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<!DOCTYPE html>
<meta charset="utf-8">
<meta name="timeout" content="long">
<title>NDEFReader.makeReadOnly respect page visibility changes</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
promise_test(async t => {
const ndef = new NDEFReader();
const p1 = ndef.makeReadOnly();
return await new Promise((resolve, reject) => {
p1.then(() => {
assert_false(document.hidden);
resolve();
}).catch(e => {
reject();
});
});
}, "Test NDEFReader.makeReadOnly operation should be suspended when document is not visible");
</script>
<p>Step1: switch the page to the background, then tap an NFC tag.</p>
<p>Step2: switch back to the page, then tap the tag again.</p>