Abhishek Gurjar

Posted on Sep 13

Building a Crypto Finder App with React

#css #javascript #react #cryptofinder

Introduction

Cryptocurrencies are all the rage these days, and with the plethora of coins available, it’s essential to have a tool to easily search and view details about them. The Crypto Finder app does just that. Built with React, this app provides a seamless experience for users to search, filter, and view cryptocurrency details.

Project Overview

The Crypto Finder app consists of:

A Search Interface: Users can search for cryptocurrencies by name.
A List of Cryptocurrencies: Displayed as cards, showing basic information.
Detailed View: Clicking on a cryptocurrency card shows more detailed information about that coin.

Features

Search Functionality: Filter cryptocurrencies by name.
Dynamic Routing: View detailed information of a selected cryptocurrency.
Responsive Design: Ensures the app looks good on different screen sizes.
Loading Indicators: Show a loader while data is being fetched.

Technologies Used

React: For building the user interface.
Axios: For making HTTP requests.
React Router: For routing and navigation.
CoinGecko API: For fetching cryptocurrency data.

Project Structure

Here’s a quick overview of the project structure:

src/
- components/
- CryptoFinder.js
- CryptoDetails.js
- Navbar.js
- Footer.js
- App.js
- App.css

Installation

To get started with the Crypto Finder app, follow these steps:

Clone the Repository

   git clone https://github.com/abhishekgurjar-in/Crypto-Finder
   cd crypto-finder

Install Dependencies

   npm install

Start the Development Server

   npm start

Open your browser and navigate to http://localhost:3000 to see the app in action.

Usage

Search for Cryptocurrencies: Type in the search box and click "Search" to filter the list of cryptocurrencies.
View Details: Click on a cryptocurrency card to view detailed information.

Code Explanation

App Component

The App.js component sets up the routing and includes the Navbar and Footer components.

import React from "react";
import CryptoFinder from "./components/CryptoFinder";
import "./App.css";
import Navbar from "./components/Navbar";
import Footer from "./components/Footer";
import {Route,Routes} from "react-router-dom"
import CryptoDetails from "./components/CryptoDetails";
const App = () => {
  return (
    <div>
      <Navbar />
      <Routes>
        <Route path="/" element={<CryptoFinder/>}/>
        <Route path="/details/:id" element={<CryptoDetails/>}/>
      </Routes>

      <Footer />
    </div>
  );
};

export default App;

CryptoFinder Component

The CryptoFinder.js component handles fetching and displaying the list of cryptocurrencies. It includes a search bar for filtering results.

import React, { useEffect, useState } from "react";
import axios from "axios";
import { Link } from "react-router-dom";

const CryptoFinder = () => {
  const [search, setSearch] = useState("");
  const [crypto, setCrypto] = useState([]);
  const [filteredCrypto, setFilteredCrypto] = useState([]);

  useEffect(() => {
    axios
      .get(`https://api.coingecko.com/api/v3/coins/markets`, {
        params: {
          vs_currency: "inr",
          order: "market_cap_desc",
          per_page: 100,
          page: 1,
          sparkline: false,
        },
      })
      .then((res) => {
        setCrypto(res.data);
        setFilteredCrypto(res.data);
      });
  }, []);

  const handleSearch = () => {
    const filteredData = crypto.filter((data) => {
      return data.name.toLowerCase().includes(search.toLowerCase());
    });
    setFilteredCrypto(filteredData);
  };

  if (crypto.length === 0) {
    return (
      <div className="loader-box">
        <div className="loader"></div>
      </div>
    );
  }

  return (
    <div className="crypto-finder">
      <div className="input-box">
        <input
          type="text"
          value={search}
          onChange={(e) => setSearch(e.target.value)}
          onKeyDown={handleSearch}
          placeholder="Search for a cryptocurrency"
        />
        <button onClick={handleSearch}>Search</button>
      </div>
      <div className="cards">
        {filteredCrypto.map((val, id) => (
          <div className="card" key={id}>
            <img src={val.image} alt={val.name} />
            <h1>{val.name}</h1>
            <h4>{val.symbol.toUpperCase()}</h4>
            <h4>₹{val.current_price.toFixed(2)}</h4>
            <Link to={`/details/${val.id}`}>
              <button>View Details</button>
            </Link>
          </div>
        ))}
      </div>
    </div>
  );
};

export default CryptoFinder;

CryptoDetails Component

The CryptoDetails.js component fetches and displays detailed information about a selected cryptocurrency.

import React, { useEffect, useState } from "react";
import axios from "axios";
import { useParams } from "react-router-dom";

const CryptoDetails = () => {
  const { id } = useParams();
  const [cryptoDetails, setCryptoDetails] = useState(null);

  useEffect(() => {
    axios
      .get(`https://api.coingecko.com/api/v3/coins/${id}`, {
        params: {
          localization: false,
        },
      })
      .then((res) => {
        setCryptoDetails(res.data);
      });
  }, [id]);

  if (!cryptoDetails) {
    return (
      <div className="loader-box">
        <div className="loader"></div>
      </div>
    );
  }

  return (
    <div className="crypto-details">
      <div className="basic-details-image-box">
        <div className="basic-details">
          <h1>{cryptoDetails.name}</h1>
          <h4>{cryptoDetails.symbol.toUpperCase()}</h4>
          <h4>
            Current Price: ₹
            {cryptoDetails.market_data.current_price.inr.toFixed(2)}
          </h4>
        </div>
        <div className="image-box">
          <img src={cryptoDetails.image.large} alt={cryptoDetails.name} />
        </div>
      </div>
      <div className="detail-desc">
      <h3>Description :</h3>
      <p >{cryptoDetails.description.en}</p>
      </div>


  <div className="market-and-additional">
  <div className="market-data">
        <h2>Market Data</h2>
        <p>
          <b>Market Cap: </b>₹
          {cryptoDetails.market_data.market_cap.inr.toLocaleString()}
        </p>
        <p>
          <b>Total Volume: </b>₹
          {cryptoDetails.market_data.total_volume.inr.toLocaleString()}
        </p>
        <p><b>24h High:</b> ₹{cryptoDetails.market_data.high_24h.inr}</p>
        <p><b>24h Low:</b> ₹{cryptoDetails.market_data.low_24h.inr}</p>
        <p>
         <b> Price Change (24h):</b> ₹
          {cryptoDetails.market_data.price_change_24h.toFixed(2)}
        </p>
        <p>
          <b>Price Change Percentage (24h):</b>{" "}
          {cryptoDetails.market_data.price_change_percentage_24h.toFixed(2)}%
        </p>
      </div>

      <div className="additional-info">
        <h2>Additional Information</h2>
        <p><b>Genesis Date:</b> {cryptoDetails.genesis_date || "N/A"}</p>
        <p>
          <b>Homepage:</b>{" "}
          <a
            href={cryptoDetails.links.homepage[0]}
            target="_blank"
            rel="noopener noreferrer"
          >
            {cryptoDetails.links.homepage[0]}
          </a>
        </p>
        <p>
         <b> Blockchain Site:</b>{" "}
          <a
            href={cryptoDetails.links.blockchain_site[0]}
            target="_blank"
            rel="noopener noreferrer"
          >
            {cryptoDetails.links.blockchain_site[0]}
          </a>
        </p>
      </div>
  </div>
    </div>
  );
};

export default CryptoDetails;

Navbar Component

The Navbar.js component provides a header for the app.

import React from 'react'

const Navbar = () => {
  return (
    <div className="navbar">
    <h1>Crypto Finder</h1>
  </div>
  )
}

export default Navbar

Footer Component

The Footer.js component provides a footer for the app.

import React from 'react'

const Footer = () => {
  return (
    <div className="footer">
    <p>Made with ❤️ by Abhishek Gurjar</p>
  </div>
  )
}

export default Footer

Live Demo

You can view the live demo of the Crypto Finder app here.

Conclusion

Building the Crypto Finder app was a fun and educational experience. It demonstrates how to use React for fetching and displaying data, handling routing, and creating a responsive and user-friendly interface. I hope you find this project helpful and that it inspires you to create your own applications with React!

Credits

React Documentation: React Docs
CoinGecko API: CoinGecko
Axios Documentation: Axios Docs

Author