<!DOCTYPE html>
<title>formDisabledCallback, and :disabled :enabled pseudo classes</title>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/semantics/forms/form-submission-0/resources/targetted-form.js"></script>
<script>
class MyControl extends HTMLElement {
  static get formAssociated() { return true; }

  constructor() {
    super();
    this.internals_ = this.attachInternals();
    this.internals_.setFormValue('my-control