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<!doctype html>

<title>Unclosed Constructs Are Valid</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<meta name="author" title="Tab Atkins-Bittner">

<link rel=help href="https://drafts.csswg.org/css-syntax/#rule-defs">

<!--

Tests that unclosed constructs are valid and match grammars,

because grammar-matching only sees the "block",

not the opening/closing characters themselves.

-->

<script>

function validSelector(str) {

try {

document.querySelector(str);

return true;

} catch(e) {

return false;

}

}

function shouldBeValid(str) {

test(()=>{

assert_true(validSelector(str));

}, `"${str}" is a valid selector`)

}

shouldBeValid("[foo]");

shouldBeValid("[foo");

shouldBeValid(":nth-child(1)");

shouldBeValid(":nth-child(1");

</script>