Stopwatch

Start, stop, lap — accurate timing that doesn't drift.

A stopwatch with lap times that stays accurate by measuring elapsed time instead of counting ticks — the mistake most first attempts make. A tidy lesson in doing time right.

What's inside

• Start / stop / reset and lap splits
• Accurate timing from Date deltas, not tick counting
• Clean mm:ss.cs formatting
• Lap list rendered from an array
• Light & dark mode, no dependencies

Quickstart

$ curl -LO https://devai.io/downloads/stopwatch.zip$ unzip stopwatch.zip && cd stopwatch$ open index.html   # or just double-click the file

Browse the code

The full source, exactly as the zip ships it.