Leading/trailing space not treated consistently in className

[rmurphey]

[this probably needs a better description]

I've set up a demo page that shows this bug in detail at:

​http://www.rebeccamurphey.com/stuff/classbug/

I am populating a page with HTML contained in a JSON object sent by the server. Once the page is populated, I attempt to run the following jQuery:

$('li.toggle').size()

There are 54 li's that should match; Firefox 3 finds them, but other major browsers do not. I suspect the issue occurs when a class attribute contains some escape characters in the JSON, e.g.:

<li class=\"toggle\r\n\t\t\t\t\t\t\t\t\t\t\">

The following will result in alerts as appropriate, at least in Safari:

$('li).each(function() {

if (this.className.match('toggle')) { alert('match'); }

});

But this will not:

$('li').each(function() {

if (this.className == 'toggle') { alert('match'); }

});

[flesler]

That's odd, IE's regex engine does match \r, \n and \t when using /\s/.

Can you provide a test case ? an html file that reproduces the problem. Try not to use ajax, add the json within a js file and include it.

[rmurphey]

I've updated the test case at

​http://www.rebeccamurphey.com/stuff/classbug/

it wasn't using AJAX before, it was just populating the div with the json when the a#load was clicked.

[rmurphey]

Per the test case page I posted, this is a problem in:

• Safari 3.2
• IE6
• IE7

[dmethvin]

With a newline in the string, you are creating HTML like: {{{<li class=\"toggle

">}}}

}}}

​http://www.w3.org/TR/html401/types.html#type-cdata

"User agents may ignore leading and trailing white space in CDATA attribute values (e.g., " myval " may be interpreted as "myval"). Authors should not declare attribute values with leading or trailing white space."

I've attached a test case that shows that even with bare HTML/DOM, Firefox trims the trailing newlines/spaces but IE does not. Both are valid. The test correctly shows that 2 elements are selected in both IE and Firefox.

Whatever the problem is here, it seems that it's very dubious to depend on the behavior of trailing whitespace in a class name.

[dmethvin]

Works for FF and IE8.

[batiste]

A test that try to reproduce the bug 3680

[batiste]

I try to reproduce this bug but without success. Seems fixed to me.

[john]

This has since been fixed in jQuery 1.4.