Learn React JS: Build Stopwatch Project

Name: Learn React JS: Build Stopwatch Project
Rating: 4.3 (63 reviews)

From Zero to Stopwatch Hero: React JS Fundamentals in Action

Created byAndrew Tyranowski

Last updated 9/2025

English

English [Auto],

What you'll learn

Build a fully functional stopwatch app using React from scratch
Use React hooks like useState and useRef to manage app behavior
Create and style interactive UI components with JSX and CSS
Understand how to structure and organize a React project efficiently

Course content

5 sections • 12 lectures • 36m total length

Introduction1:30
Build a practical stopwatch app using ReactJS with Vite, learn to build and organize components, apply data binding and dynamic interactions, and style with responsive UI techniques.

Installing Node.js1:13
Install Node.js to run React.js on your machine; download version 22 LTS as the latest long-term support, complete the Windows installation steps, then use npm to install a VM.
Installing Vite1:34
Open your terminal, install vite with npm, optionally install globally with npm install -g, then create a new React vanilla JavaScript project with npm create with latest and explore.
Visual Studio Code configuration1:18
Configure VS Code for React stopwatch by enabling auto close, autocomplete, and rename tag, and set prettier as formatter with format on save and auto save on focus change.

Creating project1:31
Create a new react project by running npm create with latest, naming it stopwatch react template react, then install dependencies and open Visual Studio Code to configure the project.
Project Setup2:38
Run npm run dev to test installation, open the link in a browser, and strip the template by deleting default files and renaming the title to stop watch React.
Global Styling and importing fonts2:19
Import Orbitron font from fonts.google.com into index.css, apply global styles, reset margins and box-sizing, set body background to #111, and center the stopwatch container with a flex layout at 100vh.
Creating Stopwatch and importing fonts4:03
Create a stopwatch component by adding stopwatch CSS and stopwatch.jsx, import the CSS into the app, export the stopwatch component, and verify by refreshing the page to render the header.
Styling Stopwatch Component10:03
Learn to style a stopwatch component in React by applying className-based structure, designing the time display and three buttons, and using gradients, shadows, rounded corners, and hover effects.
Finishing Application9:20
Finish building a React stopwatch by wiring useState and useRef, managing an interval to increment time, and implementing start, stop, and reset with precise minutes, seconds, and hundredths display.

Requirements

Basic understanding of HTML, CSS, and JavaScript is recommended.

Description

Welcome to Learn React: Build Stopwatch Project—a hands-on, beginner-friendly course designed to help you master the fundamentals of React by building a sleek, functional stopwatch from scratch. Whether you're just starting your journey into web development or looking to solidify your React skills with a practical project, this course offers the perfect blend of theory and application.

Throughout the course, you'll dive into essential React concepts such as components, props, state management, and hooks—focusing specifically on and . These tools will empower you to manage dynamic data, control DOM elements, and create responsive user interfaces. You’ll learn how to structure your app logically, handle user interactions like button clicks, and display real-time updates with precision and style.

By the end of the course, you’ll have built a fully functional stopwatch with start, stop, and reset capabilities, wrapped in a modern, glowing interface that proudly features the React logo. The project is designed to be visually engaging and technically enriching, giving you a strong foundation in both React syntax and UI logic.

This course emphasizes clarity, simplicity, and hands-on learning. You won’t be overwhelmed by advanced topics or unnecessary complexity—instead, you’ll gain practical experience through focused lessons and real code. Whether you're aiming to build your portfolio, prepare for interviews, or simply understand how React apps come to life, this project will set you on the right path.

Who this course is for:

Web developers eager to improve React skills through a practical project

Learn React JS: Build Stopwatch Project

What you'll learn

Explore related topics

Course content

Introduction1 lecture • 2min

Environment Configuration3 lectures • 4min

Source code1 lecture • 1min

Creating Stopwatch with React6 lectures • 30min

Bonus1 lecture • 1min

Requirements

Description

Who this course is for: