Currency Converter in JavaScript
In this article, we will implement a currency converter that simply converts the currency into any other country’s currency.
Pre-requisites:
- Basic HTML, CSS, JavaScript.
Approach:
- HTML code is implemented for GUI for user entries of the amount and two currencies.
- Select the currency, Convert button displays the converted amount.
- The Reset button resets the data.
- JavaScript functions and custom methods are used for implementing currency conversion like addEventListener().
- Currency exchange API is used in the script file.
HTML code: The following HTML code implements the GUI for user entries like amount and both the currencies for which the conversion needs to take place.
Add code in index.html.
CSS code: The following is the content for the file “style.css”.
JavaScript code: The following is the content for the file “script.js” used in the above HTML code.
HTML
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Currency Converter</title> <link rel="stylesheet" href= <script src= </script> <script src= </script> <script src= </script> <link rel="preconnect" href= <link href= rel="stylesheet"> <!-- linking style.css file--> <link rel="stylesheet" href="style.css"></head><body> <!-- Currency Converter --> <h1 class="heading text-center display-2"> Currency Converter </h1> <hr> <div class="container"> <div class="main"> <div class="form-group"> <label for="oamount"> Amount to Convert : </label> <input type="text" class="form-control searchBox" placeholder="0.00" id="oamount"> </div> <div class="row"> <div class="col-sm-6"> <div class="input-group mb-3"> <div class="input-group-prepend"> <span class="input-group-text">From</span> </div> <select class="form-control from" id="sel1"> <option value="">Select One …</option> <option value="USD">USD</option> <option value="AED">AED</option> <option value="ARS">ARS</option> <option value="AUD">AUD</option> <option value="BGN">BGN</option> <option value="BRL">BRL</option> <option value="BSD">BSD</option> <option value="CAD">CAD</option> <option value="CHF">CHF</option> <option value="CLP">CLP</option> <option value="CNY">CNY</option> <option value="COP">COP</option> <option value="CZK">CZK</option> <option value="DKK">DKK</option> <option value="DOP">DOP</option> <option value="EGP">EGP</option> <option value="EUR">EUR</option> <option value="FJD">FJD</option> <option value="GBP">GBP</option> <option value="GTQ">GTQ</option> <option value="HKD">HKD</option> <option value="HRK">HRK</option> <option value="HUF">HUF</option> <option value="IDR">IDR</option> <option value="ILS">ILS</option> <option value="INR">INR</option> <option value="ISK">ISK</option> <option value="JPY">JPY</option> <option value="KRW">KRW</option> <option value="KZT">KZT</option> <option value="MVR">MVR</option> <option value="MXN">MXN</option> <option value="MYR">MYR</option> <option value="NOK">NOK</option> <option value="NZD">NZD</option> <option value="PAB">PAB</option> <option value="PEN">PEN</option> <option value="PHP">PHP</option> <option value="PKR">PKR</option> <option value="PLN">PLN</option> <option value="PYG">PYG</option> <option value="RON">RON</option> <option value="RUB">RUB</option> <option value="SAR">SAR</option> <option value="SEK">SEK</option> <option value="SGD">SGD</option> <option value="THB">THB</option> <option value="TRY">TRY</option> <option value="TWD">TWD</option> <option value="UAH">UAH</option> <option value="UYU">UYU</option> <option value="ZAR">ZAR</option> </select> </div> </div> <div class="col-sm-6"> <div class="input-group mb-3"> <div class="input-group-prepend"> <span class="input-group-text">To</span> </div> <select class="form-control to" id="sel2"> <option value="">Select One …</option> <option value="USD">USD</option> <option value="AED">AED</option> <option value="ARS">ARS</option> <option value="AUD">AUD</option> <option value="BGN">BGN</option> <option value="BRL">BRL</option> <option value="BSD">BSD</option> <option value="CAD">CAD</option> <option value="CHF">CHF</option> <option value="CLP">CLP</option> <option value="CNY">CNY</option> <option value="COP">COP</option> <option value="CZK">CZK</option> <option value="DKK">DKK</option> <option value="DOP">DOP</option> <option value="EGP">EGP</option> <option value="EUR">EUR</option> <option value="FJD">FJD</option> <option value="GBP">GBP</option> <option value="GTQ">GTQ</option> <option value="HKD">HKD</option> <option value="HRK">HRK</option> <option value="HUF">HUF</option> <option value="IDR">IDR</option> <option value="ILS">ILS</option> <option value="INR">INR</option> <option value="ISK">ISK</option> <option value="JPY">JPY</option> <option value="KRW">KRW</option> <option value="KZT">KZT</option> <option value="MVR">MVR</option> <option value="MXN">MXN</option> <option value="MYR">MYR</option> <option value="NOK">NOK</option> <option value="NZD">NZD</option> <option value="PAB">PAB</option> <option value="PEN">PEN</option> <option value="PHP">PHP</option> <option value="PKR">PKR</option> <option value="PLN">PLN</option> <option value="PYG">PYG</option> <option value="RON">RON</option> <option value="RUB">RUB</option> <option value="SAR">SAR</option> <option value="SEK">SEK</option> <option value="SGD">SGD</option> <option value="THB">THB</option> <option value="TRY">TRY</option> <option value="TWD">TWD</option> <option value="UAH">UAH</option> <option value="UYU">UYU</option> <option value="ZAR">ZAR</option> </select> </div> </div> </div> <div class="text-center"> <!-- convert button --> <button class="btn btn-primary convert m-2" type="submit"> Convert </button> <!-- reset button --> <button class="btn btn-primary m-2" onclick="clearVal()"> Reset </button> </div> </div> <div id="finalAmount" class="text-center"> <!-- Display the converted amount --> <h2>Converted Amount : <span class="finalValue" style="color:green;"> </span> </h2> </div> </div> <!-- linking script.js file --> <script src="script.js"></script></body></html> |
CSS
body { background-color: aliceblue; background-position: center; background-size: cover; background-attachment: fixed; background-repeat: no-repeat;}.heading { font-family: 'Pacifico', cursive; margin: 35px auto 20px;}hr { border-top: 2px solid black; width: 40%; margin-bottom: 55px;}.main { width: 50vw; margin: auto; padding: 30px; border-radius: 5px; background-color: rgba(0, 0, 0, 0.5); color: white;}label { font-size: 20px;}.btn { width: 200px;}#finalAmount { font-family: 'Lobster', cursive; display: none; margin: 50px auto;}#finalAmount h2 { font-size: 50px;}.finalValue { font-family: 'Amiri', serif;}@media (max-width: 768px) { hr { width: 60%; } .main { width: 100%; }}@media (max-width: 400px) { .heading { font-size: 60px; } hr { width: 75%; } #finalAmount h2, .finalValue { font-size: 40px; }} |
Javascript
// Include api for currency change// For selecting different controlsvar search = document.querySelector(".searchBox");var convert = document.querySelector(".convert");var fromCurrecy = document.querySelector(".from");var toCurrecy = document.querySelector(".to");var finalValue = document.querySelector(".finalValue");var finalAmount = document.getElementById("finalAmount");var resultFrom;var resultTo;var searchValue;// Event when currency is changedfromCurrecy.addEventListener('change', (event) => { resultFrom = `${event.target.value}`;});// Event when currency is changedtoCurrecy.addEventListener('change', (event) => { resultTo = `${event.target.value}`;});search.addEventListener('input', updateValue);// Function for updating valuefunction updateValue(e) { searchValue = e.target.value;}// When user clicks, it calls function getresults convert.addEventListener("click", getResults);// Function getresultsfunction getResults() { fetch(`${api}`) .then(currency => { return currency.json(); }).then(displayResults);}// Display results after conversionfunction displayResults(currency) { let fromRate = currency.rates[resultFrom]; let toRate = currency.rates[resultTo]; finalValue.innerHTML = ((toRate / fromRate) * searchValue).toFixed(2); finalAmount.style.display = "block";}// When user click on reset buttonfunction clearVal() { window.location.reload(); document.getElementsByClassName("finalValue").innerHTML = "";}; |
Output:
Currency Converter in JavaScript
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