HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>path=/shop cookie</title>
</head>
<body>
  <h1>Scoped to /shop</h1>
  <button type="button" id="run">Set cartId</button>
  <pre id="out"></pre>
  <script>
    document.getElementById("run").addEventListener("click", function () {
      document.cookie = "cartId=xyz789; path=/shop; max-age=604800";
      var visible = document.cookie.indexOf("cartId=") !== -1;
      document.getElementById("out").textContent =
        "Set cartId with path=/shop\n" +
        "Visible on this page: " + visible + "\n\n" +
        "document.cookie:\n" + (document.cookie || "(empty)");
    });
  </script>
</body>
</html>

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JavaScript Cookies Path — /shop scope (Try It)