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<!DOCTYPE html>
<script>
'use strict';
window.onload = async function() {
let enabled = true;
try {
const ctx = new AudioContext();
// Use a non-empty fake device ID to trigger permission check.
await ctx.setSinkId("fake_device_id");
} catch (e) {
if (e.name === 'NotAllowedError') {
enabled = false;
} else if (e.name === 'NotFoundError') {
enabled = true;
} else {
// Unexpected error
enabled = false;
}
}
parent.postMessage({ type: 'availability-result', enabled }, '*');
}
</script>