document.writeln-02.html

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This WPT test may be referenced by the following Test IDs:
- /html/webappapis/dynamic-markup-insertion/document-writeln/document.writeln-02.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>document.writeln and null/undefined</title>

<link rel="author" title="Ms2ger" href="mailto:ms2ger@gmail.com">

<link rel="help" href="https://html.spec.whatwg.org/multipage/#dom-document-writeln%28%29">

<link rel="help" href="https://html.spec.whatwg.org/multipage/#documents-in-the-dom">

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

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

<div id="log"></div>

<script>

test(function() {

  var iframe = document.createElement("iframe");

  document.body.appendChild(iframe);

  doc = iframe.contentDocument;

  test(function() {

    doc.open();

    doc.writeln(null);

    doc.close();

    assert_equals(doc.documentElement.textContent, "null\n");

  }, "document.writeln(null)");

  test(function() {

    doc.open();

    doc.writeln(undefined);

    doc.close();

    assert_equals(doc.documentElement.textContent, "undefined\n");

  }, "document.writeln(undefined)");

}, "Calling document.writeln with null and undefined");

</script>