jQuery在选定选项卡上添加类

Question

I am a beginner with jQuery and I am trying to modify a script. The script demo is here . Right now, they add a line above the selected tab, which I don't want. What I want to do is just add a class to the anchor like a

<a class="tab active" href="#">Tab Name</a>

that way I can just use CSS to change the background color or something for the active buttons.

The code below is what they currently have for when you click on a tab.

the_tabs.click(function(e){
    /* "this" points to the clicked tab hyperlink: */
    var element = $(this);

    /* If it is currently active, return false and exit: */
    if(element.hasClass('.active')) return false;

    $(this).addClass('active')

Answer 1

the_tabs.click(function(e){
    var element = $(this);
    if( element.hasClass('active') ) {
        return false;
    }
    else {   
        the_tabs.removeClass('active'); 
        element.addClass('active');
    }
}  

Answer 2

You just need:

 $(this).addClass('nameOfYourClass')

to add a class to the clicked object

Answer 3

instead of

if(element.find('.active').length) return false;

use

if(element.hasClass('.active')) return false;

or you have to use .filter instead of .find , find is trying to find a child node that has the class .active but .filter filters out the collection to find the matching css-selecotr

Answer 4

Try this:

the_tabs.click(function(e){
    /* "this" points to the clicked tab hyperlink: */
    var element = $(this);

    /* If it is currently active, return false and exit: */
    if(element.hasClass('active')) return false;

    /* Detecting the color of the tab (it was added to the class attribute in the loop above): */
    var bg = element.attr('class').replace('tab ','');

    $('ul.tabContainer .active').removeClass('active');
    element.addClass('active');

    /* Checking whether the AJAX fetched page has been cached: */

    if(!element.data('cache'))
    {   
        /* If no cache is present, show the gif preloader and run an AJAX request: */
        $('#contentHolder').html('<img src="img/ajax_preloader.gif" width="64" height="64" class="preloader" />');

        $.get(element.data('page'),function(msg){
            $('#contentHolder').html(msg);

            /* After page was received, add it to the cache for the current hyperlink: */
            element.data('cache',msg);
        });
    }
    else $('#contentHolder').html(element.data('cache'));

    e.preventDefault();
})

Also check my blog (website) for some nice jQuery guides. :)