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<!DOCTYPE HTML>
<title>HTMLOptionElement.prototype.index</title>
<link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me">
<link rel="help" href="https://html.spec.whatwg.org/multipage/#dom-option-index">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<select>
<option id="option0">hello</option>
<option id="option1">hello</option>
</select>
<datalist>
<option id="dl-option0">hello</option>
<option id="dl-option1">hello</option>
</datalist>
<option id="doc-option0">hello</option>
<option id="doc-option1">hello</option>
<script>
"use strict";
test(() => {
assert_equals(document.querySelector("#option0").index, 0);
assert_equals(document.querySelector("#option1").index, 1);
}, "option index should work inside the document");
test(() => {
assert_equals(document.querySelector("#dl-option0").index, 0);
assert_equals(document.querySelector("#dl-option1").index, 0);
}, "option index should always be 0 for options in datalists");
test(() => {
assert_equals(document.querySelector("#doc-option0").index, 0);
assert_equals(document.querySelector("#doc-option1").index, 0);
}, "option index should always be 0 for options with no container");
test(() => {
assert_equals(document.createElement("option").index, 0);
assert_equals(document.createElement("option").index, 0);
}, "option index should always be 0 for options not even in the document");
</script>
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