545209 - Can't get OBJECT via ID if the html-object is an input of the type hidden.

Status: VERIFIED WORKSFORME

(Core :: DOM: Core & HTML, defect)

Description

[berstbest]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.0.8 (en-US) (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.0.8 (en-US) (.NET CLR 3.5.30729)

While testing with some HTML and JavaScript I found that in Firefox an input-field of the type hidden as defined like this:

<input type="hidden" id="h1" value="foo" />

can not be found with Javascript by a call like this:

alert(document.getElementById('h1')); //returns null

This only happens if on the html-site all inputs are of the type hidden!


Reproducible: Always

Steps to Reproduce:
1. Create a html-site with the following simple code (it may not be valid but it will suffice the bug-reproducing):

<input type="hidden" id="a1" value="a1" />
<input type="text" id="a2" value="a2" />
<script type=text/javascript>
alert(document.getElementById('a1'));
alert(document.getElementById('a2'));
</script>

This should get you 2 alert-Messages with each one saying: [object HTMLInputElement]

2. Now create a second HTML-file with the following code:

<input type="hidden" id="a1" value="a1" />
<input type="hidden" id="a2" value="a2" />
<script type=text/javascript>
alert(document.getElementById('a1'));
alert(document.getElementById('a2'));
</script>

As you can see we have only changed the type of the second input from text to hidden.
Now the result will be 2 alert-Messages with each one saying: null

Actual Results:  
The getElementById() function returns null which means that the Objects were not found, which should not have happend as they both exist.

Expected Results:  
As in the first example the script should have replied with [object HTMLInputElement] not with null.

Comment 1

[Tim (fmdeveloper)]

Can confirm on 3.6 Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 ID:20101203075014

However, this works on trunk - Mozilla/5.0 (Windows NT 5.1; rv:2.0b9pre) Gecko/20101222 Firefox/4.0b9pre ID:20101222030351

Comment 2

[Tim (fmdeveloper)]

Reporter -> Can you retest with Firefox 6 and report if the issue persists?

Comment 3

[berstbest]

Retestet the mentioned Bug and could not find any problems with
Mozilla/5.0 (X11; Linux i686; rv:6.0) Gecko/20100101 Firefox/6.0

I therefor closed this Bug.

Comment 4

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

Thanks. Happy to see it works for you!