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Build A Currency Converter in ReactJS Source Code

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32 5 minutes read
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By building this currency converter project using React js and CSS, you can gain the following skills:

  • ReactJS Fundamentals: You’ll get much experience with React components, state management, and hooks.
  • API Integration: Figure out how to communicate with web administrations, handle nonconcurrent tasks, and oversee information bringing in Respond.
  • CSS Skills: Without relying on pre-built components, learn how to create a responsive and visually appealing user interface.
  • Practical Application: This project gives you a concrete outcome that you can use in real-world situations or show off in your portfolio.

Setting Up the Project

Before we begin making the cash converter with ReactJS and CSS, ensure you have Node.js introduced on your PC. You can get it from the official Node.js website and install it if you don’t already have it.

Create a Project Folder:

  • Make a new folder, for instance, “currency-converter”.
  • Open this folder in your VS Code editor.

Initialize the Project:

Open your terminal by pressing Ctrl + J and then use Vite to create a new React app with this command:

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npm create vite@latest ./ -- --template react

Install necessary dependencies and start the development server:

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npm install
npm run dev

Congratulations if your project is running in your browser. Your project setup went well for you. Let’s move on to the next step, which involves changing files and folders.

Modify folder and CSS Files:

  • Remove the default assets folder and App.css file.
  • Download the bg.png image and place it inside the public folder.
  • Replace the content of index.css with the provided code.

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/* Import Google Font */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,100..900;1,100..900&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Montserrat", sans-serif;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: url("bg.png") #030728 no-repeat center;
}

#root {
  width: 100%;
}

.currency-converter {
  max-width: 410px;
  margin: 0 auto;
  padding: 40px 30px 50px;
  border-radius: 8px;
  backdrop-filter: blur(30px);
  background: rgba(2, 7, 40, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.currency-converter .converter-title {
  color: #fff;
  font-size: 1.65rem;
  font-weight: 600;
  text-align: center;
}

.currency-converter .converter-form {
  margin-top: 45px;
}

.converter-form .form-group {
  display: flex;
  margin-bottom: 30px;
  flex-direction: column;
}

.converter-form .form-group .form-label {
  color: #fff;
  font-weight: 500;
  display: block;
  margin-bottom: 9px;
  font-size: 1rem;
}

.converter-form .form-group .form-input {
  outline: none;
  font-size: 1.1rem;
  padding: 0 15px;
  color: #fff;
  font-weight: 500;
  min-height: 48px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.converter-form .form-currency-group {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

.form-currency-group .currency-select {
  display: flex;
  padding: 0 10px;
  min-height: 45px;
  align-items: center;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.form-currency-group .currency-select img {
  width: 25px;
}

.form-currency-group .currency-select .currency-dropdown {
  outline: none;
  border: none;
  background: none;
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  padding: 0 10px 0 5px;
}

.form-currency-group .currency-select .currency-dropdown option {
  color: #000;
  font-weight: 500;
}

.form-currency-group .swap-icon {
  height: 40px;
  width: 40px;
  cursor: pointer;
  display: flex;
  margin-top: 25px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.5);
  transition: 0.2s ease;
}

.form-currency-group .swap-icon:hover {
  background: rgba(255, 255, 255, 0.3);
}

.converter-form .submit-button {
  width: 100%;
  min-height: 52px;
  border-radius: 6px;
  border: none;
  outline: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 5px;
  transition: 0.2s ease;
}

.converter-form .submit-button.loading {
  opacity: 0.7;
  pointer-events: none;
}

.converter-form .submit-button:hover {
  background: rgba(255, 255, 255, 0.7);
}

.converter-form .exchange-rate-result {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  text-align: center;
  padding: 25px 0;
  margin-top: 25px;
  border-radius: 6px;
  letter-spacing: 0.5px;
  background: rgba(255, 255, 255, 0.15);
}

@media (max-width: 640px) {
  body {
    padding: 0 10px;
  }

  .currency-converter {
    padding: 30px 20px 40px;
  }
}

Creating the Components

Create a “components” folder to organize your project’s files in the src directory. Make the following files in the components folder:

  • ConverterForm.jsx
  • CurrencySelect.jsx

Adding the Codes

Add the respective code to each newly created file. These files define the layout and functionality of the currency converter.

In components/ConverterForm.jsx, add the code for rendering the converter form, and fetch the exchange rate with an API call.

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import { useEffect, useState } from "react";
import CurrencySelect from "./CurrencySelect";

const ConverterForm = () => {
    const [amount, setAmount] = useState(100);
    const [fromCurrency, setFromCurrency] = useState("USD");
    const [toCurrency, setToCurrency] = useState("INR");
    const [result, setResult] = useState("");
    const [isLoading, setIsLoading] = useState(false);

    // Swap the values of fromCurrency and toCurrency
    const handleSwapCurrencies = () => {
        setFromCurrency(toCurrency);
        setToCurrency(fromCurrency);
    }

    // Function to fetch the exchange rate and update the result
    const getExchangeRate = async () => {
        const API_KEY = "PASTE-YOUR-API-KEY";
        const API_URL = `https://v6.exchangerate-api.com/v6/${API_KEY}/pair/${fromCurrency}/${toCurrency}`;

        if (isLoading) return;
        setIsLoading(true);

        try {
            const response = await fetch(API_URL);
            if (!response.ok) throw Error("Something went wrong!");

            const data = await response.json();
            const rate = (data.conversion_rate * amount).toFixed(2);
            setResult(`${amount} ${fromCurrency} = ${rate} ${toCurrency}`);
        } catch (error) {
            setResult("Something went wrong!");
        } finally {
            setIsLoading(false);
        }
    }

    // Handle form submission
    const handleFormSubmit = (e) => {
        e.preventDefault();
        getExchangeRate();
    }

    // Fetch exchange rate on initial render
    // eslint-disable-next-line react-hooks/exhaustive-deps
    useEffect(() => getExchangeRate, []);

    return (
        <form className="converter-form" onSubmit={handleFormSubmit}>
            <div className="form-group">
                <label className="form-label">Enter Amount</label>
                <input
                    type="number"
                    className="form-input"
                    value={amount}
                    onChange={(e) => setAmount(e.target.value)}
                    required
                />
            </div>

            <div className="form-group form-currency-group">
                <div className="form-section">
                    <label className="form-label">From</label>
                    <CurrencySelect
                        selectedCurrency={fromCurrency}
                        handleCurrency={e => setFromCurrency(e.target.value)}
                    />
                </div>

                <div className="swap-icon" onClick={handleSwapCurrencies}>
                    <svg width="16" viewBox="0 0 20 19" xmlns="http://www.w3.org/2000/svg">
                        <path d="M19.13 11.66H.22a.22.22 0 0 0-.22.22v1.62a.22.22 0 0 0 .22.22h16.45l-3.92 4.94a.22.22 0 0 0 .17.35h1.97c.13 0 .25-.06.33-.16l4.59-5.78a.9.9 0 0 0-.7-1.43zM19.78 5.29H3.34L7.26.35A.22.22 0 0 0 7.09 0H5.12a.22.22 0 0 0-.34.16L.19 5.94a.9.9 0 0 0 .68 1.4H19.78a.22.22 0 0 0 .22-.22V5.51a.22.22 0 0 0-.22-.22z"
                            fill="#fff" />
                    </svg>
                </div>

                <div className="form-section">
                    <label className="form-label">To</label>
                    <CurrencySelect
                        selectedCurrency={toCurrency}
                        handleCurrency={e => setToCurrency(e.target.value)}
                    />
                </div>
            </div>

            <button type="submit" className={`${isLoading ? "loading" : ""} submit-button`}>Get Exchange Rate</button>
            <p className="exchange-rate-result">
                {/* Display the conversion result */}
                {isLoading ? "Getting exchange rate..." : result}
            </p>
        </form>
    )
}

export default ConverterForm

Remember to paste your API key into the API_KEY variable within the getExchangeRate() function. For security, consider storing your API key in a .env file in your project’s root directory. You can get a free API key from the ExchangeRate-API website.

In components/CurrencySelect.jsx, add the code for rendering the currency selection dropdowns.

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// Array of currency codes
const currencyCodes = [
    "AED", "AFN", "ALL", "AMD", "ANG", "AOA", "ARS", "AUD", "AWG", "AZN",
    "BAM", "BBD", "BDT", "BGN", "BHD", "BIF", "BMD", "BND", "BOB", "BRL",
    "BSD", "BTN", "BWP", "BYN", "BZD", "CAD", "CDF", "CHF", "CLP", "CNY",
    "COP", "CRC", "CUP", "CVE", "CZK", "DJF", "DKK", "DOP", "DZD", "EGP",
    "ERN", "ETB", "EUR", "FJD", "FKP", "FOK", "GBP", "GEL", "GGP", "GHS",
    "GIP", "GMD", "GNF", "GTQ", "GYD", "HKD", "HNL", "HRK", "HTG", "HUF",
    "IDR", "ILS", "IMP", "INR", "IQD", "IRR", "ISK", "JEP", "JMD", "JOD",
    "JPY", "KES", "KGS", "KHR", "KID", "KMF", "KRW", "KWD", "KYD", "KZT",
    "LAK", "LBP", "LKR", "LRD", "LSL", "LYD", "MAD", "MDL", "MGA", "MKD",
    "MMK", "MNT", "MOP", "MRU", "MUR", "MVR", "MWK", "MXN", "MYR", "MZN",
    "NAD", "NGN", "NIO", "NOK", "NPR", "NZD", "OMR", "PAB", "PEN", "PGK",
    "PHP", "PKR", "PLN", "PYG", "QAR", "RON", "RSD", "RUB", "RWF", "SAR",
    "SBD", "SCR", "SDG", "SEK", "SGD", "SHP", "SLE", "SLL", "SOS", "SRD",
    "SSP", "STN", "SYP", "SZL", "THB", "TJS", "TMT", "TND", "TOP", "TRY",
    "TTD", "TVD", "TWD", "TZS", "UAH", "UGX", "USD", "UYU", "UZS", "VES",
    "VND", "VUV", "WST", "XAF", "XCD", "XOF", "XPF", "YER", "ZAR", "ZMW",
    "ZWL"
];

const CurrencySelect = ({ selectedCurrency, handleCurrency }) => {
    // Extract the country code from the selected currency code
    const countryCode = selectedCurrency.substring(0, 2);

    return (
        <div className="currency-select">
            <img src={`https://flagsapi.com/${countryCode}/flat/64.png`} alt="Flag" />
            <select
                onChange={handleCurrency}
                className="currency-dropdown"
                value={selectedCurrency}
            >
                {currencyCodes.map(currency => (
                    <option key={currency} value={currency}>{currency}</option>
                ))}
            </select>
        </div>
    )
}

export default CurrencySelect

Finally, replace the content of src/App.jsx with the provided code. It imports and renders the ConverterForm component.

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import ConverterForm from "./components/ConverterForm";

const App = () => {
  return (
    <div className="currency-converter">
      <h2 className="converter-title">Currency Converter</h2>
      <ConverterForm />
    </div>
  )
}

export default App;
Photo of Bankygold7904 Bankygold7904 Send an email
32 5 minutes read
Photo of Bankygold7904

Bankygold7904

Exousia Media @ https://exousiaamedia.com

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