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<!DOCTYPE html>
<meta charset="utf-8" />
<title>Canvas descendants focusability</title>
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
<link rel="help" href="https://html.spec.whatwg.org/multipage/canvas.html#being-used-as-relevant-canvas-fallback-content">
<link rel="help" href="https://html.spec.whatwg.org/multipage/interaction.html#focusable-area">
<meta name="assert" content="Checks that descendants of a non-rendered canvas
aren't relevant canvas fallback content, so they aren't focusable.">
<div id="log"></div>
<canvas hidden>
<button data-focusable="false"></button>
<section tabindex="-1" data-focusable="false">
<div tabindex="-1" data-focusable="false"></div>
<span tabindex="-1" data-focusable="false"></span>
<a href="#" data-focusable="false"></a>
</section>
</canvas>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
setup(() => {
const canvas = document.querySelector("canvas");
assert_equals(canvas.getClientRects().length, 0, "Canvas not rendered");
});
for (let element of document.querySelectorAll("[data-focusable]")) {
let title = element.cloneNode(false).outerHTML.toLowerCase();
title = title.slice(0, title.lastIndexOf("<"));
test(function() {
assert_equals(element.getClientRects().length, 0, "Not rendered");
assert_true(document.activeElement !== element, "Not initially focused");
element.focus();
if (JSON.parse(element.dataset.focusable)) {
assert_true(document.activeElement === element, "Should be focused");
} else {
assert_true(document.activeElement !== element, "Shouldn't be focused");
}
}, title);
}
</script>
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