JQuery change String.prototype.split in IE < 9 (add trim)

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In IE 6, 7, 8: (' a ').split(/\s+/).length == 1 but should be 3.

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Not only for spaces: 'xAx'.split(/x/).length == 1 but should be 3.

[Rick Waldron]

jQuery does not modify native objects.

[anonymous]

Replying to rwaldron:

jQuery does not modify native objects.

Yes, jQuery should not modify the native objects, and in its code, it does not, but in fact changes occur, it is easily and consistently reproduced (just try it). I don't know how it happens, but it is a serious bug that prevents work. Of course, part of the blame lies with IE.

[Rick Waldron]

Your subject...

JQUERY CHANGE STRING.PROTOTYPE.SPLIT

implies that jQuery has changed something.

[Rick Waldron]

I'm still not sure where the jQuery bug is...? I just tested this: ​http://jsfiddle.net/rwaldron/4k9aw/show/light/ in IE98 and the result for jQuery.trim() was as expected.

[anonymous]

Replying to rwaldron:

I'm still not sure where the jQuery bug is...? I just tested this: ​http://jsfiddle.net/rwaldron/4k9aw/show/light/ in IE98 and the result for jQuery.trim() was as expected.

Try this in IE8, in any site with jQuery (in IE9 all correct):

'xAx'.split(/x/).length

You should now have 3, but it turns 1, as if somewhere inside the trim is applied for 'xAx' before split. Maybe the reason is that in the IE < 9 function trim not native.

[Rick Waldron]

So, where is the bug in jQuery? String.prototype.split is not jQuery's domain...

I recommend using Underscore: ​http://documentcloud.github.com/underscore/ for compatible utility methods.

[anonymous]

Replying to rwaldron:

So, where is the bug in jQuery? String.prototype.split is not jQuery's domain...

I recommend using Underscore: ​http://documentcloud.github.com/underscore/ for compatible utility methods.

You're right, and I was wrong: it seems to be a bug of IE and it does not depend on jQuery. Sorry for your trouble.