JS Async: 03. AJAX: membuat ajax

HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>AJAX: membuat ajax</title>
  </head>
  <body>
    <script>

      const ajax = new XMLHttpRequest(); // membuat ajax
      ajax.open("GET", "api/hello.json"); // mengambil data dari url server
      ajax.send(); // mengirim request ke server

    </script>
  </body>
</html>

JavaScript

// file: hello.json di folder api
{
  "sayHello": "Hello Programmer Zaman Now"
}