JavaScript Coding for a Countdown From 10 to 0. JavaScript is a well-known and widely used scripting language used mostly to write applications for Web pages.

There might be 300 JavaScript countdown timers out there, but this one just happened to catch our eye for its convenience and adaptability. Thanks to j3st for the tip!

Executing JavaScript code will definitely involve the processor cache and a high-resolution timer is accessible via browser performance API.