545636 - return a wrong value for css style at first call when change stylesheet file

Status: RESOLVED INVALID

(Core :: DOM: CSS Object Model, defect)

Description

[Xidorn Quan [:xidorn] UTC+10]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; zh-CN; rv:1.9.1.7) Gecko/20100106 Ubuntu/9.10 (karmic) Firefox/3.5.7
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; zh-CN; rv:1.9.1.7) Gecko/20100106 Ubuntu/9.10 (karmic) Firefox/3.5.7

When I click the white block for the first time, with the stylesheet to be changed, the text on the right should show the background color (black) and text color (white) of the block modified, but it shows "transparent" and "rgb(0, 0, 0)" instead.

Reproducible: Always

Steps to Reproduce:
1.Open the HTML file
2.Click the white block
3.It happens!
Actual Results:  
background: transparent
color: rgb(0, 0, 0)

Expected Results:  
background: rgb(0, 0, 0)
color: rgb(255, 255, 255)

Comment 1

[Xidorn Quan [:xidorn] UTC+10]

Attachment: Comparision of the value in different browser

Comment 2

[John P Baker]

Attachment: modified reporter's testcase

Comment 3

[tomchen]

Attachment: modified case 2

Comment 4

[Boris Zbarsky [:bzbarsky]]

The testcase starts an asynchronous load of a new stylesheet, then immediately (synchronously) checks the computed style.  Since the new sheet hasn't loaded yet at that point, you don't get the new sheet's styles applied.

Comment 5

[Boris Zbarsky [:bzbarsky]]

Oh, and Opera and Safari have the same behavior.

Comment 6

[Xidorn Quan [:xidorn] UTC+10]

(In reply to comment #5)
> Oh, and Opera and Safari have the same behavior.

But when I test it locally, only Firefox behaves like that, and other browsers including IE6 give the correct value.

Comment 7

[Xidorn Quan [:xidorn] UTC+10]

(In reply to comment #5)
> Oh, and Opera and Safari have the same behavior.

And when testing the modified testcase submitted by John P Baker, Firefox is the only browser returns a wrong value as well.

Comment 8

[Boris Zbarsky [:bzbarsky]]

Local behavior will depend on browser; some might decide to make the load synchronous.  Firefox always does loads asynchronously, so that you don't get inconsistent behavior between local and non-local.