Build a React App from Scratch (2026)
Create a modern React project using Vite, write components, manage state with hooks, and understand the project structure. Perfect for absolute beginners.
Read full tutorial →⚛️
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📖 How to Use These Tutorials
- Pick one topic — React, Python, CSS or Git. Do not try to learn everything at once.
- Follow in order — Each guide is written so later steps build on earlier ones.
- Type the code yourself — Copy-paste is fine for checking, but typing helps memory.
- Experiment — Change values, break things on purpose, then fix them.
- Take a puzzle break — When stuck, go to the games page for 5–10 minutes.
Recommended path for absolute beginners: Git basics → CSS Flexbox/Grid → React intro → Python automation.
All Tutorials
🐍
Python Automation Scripts That Save Hours
Automate repetitive tasks: batch rename files, scrape simple websites, send emails — with short Python scripts and safety tips.
Read full tutorial →🌐
CSS Grid & Flexbox Mastery
Master Flexbox for one-dimensional layouts and CSS Grid for two-dimensional designs with practical examples and common patterns.
Read full tutorial →🔧
Git & GitHub for Absolute Beginners
Commits, branches, pull requests and how to push your first project to GitHub — explained without the jargon.
Read full tutorial →
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Build a React App from Scratch (2026 Guide)
React remains one of the most popular libraries for building user interfaces. In this tutorial you will create a complete starter project using Vite, write components, use hooks, and understand the project structure.
What you will build: A simple interactive counter app that demonstrates components, state, and event handling.
1. Prerequisites
- Node.js 18 or newer — Check with
node -v - A code editor — VS Code recommended
- Basic HTML, CSS and JavaScript
2. Create the Project with Vite
npm create vite@latest my-react-app -- --template react
cd my-react-app
npm install
npm run dev
Open the URL shown (usually http://localhost:5173). You should see the default React page.
Success: If the page loads and the counter works, your setup is correct.
3. Project Structure
- src/ — application code
- src/main.jsx — entry point
- src/App.jsx — root component
- index.html — the single HTML page
- package.json — dependencies and scripts
4. Your First Component
Replace src/App.jsx with:
import { useState } from 'react'
import './App.css'
function App() {
const [count, setCount] = useState(0)
return (
<div className="app">
<h1>Hello React!</h1>
<p>You clicked {count} times</p>
<button onClick={() => setCount(count + 1)}>Click me</button>
<button onClick={() => setCount(0)}>Reset</button>
</div>
)
}
export default App
5. Understanding useState
useState returns the current value and a setter function. Calling the setter re-renders the component. Never assign state directly.
Rule: Always use the setter (e.g. setCount) so React knows something changed.
6. Next Steps
- Split UI into smaller components
- Learn useEffect for side effects
- Add React Router for multiple pages
- Run
npm run buildand deploy to Netlify or Vercel
You now have a working React foundation.
Video Walkthrough
Replace with your own video when publishing.
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Python Automation Scripts That Save Hours
Python is excellent for automating everyday tasks. Below are three practical scripts plus safety habits.
Safety first: Always test on a copy of your files first.
1. Batch Rename Files
import os
folder = r"C:\Users\YourName\Documents\photos"
prefix = "vacation_"
files = [f for f in os.listdir(folder) if os.path.isfile(os.path.join(folder, f))]
files.sort()
for i, filename in enumerate(files, start=1):
ext = os.path.splitext(filename)[1]
new_name = f"{prefix}{i:03d}{ext}"
os.rename(os.path.join(folder, filename), os.path.join(folder, new_name))
print(f"Renamed: {filename} → {new_name}")
print("Done!")
2. Simple Web Scraper
pip install requests beautifulsoup4
import requests
from bs4 import BeautifulSoup
url = "https://example.com"
response = requests.get(url, timeout=10)
soup = BeautifulSoup(response.text, "html.parser")
for heading in soup.find_all(["h1", "h2", "h3"]):
print(heading.get_text(strip=True))
Respect websites: Do not overload servers. Prefer official APIs when available.
3. Send an Email
import smtplib
from email.message import EmailMessage
msg = EmailMessage()
msg["Subject"] = "Automated report"
msg["From"] = "you@gmail.com"
msg["To"] = "friend@example.com"
msg.set_content("Hello from a Python script.")
with smtplib.SMTP_SSL("smtp.gmail.com", 465) as smtp:
smtp.login("you@gmail.com", "your-app-password")
smtp.send_message(msg)
print("Email sent!")
Never hard-code passwords in scripts you share. Use environment variables.
Good Habits
- Test on copies of data first
- Add print statements for visibility
- Use try/except around risky operations
- Keep scripts small and focused
CSS Grid & Flexbox Mastery
Use Flexbox for one-dimensional layouts and Grid for two-dimensional designs.
Flexbox Quick Start
.container {
display: flex;
justify-content: space-between;
align-items: center;
gap: 1rem;
flex-wrap: wrap;
}
.item { flex: 1 1 200px; }
CSS Grid Quick Start
.grid {
display: grid;
grid-template-columns: repeat(3, 1fr);
gap: 1.25rem;
}
@media (max-width: 600px) {
.grid { grid-template-columns: 1fr; }
}
Common Patterns
- Holy Grail layout with Grid
- Card grids with auto-fill / minmax
- Perfect centering with flex or place-items
- Sticky footer with flex column on body
Practice: Rebuild this site layout using only Flexbox and Grid.
Git & GitHub for Absolute Beginners
Git tracks changes in code. GitHub hosts repositories and makes collaboration easy.
Essential Commands
git init
git status
git add .
git commit -m "message"
git branch
git checkout -b feature
git push -u origin main
git pull
First Repository
- Create a repo on GitHub
- In your project: git init, git add ., git commit -m "Initial commit"
- git remote add origin https://github.com/USER/REPO.git
- git push -u origin main
Done. Your files should appear on GitHub.
.gitignore Example
node_modules/
.env
.DS_Store
dist/
*.log
Never commit secrets or huge dependency folders.
🎯 What to Do After These Tutorials
- Build a tiny React app with a form
- Write one Python script that solves a real annoyance
- Recreate a layout with only Grid and Flexbox
- Push a project to GitHub
- Take the Tech Quiz to check what stuck
Consistency beats intensity: 20–30 minutes most days beats rare long sessions.
❓ Tutorial FAQ
Do I need prior coding experience?
Basic HTML/CSS/JS helps for React and CSS. Python and Git guides are written for true beginners.
Are the code examples free to use?
Yes. Copy, modify and use them in your own projects.
What if I get an error?
Read the error message. Check versions. Search the exact error text online.
Will more tutorials be added?
Yes. Check back on this page for updates.
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