437379 - maxlength is not respected when text input value is changed dynamically through javascript

Status: RESOLVED WONTFIX

(Core :: Layout: Form Controls, defect)

Description

[Jouni Airaksinen]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1a1pre) Gecko/2008060403 Minefield/3.1a1pre

Maxlength is not respected when value of the text input changes dynamically with javascript. Firefox 2 behaves as expected and the value is truncated.

<input type="text" maxlength="5" id="test" />
<script language="JavaScript">
document.getElementById('test').value = "longer than it should be";
</script>

Reproducible: Always

Steps to Reproduce:
1.
2.
3.

Comment 1

[Jouni Airaksinen]

Attachment: maxlength test

Comment 2

[Ria Klaassen (not reading all bugmail)]

Duplicate of Bug 350786 ?

Comment 3

[Phil Ringnalda (:philor)]

No, not a dupe. It's asking (without providing any reason other than Fx2-compat) that bug 345267 be reverted. Assuming the comments there are correct, and the current behavior is the same as every other browser except Fx2, it's a wontfix.

Comment 4

[Boris Zbarsky [:bzbarsky]]

Indeed.

Comment 5

[Jouni Airaksinen]

It's just strange behaviour for javascript to not respect html when the DOM is modified. Are there any official specifications on how this should actually work - rather than saying "other browsers do it like that"? If this mentality is used, then we'd have to duplicate all IE quirks as it's how the other half of the world is doing it.

Comment 6

[Boris Zbarsky [:bzbarsky]]

> Are there any official specifications on how this should actually
> work - rather than saying "other browsers do it like that"?

Not yet.  HTML5 is specifying this behavior (and Firefox 3 is following the draft HTML5 spec).

> then we'd have to duplicate all IE quirks

We basically do duplicate all the IE quirks that don't violate existing specifications and are needed to make significant numbers of existing web sites work...  So do all the other browsers.