ajax ile api’den veri çekmek (basit euro )
açık olan bir restapiden yararlanarak tl hesaplaması yapalım
htmlÂ
<!DOCTYPE html> <html lang="en"> <head>   <meta charset="UTF-8">   <meta name="viewport" content="width=device-width, initial-scale=1.0">   <meta http-equiv="X-UA-Compatible" content="ie=edge">   <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">   <title>Ajax Kullanımı</title> </head> <body> <div class="container">   <hr>   <label for = "amount">Euro</label>   <input type="number" id="amount" min="0">   <hr>   <button id = "change" class="btn btn-danger">Çevir</button>   <hr>   <label for = "tl">TL</label>   <input type="text" id="tl" readonly> </div> <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script> <script src="app.js"></script> </body> </html>
js
document.getElementById("change").addEventListener("click",change); function  change() {   const xhr = new XMLHttpRequest();   xhr.open("GET","https://api.exchangeratesapi.io/latest");   xhr.onload= function(){     if(this.status){       const response = JSON.parse(this.responseText);       //console.log(response.rates.TRY);       const rate = response.rates.TRY;       const amount = Number(document.getElementById("amount").value);       document.getElementById("tl").value = amount * rate;     }   }   xhr.send(); }
