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Raj Aryan
Raj Aryan

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Build a Cryptocurrency Web App Using React or Next.js

#cryptocurrency #react #nextjs #css

🚀 Want to build your own crypto tracker or DApp? Here’s your beginner-friendly guide to creating a fast, modern cryptocurrency website using React.js or Next.js—complete with real APIs, UI examples, and deployment tips.

🧠 Why Use React or Next.js for Crypto Apps?

React.js and Next.js are ideal for cryptocurrency projects because:

  • ⚡️ Fast rendering (great for real-time prices)
  • 🌐 SEO-friendly (especially with Next.js)
  • 🔁 Easy to connect with crypto APIs (like CoinGecko, CoinMarketCap)
  • 📱 Mobile-ready UI frameworks like Tailwind or Material UI

🧭 Approach Overview

  1. Pick a framework: React (client-side) or Next.js (with SSR/SSG)
  2. Choose a data provider: Free crypto API like CoinGecko or CoinMarketCap
  3. Build components: Coins list, live price chart, converter, wallet integration
  4. Style UI: Tailwind, Chakra, or custom CSS
  5. Deploy: Vercel (Next.js) or Netlify (React)

⚙️ Step-by-Step Example: Build a Crypto Price Tracker

1️⃣ Setup Project

React 

npx create-react-app crypto-tracker
cd crypto-tracker
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Next.js 

npx create-next-app@latest crypto-tracker
cd crypto-tracker
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2️⃣ Fetch Real-Time Prices with CoinGecko API 

// pages/index.js (or App.jsx for React)
import { useEffect, useState } from 'react';

export default function Home() {
  const [coins, setCoins] = useState([]);

  useEffect(() => {
    fetch("https://api.coingecko.com/api/v3/coins/markets?vs_currency=usd")
      .then(res => res.json())
      .then(data => setCoins(data));
  }, []);

  return (
    <div>
      <h1>Top Cryptocurrencies</h1>
      <ul>
        {coins.map(coin => (
          <li key={coin.id}>
            <img src={coin.image} alt={coin.name} width="20" />
            {coin.name}: ${coin.current_price}
          </li>
        ))}
      </ul>
    </div>
  );
}
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3️⃣ Add Search Functionality 

<input
  type="text"
  placeholder="Search by name"
  onChange={(e) =>
    setCoins(prev =>
      prev.filter((coin) =>
        coin.name.toLowerCase().includes(e.target.value.toLowerCase())
      )
    )
  }
/>
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4️⃣ Optional: Add Chart with Chart.js or Recharts 

npm install chart.js react-chartjs-2
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Then create a chart for selected coin using its historical data.

5️⃣ Deploy on Vercel (for Next.js) or Netlify 

# For Next.js
npx vercel
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🔐 Bonus Features You Can Add

  • ✅ Wallet Connect (using MetaMask + Web3.js or ethers.js)
  • ✅ Crypto converter
  • ✅ Dark mode
  • ✅ Currency switcher (USD, INR, BTC)
  • ✅ News integration (e.g., CryptoPanic API)

💡 Pro Tips for Going Viral

  • Use getServerSideProps in Next.js to boost SEO
  • Optimize images using next/image
  • Add social sharing with Open Graph metadata
  • Deploy a custom domain (like cryptotracker.me)

🎯 Conclusion

Building a cryptocurrency app with React or Next.js is not just possible—it’s practical, fast, and highly scalable. Whether you're tracking prices or building a blockchain dashboard, this is a lucrative niche with high earning potential.

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