<!DOCTYPE html> <meta charset=utf-8> <title>Test for constraint validation of form controls not in documents</title> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <div id="log"></div> <script> test(function() { var input = document.createElement('input'); input.required = true; assert_false(input.checkValidity()); }, "Should validate input not in document"); test(function() { var textarea = document.createElement('textarea'); textarea.required = true; assert_false(textarea.checkValidity()); }, "Should validate textarea not in document"); </script>