I can't for the life of me work this one out. I have js running and 'container state..' is a console log from the running js on the page. It's displaying a selector, but if i want to do anything within the console it just returns null. I'm assuming somehow i'm over writing jQuery function somewhere, as if i called jQuery
>>> $
function()
This is how i am calling a selector
Container state 3 jQuery(div.module-carousel)
>>> $('body')
null
jQuery uses 2 namespaces, jQuery
and $
. Another library could have used the $
. Try using jQuery
instead of $
(assuming that it isn't overridden as well):
jQuery('body');
or wrap jQuery in an immediate function and use $
in it so you don't need to replace $
in the existing code:
(function($){
//"$" in here is jQuery
//code that uses $ as jQuery will work in here
}(jQuery)); //pass in jQuery and execute
你可以在控制台上编写任何命令之前使用它。
$ = jQuery.noConflict();
If your $
is overloaded (but not jQuery
), and you want to work in your console, just do the following:
$ = jQuery;
As simple as that.
For a more complete solution (real development, not just console), use @Joseph the Dreamer 's solution.
Both Firefox and Chrome define $
as a shorthand for document.getElementById
in the console. This shorthand will automatically be overridden when the page defines $
.
So, load jQuery ( through a bookmarklet for example) and you can use jQuery selectors.
If you don't need jQuery-specific selectors, you can also use $$
, which is a shorthand for document.querySelectorAll
, which supports CSS(3) selectors.
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