input-pattern-dynamic-value.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/forms/constraints/input-pattern-dynamic-value.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Pattern dynamic value attribute change</title>

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

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

<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1636495">

<input pattern="a" value="a">

<script>

test(function() {

  let i = document.querySelector("input");

  assert_false(i.matches(":invalid"));

  i.pattern = "b";

  assert_true(i.matches(":invalid"));

  i.pattern = "(";

  assert_false(i.matches(":invalid"));

}, "input validation is updated after pattern attribute change");

</script>