HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>ajaxSetup url override</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 560px; }
    button { margin-right: 8px; padding: 8px 14px; cursor: pointer; border: none; border-radius: 6px; color: #fff; }
    #same-base { background: #7c3aed; }
    #different-url { background: #64748b; }
    .log { margin-top: 14px; padding: 12px; background: #f5f3ff; border-radius: 6px; font-size: 14px; }
  </style>
</head>
<body>
  <button type="button" id="same-base">Users endpoint</button>
  <button type="button" id="different-url">Posts endpoint</button>
  <div class="log">Per-call url always wins over setup defaults.</div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $.ajaxSetup({
      url: "https://jsonplaceholder.typicode.com/users/",
      dataType: "json"
    });

    $("#same-base").on("click", function() {
      $.ajax({ url: "https://jsonplaceholder.typicode.com/users/1" })
        .done(function(user) { $(".log").text("Default base: " + user.name); });
    });

    $("#different-url").on("click", function() {
      $.ajax({ url: "https://jsonplaceholder.typicode.com/posts/1" })
        .done(function(post) { $(".log").text("Override URL: " + post.title); });
    });
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

jQuery.ajaxSetup() — per-call url override (Try It)