iframe_remove_src.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/the-iframe-element/iframe_remove_src.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset=utf-8>

<title>Test that removing the src attribute of an iframe loads about:blank

  instead of whatever was loaded previously.</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<body>

  <script>

    var iframe;

    var t = async_test();

    t.step(setupFrame);

    function setupFrame() {

      iframe = document.createElement("iframe");

      iframe.src = URL.createObjectURL(new Blob(["text"], { type: "text/html" }));

      iframe.onload = t.step_func(blobLoaded);

      document.body.appendChild(iframe);

    var removalRunning = false;

    function blobLoaded() {

      assert_equals(iframe.contentDocument.location.protocol, "blob:",

                    "Should have loaded the blob");

      assert_equals(iframe.contentDocument.documentElement.textContent, "text",

                    "Should have loaded the blob text");

      iframe.onload = t.step_func_done(aboutBlankLoaded);

      removalRunning = true;

      iframe.removeAttribute("src");

      removalRunning = false;

    function aboutBlankLoaded() {

      assert_false(removalRunning, "Should not have loaded about:blank sync");

      assert_equals(iframe.contentDocument.location.href, "about:blank",

                    "Should have loaded about:blank");

      assert_equals(iframe.contentDocument.documentElement.textContent, "",

                    "Should have loaded the about:blank text");

  </script>

</body>