<ins>
Content added to the document after publication, kept visible as a tracked change.
Baseline: Widely available · Edits
When to use it
For corrections and additions to published content, stamped with datetime and a cite URL pointing at what prompted the change.
When not to
Not for underlining (CSS) and not for content that was simply always there.
Key attributes
datetime- when the edit was made
cite- URL explaining the change
Example
The deadline is
July 1
July 15.
<p>The deadline is
<del datetime='2026-07-01'>July 1</del>
<ins datetime='2026-07-01'>July 15</ins>.</p>