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Kévin Commaille 2026-01-26 10:29:19 +00:00 committed by GitHub
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Clients supporting the `ol` HTML element must also support the `start` attribute, as per [MSC4313](https://github.com/matrix-org/matrix-spec-proposals/pull/4313).

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@ -84,6 +84,10 @@ Additionally, web clients should ensure that *all* `a` tags get a
`rel="noopener"` to prevent the target page from referencing the `rel="noopener"` to prevent the target page from referencing the
client's tab/window. client's tab/window.
{{% added-in v="1.18" %}} Clients that support the `ol` tag MUST also support
the `start` attribute in order to prevent loss of meaning of a message due to
the numbering of list items.
Tags must not be nested more than 100 levels deep. Clients should only Tags must not be nested more than 100 levels deep. Clients should only
support the subset of tags they can render, falling back to other support the subset of tags they can render, falling back to other
representations of the tags where possible. For example, a client may representations of the tags where possible. For example, a client may