test_style_attr_listener.html

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<!DOCTYPE html>

<html>

  <head>

    <title>Test for Bug 1460295</title>

    <script src="/tests/SimpleTest/SimpleTest.js"></script>

    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

  </head>

  <body>

    <div></div>

    <script>

      let div = document.querySelector("div");

      let count = 0;

      div.addEventListener("DOMAttrModified", function () {

        count++;

});

      div.style.color = "green";

      is(count, 0, "No DOMAttrModified event should be triggered");

    </script>

  </body>

</html>