form-reset-callback.html

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This WPT test may be referenced by the following Test IDs:
- /custom-elements/form-associated/form-reset-callback.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<body>

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

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

<script>

class MyControl extends HTMLElement {

  static get formAssociated() { return true; }

  constructor() {

    super();

    this.resetCalled_ = false;

  formResetCallback() {

    this.resetCalled_ = true;

  get resetCalled() { return this.resetCalled_; }

customElements.define('my-control', MyControl);

test(() => {

  document.body.insertAdjacentHTML('beforeend',

      '<form><my-control></my-control></form>');

  let form = document.body.lastChild;

  let custom = form.firstChild;

  form.reset();

  assert_true(custom.resetCalled);

}, 'form.reset() should trigger formResetCallback');

test(() => {

  document.body.insertAdjacentHTML('beforeend',

      '<form><my-control></my-control><output>default</output></form>');

  let form = document.body.lastChild;

  let custom = form.firstChild;

  let output = form.lastChild;

  output.value = 'updated';

  output.addEventListener('DOMSubtreeModified', () => {

    assert_false(custom.resetCalled, 'formResetCallback should not be ' +

                 'called before built-in control\'s reset');

});

  form.reset();

  assert_true(custom.resetCalled);

}, 'form.reset(): formResetCallback is called after reset of the last ' +

   'built-in form control and before the next statement.');

promise_test(() => {

  document.body.insertAdjacentHTML('beforeend',

      '<form><my-control></my-control><input type=reset></form>');

  let form = document.body.lastChild;

  let custom = form.firstChild;

  let resetButton = form.lastChild;

  assert_false(custom.resetCalled);

  resetButton.click();

  assert_false(custom.resetCalled);

  return Promise.resolve().then(() => assert_true(custom.resetCalled));

}, 'Clicking a reset button invokes formResetCallback in a microtask');

</script>

</body>