compile-event-handler-lexical-scopes-form-owner.html

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This WPT test may be referenced by the following Test IDs:
- /html/webappapis/scripting/events/compile-event-handler-lexical-scopes-form-owner.html - WPT Dashboard Interop Dashboard

<!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>