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<!doctype html>
<meta charset="utf-8" />
<link rel="author" title="Keith Cirkel" href="mailto:keithamus@github.com" >
<link rel="author" title="Luke Warlow" href="mailto:lwarlow@igalia.com" >
<link rel="help" href="https://open-ui.org/components/interest-invokers.explainer/" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<button id="buttonInvoker" interestfor="interestee"></button>
<a id="aInvoker" interestfor="interestee"></a>
<div id="interestee"></div>
<script>
test(function () {
assert_equals(buttonInvoker.interestForElement, interestee);
assert_equals(aInvoker.interestForElement, interestee);
}, "interestForElement reflects interestee HTML element");
test(function () {
const div = document.body.appendChild(document.createElement("div"));
buttonInvoker.interestForElement = div;
aInvoker.interestForElement = div;
assert_equals(buttonInvoker.interestForElement, div);
assert_equals(buttonInvoker.getAttribute("interestfor"), "");
assert_equals(aInvoker.interestForElement, div);
assert_equals(aInvoker.getAttribute("interestfor"), "");
}, "interestForElement reflects set value");
test(function () {
const host = document.body.appendChild(document.createElement("div"));
const shadow = host.attachShadow({ mode: "open" });
const button = shadow.appendChild(document.createElement("button"));
button.interestForElement = interestee;
assert_equals(button.interestForElement, interestee);
assert_equals(buttonInvoker.getAttribute("interestfor"), "");
}, "interestForElement reflects set value across shadow root into light dom");
test(function () {
const host = document.body.appendChild(document.createElement("div"));
const shadow = host.attachShadow({ mode: "open" });
const div = shadow.appendChild(document.createElement("div"));
buttonInvoker.interestForElement = div;
assert_equals(buttonInvoker.interestForElement, null);
assert_equals(buttonInvoker.getAttribute("interestfor"), "");
}, "interestForElement does not reflect set value inside shadowroot");
test(function () {
buttonInvoker.setAttribute('interestfor', 'invalid');
assert_equals(buttonInvoker.interestForElement, null);
assert_equals(buttonInvoker.getAttribute("interestfor"), "invalid");
aInvoker.setAttribute('interestfor', 'invalid');
assert_equals(aInvoker.interestForElement, null);
assert_equals(aInvoker.getAttribute("interestfor"), "invalid");
}, "interestForElement does not reflect invalid value");
test(function () {
assert_throws_js(
TypeError,
function () {
buttonInvoker.interestForElement = {};
},
"interestForElement attribute value must be an instance of Element",
);
assert_throws_js(
TypeError,
function () {
aInvoker.interestForElement = {};
},
"interestForElement attribute value must be an instance of Element",
);
}, "interestForElement throws error on assignment of non Element");
</script>
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