What is the reason for the absence of CORS restriction in this code snippet?

I've tested this code across various browsers and it seems to be working perfectly fine. Can someone explain why this is happening? What am I overlooking here?

<html>
  <body>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
    <script>
$.ajax({
  url: 'https://randomuser.me/api/',
  dataType: 'json',
  success: function(data) {
    alert(data.results[0].name.first);
  }
});
</script>
    </body>
</html>

Answer №1

randomuser.me includes the access-control-allow-origin header in its response with the value *, indicating to the browser that cross-origin requests are permitted:

https://i.sstatic.net/uqO8O.png

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