jQuery: Wildcard class selector in removeClass

问题

This code snippet works to remove an existing class, before adding a new one, when I specify it directly (ie, 'ratingBlock', 'ratingBlock1', 'ratingBlock2', etc.). But when I use a wildcard selector in the removeClass ('[class^="ratingBlock"]'), it doesn't work. Am I doing something wrong? Thanks.

<style type="text/css">
.ratingBlock {background:gold !important;}
.ratingBlock1, .ratingBlock2, .ratingBlock3, .ratingBlock4, .ratingBlock5 {background:LightGreen;}
</style>

<div class="test block ratingBlock">
Broken
<div><a href="#" class="ratingLink ratingNo-1">1+</a></div>
<div><a href="#" class="ratingLink ratingNo-2">2+</a></div>
<div><a href="#" class="ratingLink ratingNo-3">3+</a></div>
</div>

<script type="text/javascript">
// <![CDATA[
jQuery(document).ready(function(){
    initRatingWorks();
});

function initRatingWorks() {
    jQuery("a.ratingLink").bind('click', function() {
      var star = jQuery(this);
      var ratingBlock = star.parents('div.test.block');
      var rating = star.attr('class').match(/\d+/);

      if (ratingBlock.attr('class').indexOf('ratingBlock') !== -1) {
          ratingBlock.removeClass('[class^="ratingBlock"]').addClass('ratingBlock' + rating);
      }
      else {
          ratingBlock.addClass('ratingBlock' + rating);
      }

      return false;
    });
}
// ]]>
</script>

回答1:

$.removeClass() doesn't take a selector as a parameter, only a class name (or class names).

See: Removing multiple classes (jQuery)

So you basiacally need to call:

$.removeClass('ratingBlock1 ratingBlock2 ratingBlock3 ratingBlock4 ratingBlock5');

回答2:

removeClass takes either a function or a class name. You are trying to provide a css selector. It looks like all you need is:

ratingBlock.removeClass('ratingBlock').addClass('ratingBlock' + rating)

Furthermore you could remove a wildcard like this:

ratingBlock.removeClass (function (index, css) {
    return (css.match (/ratingBlock/g) || []).join(' ');
});

Reference: JQuery removeClass wildcard

回答3:

If it makes it any easier, I wrote a plugin for another answer that will strip classes beginning (or ending) with a match, so

ratingBlock.stripClass('ratingBlock-').addClass('ratingBlock-' + rating);

will remove ratingBlock-1 and ratingBlock-2 but not ratingBlock (as long as you include the dash).

Code: https://gist.github.com/zaus/6734731

回答4:

I think your problem is the quotation marks: I don't think you need them, try omitting them.

'[class^=ratingBlock]'

EDIT:

.removeClass() accepts a class name, not a selector.

You can, however, specify multiple space separated class names, so could try this:

.removeClass('ratingBlock ratingBlock1 ratingBlock2');

http://api.jquery.com/removeClass/

来源：https://stackoverflow.com/questions/16039708/jquery-wildcard-class-selector-in-removeclass

标签

jquery

selector

wildcard

removeclass