Should custom validity error message treat \r as newline?

Open sefeng211 opened this issue 1 year ago • 1 comments

What is the issue with the HTML Standard?

A test snippet can be found at https://jsfiddle.net/naw7qxzf/

Currently Safari treats \r as newline, but Chrome doesn't. Looks like the spec only asks UAs to display this message, so this is left as an undefined behaviour.

May 09 '24 14:05 sefeng211

I think it should match the title attribute. Per https://software.hixie.ch/utilities/js/live-dom-viewer/?.%3Cscript%3E%0Adocument.body.title%20%3D%20%22Line%5CrLine2%5CnLine3%22%0A%3C%2Fscript%3E it seems that all browsers support \r as newline there.

However, https://html.spec.whatwg.org/#the-title-attribute does not say that. I guess we should fix that?

Further testing shows \r\n is a single newline as well, which is somewhat expected.

May 13 '24 09:05 annevk

That makes sense. alert uses https://infra.spec.whatwg.org/#normalize-newlines, maybe we should reuse it?

May 13 '24 17:05 sefeng211

Sounds good to me. Want to PR?

May 14 '24 07:05 annevk