Read the question, write HTML on the right, then Preview or Check.
QuestionHint and solution stay closed until you open them
Mark 2026-08-21 with <time datetime="2026-08-21">.
Examples
Expected
time
Hint
- datetime is machine-readable.
Show correct code
Peek only after you have tried. You can still Check your own version.
<time datetime="2026-08-21">2026-08-21</time>
index.htmlLive preview · Check reads the DOM
ResultIdle
Run to see output. Check grades the tests.