Delete</a>

Gives me an error:

Uncaught TypeError: Object [object Object] has no method 'live'

I just don't see the problem?

回答1:

.live() is a deprecated function (from 1.7+) and removed completely from jQuery 1.9+.

You can instead use .on() or .bind() methods:

http://api.jquery.com/on/
http://api.jquery.com/bind/

回答2:

1. If the call to .live() is inside your own code, just change it to .on() using the rules shown at http://api.jquery.com/live.

2. If the code is in a third-party jQuery plugin, use the jQuery Migrate plugin to restore .live() until the author updates their plugin: https://github.com/jquery/jquery-migrate#readme.

3. In production sites, do not use URLs that reference the "latest" version of jQuery such as http://code.jquery.com/jquery-latest.js or http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js since they will automatically update when a new version of jQuery is released and your site will suddenly break if it is not compatible.

回答3:

If you are using jQuery 1.7+ use on(...) instead of live(...).
Check this: http://api.jquery.com/on/

回答4:

There is one scenario when neither .on(), nor .bind() won't work: when the element does not exist when the event handler is being added. And this was what live() did.

回答5:

See on http://api.jquery.com/live/

old

$("a.offsite").live("click", function(){ alert("Goodbye!"); });                // jQuery 1.3+
$(document).delegate("a.offsite", "click", function(){ alert("Goodbye!"); });  // jQuery 1.4.3+

new

$(document).on("click", "a.offsite", function(){ alert("Goodbye!"); });        // jQuery 1.7+

回答6:

use .on

<script>
$(document).ready(function(){
    $('.delete').on('click', function(e){
        alert('delete');
        e.preventDefault();
    });
});
</script>

回答7:

There is a jQuery migrate plugin (use that) ....... it will resolve the issue

ASP.NET MVC ajax-unobtrusive + jQuery 1.9 http://bugs.jquery.com/ticket/13220