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Test Info:

<!doctype html>
<meta charset="utf-8">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<input value="ltr" dir="auto">
<script>
test(function() {
let input = document.querySelector("input");
assert_true(input.matches(":dir(ltr)"), "Input with ltr value should match dir(ltr)");
input.textContent = "ﷺ";
assert_true(input.matches(":dir(ltr)"), "Should still match dir(ltr) after text change");
input.value = "ltr2";
assert_true(input.matches(":dir(ltr)"), "Should still match dir(ltr) after value change");
input.value = "ﷺ";
assert_true(input.matches(":dir(rtl)"), "Should match dir(rtl) after value change");
input.textContent = "ltr";
assert_true(input.matches(":dir(rtl)"), "Should match dir(rtl) after text change");
}, ":dir on <input> isn't altered by text children")
</script>