Bug 238339

Summary: [CSS Container Queries] Different size rendered than Chrome
Product: WebKit Reporter: jec <jec>
Component: CSSAssignee: Nobody <webkit-unassigned>
Status: RESOLVED CONFIGURATION CHANGED    
Severity: Normal CC: koivisto, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari Technology Preview   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Chrome none

Description jec 2022-03-24 11:28:00 PDT 
Created attachment 455658 [details]
Chrome

TP 142

Open https://jec.fyi/demo/css-container-queries in Chrome and Safari, and compare.

A few issues:

1. The initial view is different. Expected Chrome view.
2. Try to resize the container (white box) horizontally by dragging the triangle in the container's right bottom corner. Not able to resize it in Safari.

Chrome: https://imgur.com/qTe0po6
Safari: https://imgur.com/dl7ooAP
Comment 1 Radar WebKit Bug Importer 2022-03-24 16:06:43 PDT 
<rdar://problem/90799512>
Comment 2 Antti Koivisto 2022-03-29 04:51:14 PDT 
The test page uses obsolete syntax. The current spec interpretion of

@container size (max-width: 399px) {

is "match nearest width container that has name "size" and width <= 399px. There is no container with that name so nothing is matched.


Note that the current STP doesn't yet implement this fully though the trunk should.