Created
January 22, 2023 07:23
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A sample code to use fetch in JavaScript
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| <!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</title> | |
| </head> | |
| <body> | |
| <form> | |
| <input id="currency" placeholder="Currency" type="text" list="symbolsList"> | |
| <datalist id="symbolsList"> | |
| <option value="GBP">Great Britain Pound</option> | |
| <option value="EUR">Euro</option> | |
| <option value="TRY">Turkish Lira</option> | |
| <option value="IRR">Iranian Rial</option> | |
| </datalist> | |
| <input type="submit" value="Convert"> | |
| </form> | |
| <div id="result"> | |
| </div> | |
| <script> | |
| const fetchApiOps = () => { | |
| document.querySelector('form').onsubmit = () => { | |
| document.querySelector('#result').innerHTML = 'loading...' | |
| const myHeaders = new Headers() | |
| myHeaders.append('apikey', 'iIB9mxEEebuZwLOzLWLiBqF4gsVCa7zx') | |
| const requestOptions = { | |
| method: 'GET', | |
| redirect: 'follow', | |
| headers: myHeaders | |
| } | |
| const symbol = document.querySelector('#currency').value.toUpperCase() | |
| fetch('https://api.apilayer.com/exchangerates_data/latest?' + | |
| `symbols=${symbol}&base=USD`, requestOptions) | |
| .then(response => response.json()) | |
| .then(data => { | |
| console.log(data) | |
| if (!data.error) { | |
| const rate = data.rates[symbol] | |
| document.querySelector('#result').innerHTML = | |
| `1 USD is ${rate.toFixed(2)} ${symbol}.` | |
| } else { | |
| document.querySelector('#result').innerHTML = "Not found" | |
| } | |
| }) | |
| .catch(error => { | |
| document.querySelector('#result').innerHTML = 'An error happend :(' | |
| console.log('ERR:', error) | |
| }) | |
| return false | |
| } | |
| } | |
| document.addEventListener('DOMContentLoaded', fetchApiOps) | |
| </script> | |
| </body> | |
| </html> |
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