feat(clock): add live Digital Clock tool - #377
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A real-time digital clock that ticks via requestAnimationFrame, showing HH:MM:SS plus animated milliseconds and microseconds, in any IANA time zone (defaults to the user's, with a one-tap 'My zone'). 12/24-hour toggle, localized date + UTC offset, and copyable Unix epoch (ms) / ISO string. Also mirrors HH:MM:SS in the tab title. Pure, unit-tested clock.lib (readout, offset canonicalisation, zone list); thin island. Microsecond precision is honestly labelled as browser-clamped best-effort. EN + ID SEO added; happy-path E2E included.
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| Status | Name | Latest Commit | Updated (UTC) |
|---|---|---|---|
| ✅ Deployment successful! View logs |
goodwebtools | b67c2f2 | Sep 09 2026, 05:19 AM |
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What
A new Digital Clock tool (
/tools/clock, Calculators) — the current time ticking live in real time via requestAnimationFrame:HH:MM:SSwith animated milliseconds and microsecondsHH:MM:SSin the browser tab titleHonesty note
True microsecond wall-clock time isn't available in browsers —
Date.now()is ms-resolution andperformance.now()is clamped as a Spectre mitigation. The µs field is a best-effort read of the high-resolution timer, and the UI + FAQ say so plainly.Tests
clock.lib(8 cases: readout, offset canonicalisation, zone list).e2e/tools/clock.spec.ts(live tick → tab title, timezone switch, 12h AM/PM) + render smoke./tools/clock/and/id/tools/clock/build.Unit (2215) + lint (0 errors) + build green.