jQuery not working with WordPress

Question

I think there is a conflict with the way WordPress uses jQuery:

Tried:

(function($) {
    $(document).ready(function(){
        alert('hello');
    });
}(jQuery));

Tried also:

$(document).ready(function(){
    alert('hello');
});

And Firebug dumps:

jQuery is not defined
[Detener en este error] }(jQuery));

And also tried:

jQuery.noConflict();
jQuery(document).ready(function($) {
   alert("hello");
});

and Firebug:

jQuery is not defined
[Detener en este error] jQuery.noConflict();

And jQuery is imported

Any idea what am i missing?

Do you have jQuery included before your script? Also, a link to your site could help people answer your question. — vzwick
– vzwick, Commented Oct 3, 2011 at 15:43
You sure it's imported? You tried to view source and it's there, and the URL is correct? And $ and jQuery aren't defined in the firebug console? — mpen
– mpen, Commented Oct 3, 2011 at 15:43

Lekensteyn · Accepted Answer · 2011-10-03 16:12:21Z

3

It looks like jQuery is not available (neither the $ variable nor jQuery were defined). In your particular case, it's because the library is not loaded at all. Put the next code in your <head> section before your the scripts requiring jQuery:

<script src="//code.jquery.com/jquery-1.6.4.min.js"></script>

answered Oct 3, 2011 at 16:12

Lekensteyn

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2 Comments

Toni Michel Caubet Over a year ago

so how is it posible that the search input with is animated onClick??

Lekensteyn Over a year ago

@ToniMichelCaubet The animation ("slide") in done with CSS. The removal of the text "Search" is done with HTML5.

Bosworth99 · Accepted Answer · 2011-10-03 16:21:56Z

How are you including jquery? Whatever the case may be, its not happening (check out the head / check out the page DOM via firebug - no $ or jQuery references).

The correct way to link the hosted version of jquery (and in this case, a dependent plugin) in wordpress looks like this:

in functions.php (or a plugin... or whatever)

// register scripts 
if (! function_exists(thickbox_register){
function thickbox_register() {
    wp_deregister_script( 'jquery' );
    wp_register_script( 'jquery','http://ajax.googleapis.com/ajax/libs/jquery/1.6/jquery.min.js');
    wp_register_script( 'thickbox', 'path to thickbox'.thickbox.js, 'jquery');
    }  
}   
add_action('init', 'thickbox_register');

//print the now registered scripts 
if (! function_exists(thickbox_enqueue){
function thickbox_enqueue() {
    wp_enqueue_script( 'jquery' );
    wp_enqueue_script( 'thickbox' );
    }  
}
add_action('wp_print_scripts', 'thickbox_enqueue');

// do the same for css 
if (! function_exists(thickbox_style_enqueue){
function thickbox_style_enqueue() {
    wp_register_style( 'thickbox', 'path to css'.thickbox.css );
    wp_enqueue_style( 'thickbox' );
    }  
}
add_action('wp_print_styles', 'thickbox_style_enqueue');

To ensure wordpress delivers the correct scripts at the correct time, you must add actions to the init and register script wordpress methods.

Hope that helps

krembo99 · Accepted Answer · 2011-10-04 02:57:50Z

2

even if your document works now, for better practive :

change all your $ sign with "Jquery" . (conflicting with wordpress core)
you are not declaring class or id .

for example in your code :

  $('header').hide();

should be

jQuery('#branding').hide();

and

$('body').css('position','relative');

should be

jQuery('.home').css('position','relative');

your code is semantic , where header is not a tag, but a tag , meaning header is not a class or id (rather #branding is an id ) and body as well (rather .home or .blog) better practice would be to declare the class .

answered Oct 4, 2011 at 2:57

krembo99

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Comments

Bala · Accepted Answer · 2011-10-03 16:16:40Z

0

Checked the URL you have posted and there seems to be no reference to jQuery.

Include the below code inside head

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"> </script>

answered Oct 3, 2011 at 16:16

Bala

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Comments

enloz · Accepted Answer · 2011-10-03 16:21:48Z

0

Try putting this code in <head>

<script type="text/javascript" src="http://code.jquery.com/jquery-1.6.4.min.js"></script>

answered Oct 3, 2011 at 16:21

enloz

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