[css-text-decor] Underline position for when decorating box is higher than regular position
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Description
Test:
https://jsbin.com/tewugik/edit?html,output
Gecko positions the underline at the decorating box, while Edge seems to take the lower of the decorating box and the default position of the node.
This difference, along with Blink/WebKit not supporting decorating box yet (crbug.com/1008951), is causing web compat issue for Mozilla.
https://bugzilla.mozilla.org/show_bug.cgi?id=1387206
The actual site: https://www.bbc.com/sport/formula1
Can we take Edge's behavior? When actual regressions are known at multiple sites, it'd be difficult for us to match the spec.
/cc @jfkthame
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked jsbin test and compare the underline behavior described for Gecko and Edge. Review the linked Chromium and Mozilla compatibility reports; the issue is done when the CSS Working Group resolves which behavior the specification should require and records that decision.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- css
- Domain
- frontend, web-dev
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100