How to Build Pomodoro Timer in React | React Tutorial

Опубликовано: 20 Февраль 2026
на канале: Aleks Popovic

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Tutorial on how to build an infinite Pomodoro timer in React. Pomodoro is a time management technique in which you work for a set amount of time (e.g. 25 minutes), then you take a small break (e.g. 5 minutes) and then you repeat this cycle. In classic Pomodoro you would work for 4 cycles total and then take a longer break, but in this simplified version we are going to build a time tracker that repeats infinitely.

See the full project in action on SandBox: https://codesandbox.io/s/pomodoro-361jf

Find code from this video in my Github repo: https://github.com/alekspopovic/pomodoro

Find text version of this tutorial on my website: https://aleksandarpopovic.com/Infinit...

Music in the video is from StreamBeats collection by Harris Heller.

Blog: https://aleksandarpopovic.com/blog/
Github: https://github.com/alekspopovic/
Twitter: / alekswritescode
Instagram: / aleks.popovic

Chapters:
0:00 Intro
0:24 Setting up JSX
01:37 Setting up CSS
03:11 Setting up useState
04:50 Prepending single digit values with a zero
06:17 Timer
08:58 Switching to a break
10:17 Testing it out
10:51 Additional features and ideas
11:18 Outro