Bug 242104 – white-space value change is ignored when the content is whitespace only.

• Status: RESOLVED
• Resolution: CONFIGURATION CHANGED
• Component: CSS

Some grammar in webkit and chrome have different display .
When use white-space:pre and the label not have content.
Chrome and webkit have different display.
Then I see the https://developer.mozilla.org/en-US/docs/Web/CSS/white-space,I think might be save the white space.

WebKitGTK version is 2.36.3

Created attachment 460537 [details]
the two file only change white-space :pre

[zalan]

Created attachment 460609 [details]
Test reduction

It looks like we ignore the white-space style change when the content is whitespace only.

[zalan]

(In reply to 2843035794 from comment #0)
> Some grammar in webkit and chrome have different display .
> When use white-space:pre and the label not have content.
> Chrome and webkit have different display.
> Then I see the
> https://developer.mozilla.org/en-US/docs/Web/CSS/white-space,I think might
> be save the white space.
You are right, white-space handling has a bug in WebKit. Thank you for filing it.

[zalan]

1. initially we don't create a renderer (RenderText) for the collapsed whitespace content
2. however when style changes to "yes, please preserve whitespace", we don't recover from it by constructing a RenderText object.

[zalan]

This looks like a RenderTreeUpdater::updateRenderTree() issue -> Antti.

[Radar WebKit Bug Importer]

<rdar://problem/96295935>

[Ahmad Saleem]

@Alan - it seems to work in Safari 18 Beta and STP200 while still broken in Safari 17.6.

I am marking this as 'RESOLVED CONFIGURATION CHANGED'.