File: focus-tabindex-default-value.html

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<!DOCTYPE html>
<meta charset="utf-8">
<title>HTML Test: focus - default value of tabindex</title>
<link rel="author" title="Intel" href="http://www.intel.com/">
<link rel="help" href="https://html.spec.whatwg.org/multipage/#sequential-focus-navigation-and-the-tabindex-attribute">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<button id="test1">TEST1</button>
<div id="test2">TEST2</div>
<script>

test(function() {
  assert_equals(document.getElementById("test1").tabIndex, 0, "The value of tabIndex attribute should be 0.");
}, "The default value of tabIndex attribute must be 0 for elements that are focusable");

test(function() {
  assert_equals(document.getElementById("test2").tabIndex, -1, "The value of tabIndex attribute should be -1.");
}, "The default value of tabIndex attribute must be -1 for elements that are not focusable");

</script>