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Browser Pomodoro Timer

A single-page vanilla JavaScript Pomodoro timer with work/break cycles, an audible alarm, and session history saved to localStorage. Learners practice DOM manipulation, setInterval-based timers, and browser storage APIs.

Estimate
~6h
Steps
5
Completed by
0
Proposed by
codeseed.app

Vanilla JS · localStorage · Web Audio API

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Project roadmap

  1. 01

    Build the timer UI

    ~1h

    Create the HTML/CSS layout with start, pause, and reset controls.

  2. 02

    Implement the countdown

    ~1.5h

    Use setInterval to count down and update the displayed time each tick.

  3. 03

    Add work/break cycles

    ~1h

    Automatically switch between work and break intervals when the timer reaches zero.

  4. 04

    Add an audio alert

    ~1h

    Play a sound using the Web Audio API when an interval completes.

  5. 05

    Persist session history

    ~1.5h

    Save completed session counts to localStorage and display a daily summary.

Resources

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~6h · 5 steps

Tech stack

Vanilla JSlocalStorageWeb Audio API