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Document the deprecation policy of HTML tags. #1732

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merged 6 commits into from Mar 3, 2024
Merged

Document the deprecation policy of HTML tags. #1732

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493200b
Deprecate `strike` HTML tag
zecakeh Feb 26, 2024
4597fcd
Add changelog
zecakeh Feb 26, 2024
05d0816
Merge branch 'main' into msc4077
zecakeh Feb 27, 2024
34579a6
Remove strike deprecation and add added-in annotation
zecakeh Feb 27, 2024
4982abb
Add link to HTML standard
zecakeh Feb 28, 2024
5befbfc
Update changelogs/client_server/newsfragments/1732.clarification
turt2live Mar 3, 2024
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1 change: 1 addition & 0 deletions changelogs/client_server/newsfragments/1732.clarification
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@@ -0,0 +1 @@
Document the deprecation policy of HTML tags.
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7 changes: 7 additions & 0 deletions content/client-server-api/modules/instant_messaging.md
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Expand Up @@ -48,6 +48,13 @@ tags to permit, denying the use and rendering of anything else, is:
`s`, `code`, `hr`, `br`, `div`, `table`, `thead`, `tbody`, `tr`,
`th`, `td`, `caption`, `pre`, `span`, `img`, `details`, `summary`.

{{% boxes/note %}}
{{% added-in v="1.10" %}}
HTML features MAY be deprecated and replaced by their modern equivalent without
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requiring a [Spec Change Proposal](/proposals) when they are deprecated in the
[WHATWG HTML Living Standard](https://html.spec.whatwg.org/multipage/).
{{% /boxes/note %}}

Not all attributes on those tags should be permitted as they may be
avenues for other disruption attempts, such as adding `onclick` handlers
or excessively large text. Clients should only permit the attributes
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