Stopwatch

A minimalist stopwatch with start, stop, and reset, accurate to the hundredth of a second.

Screenshot of Stopwatch

About this project

A stopwatch built with plain JavaScript and a clean monospace display.

Key features:

  • Start, stop, and reset controls
  • Hours, minutes, seconds, and hundredths shown with zero padding
  • Time measured from the system clock rather than by counting ticks, so it stays accurate and keeps the elapsed time when paused
  • Protection against starting it twice