callback.html | Explore in Territory

<!DOCTYPE html>
<title>Custom Elements: Create an element when definition is non-null and synchronous flag not set</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="resources/custom-elements-helpers.js"></script>
<body>
<script>
'use strict';

(() => {
  // "Upgrade an element"
  // https://html.spec.whatwg.org/multipage/scripting.html#upgrades

  // 1. For each attribute in element's attribute list, in order, enqueue a
  // custom element callback reaction with element, callback name
  // "attributeChangedCallback", and an argument list containing attribute's
  // local name, null, attribute's value, and attribute's namespace.

  // 2. If element is currently in a shadow-including document, then enqueue a
  // custom element callback reaction with element, callback name
  // "connectedCallback", and an empty argument list.

  const constructor = 'constructor';
  const connected = 'connected';
  const disconnected = 'disconnected';
  const attributeChanged = 'attributeChanged';

  function define_logger(w, observedAttributes) {
    let logs = [];
    w.customElements.define('a-a', class extends w.HTMLElement {
      constructor() { super(); logs.push([constructor, this, arguments]); }
      connectedCallback() { logs.push([connected, this, arguments]); }
      disconnectedCallback() { logs.push([disconnected, this, arguments]); }
      static get observedAttributes() { return observedAttributes; }
      attributeChangedCallback() { logs.push([attributeChanged, this, arguments]); }
    });
    return logs;
  }

  function assert_log_is_type(logs, i, type, element, argv) {
    assert_equals(logs[i][0], type, `[${i}] should be ${type}`);
    assert_equals(logs[i][1], element, `this in ${type} should be the element`);
    if (argv) {
      assert_array_equals(logs[i][2], argv, `${type} should have arguments ${argv}`);
    } else {
      assert_equals(logs[i][2].length, 0, `${type} should have no arguments`);
    }
  }

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    document.body.appendChild(element);
    let logs = define_logger(w);
    assert_log_is_type(logs, 0, constructor, element);
    assert_log_is_type(logs, 1, connected, element);
    assert_equals(logs.length, 2);
  }, 'upgrade should enqueue connectedCallback');

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    element.setAttribute('x', '1');
    element.setAttribute('y', '2');
    element.setAttribute('z', '3');
    document.body.appendChild(element);
    let logs = define_logger(w, ['x', 'y']);
    assert_log_is_type(logs, 0, constructor, element);
    assert_log_is_type(logs, 1, attributeChanged, element, ['x', null, '1', null]);
    assert_log_is_type(logs, 2, attributeChanged, element, ['y', null, '2', null]);
    assert_log_is_type(logs, 3, connected, element);
    assert_equals(logs.length, 4);
  }, 'upgrade should enqueue attributeChangedCallback and connectedCallback');

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    element.setAttribute('x', '1');
    document.body.appendChild(element);
    let logs = define_logger(w, ['x', 'y']);

    logs.length = 0;
    element.setAttribute('z', '0');
    element.setAttribute('y', '2');
    element.setAttribute('x', '9');
    assert_log_is_type(logs, 0, attributeChanged, element, ['y', null, '2', null]);
    assert_log_is_type(logs, 1, attributeChanged, element, ['x', '1', '9', null]);
    assert_equals(logs.length, 2);
  }, 'setAttribute should enqueue attributeChangedCallback');

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    document.body.appendChild(element);
    let logs = define_logger(w, ['style']);

    logs.length = 0;
    element.style.color = 'red';
    assert_equals(logs.length, 1);
    assert_log_is_type(logs, 0, attributeChanged, element, ['style', null, 'color: red;', null]);

    element.style.color = 'green';
    assert_equals(logs.length, 2);
    assert_log_is_type(logs, 1, attributeChanged, element, ['style', 'color: red;', 'color: green;', null]);

    element.style.color = '';
    assert_equals(logs.length, 3);
    assert_log_is_type(logs, 2, attributeChanged, element, ['style', 'color: green;', "", null]);
  }, 'style.color should enqueue attributeChangedCallback for style attribute');

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    document.body.appendChild(element);
    let logs = define_logger(w, ['style']);

    logs.length = 0;
    element.style.cssText = 'color: red';
    assert_equals(logs.length, 1);
    assert_log_is_type(logs, 0, attributeChanged, element, ['style', null, 'color: red;', null]);
  }, 'style.cssText should enqueue attributeChangedCallback for style attribute');

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    document.body.appendChild(element);
    let logs = define_logger(w, ['style']);

    logs.length = 0;
    element.style.setProperty('color', 'red');
    assert_equals(logs.length, 1);
    assert_log_is_type(logs, 0, attributeChanged, element, ['style', null, 'color: red;', null]);

    element.style.removeProperty('color', 'red');
    assert_equals(logs.length, 2);
    assert_log_is_type(logs, 1, attributeChanged, element, ['style', 'color: red;', "", null]);
  }, 'style.setProperty/removeProperty should enqueue attributeChangedCallback for style attribute');

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    document.body.appendChild(element);
    let logs = define_logger(w, ['style']);

    logs.length = 0;
    element.style.cssFloat = 'left';
    assert_equals(logs.length, 1);
    assert_log_is_type(logs, 0, attributeChanged, element, ['style', null, 'float: left;', null]);
  }, 'style.cssFloat should enqueue attributeChangedCallback for style attribute');

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    document.body.appendChild(element);
    let logs = define_logger(w, ['lang']);

    logs.length = 0;
    element.lang = 'ja-jp';
    assert_equals(logs.length, 1);
    assert_log_is_type(logs, 0, attributeChanged, element, ['lang', null, 'ja-jp', null]);
  }, 'lang property setter should enqueue attributeChangedCallback for lang attribute');

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    element.setAttribute('x', '1');
    document.body.appendChild(element);
    let logs = define_logger(w, ['x']);

    logs.length = 0;
    element.removeAttribute('x');
    assert_log_is_type(logs, 0, attributeChanged, element, ['x', '1', null, null]);
    assert_equals(logs.length, 1);
  }, 'removeAttribute should enqueue attributeChangedCallback');

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    document.body.appendChild(element);
    let logs = define_logger(w, ['x']);
    logs.length = 0;

    element.setAttributeNS('urn:foo', 'x', '1');
    assert_log_is_type(logs, 0, attributeChanged, element, ['x', null, '1', 'urn:foo']);
    assert_equals(logs.length, 1);

    element.removeAttributeNS('urn:foo', 'x');
    assert_log_is_type(logs, 1, attributeChanged, element, ['x', '1', null, 'urn:foo']);
    assert_equals(logs.length, 2);
  }, 'attributeChangedCallback should transmit namespaces');

  test_with_window(w => {
    let document = w.document;
    let element = document.createElement('a-a');
    document.body.appendChild(element);
    let logs = define_logger(w);

    logs.length = 0;
    element.remove();
    assert_log_is_type(logs, 0, disconnected, element);
    assert_equals(logs.length, 1);
  }, 'remove should enqueue disconnectedCallback');
})();
</script>
</body>
chromium/third_party/blink/web_tests/custom-elements/spec/callback.html
