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<!DOCTYPE html>
<meta charset="utf-8">
<title>Form's lexical scope is established only for form-associated elements</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/forms.html#form-associated-element">
<link rel="help" href="https://html.spec.whatwg.org/multipage/webappapis.html#getting-the-current-value-of-the-event-handler">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<form id="form">
  <input onclick="window.inputOnClickElements = elements;">
  <img onclick="window.imgOnClickElements = elements;" alt="img">
  <div onclick="window.divOnClickElements = elements;">div</div>
  <x-foo onclick="window.xFooOnClickElements = elements;">x-foo</x-foo>
</form>

<script>
"use strict";

window.elements = "global_elements";

test(() => {
  const input = form.querySelector("input");
  input.click();
  assert_equals(window.inputOnClickElements, form.elements);
}, "<input> has a form owner");

test(() => {
  const img = form.querySelector("img");
  img.click();
  assert_equals(window.imgOnClickElements, form.elements);
}, "<img> has a form owner");

test(() => {
  const div = form.querySelector("div");
  div.click();
  assert_equals(window.divOnClickElements, window.elements);
}, "<div> doesn't have a form owner");

test(() => {
  customElements.define("x-foo", class extends HTMLElement {
    static formAssociated = true;
  });

  const xFoo = form.querySelector("x-foo");
  xFoo.click();
  assert_equals(window.xFooOnClickElements, form.elements);
}, "form-associated <x-foo> has a form owner");
</script>