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content / test / data / mhtml / custom_element_defined.html [blame]

<body>

Below is a custom element.
<test-element>

</test-element>

<undefined-test-element>
Hidden because undefined-test-element is not defined.
</undefined-test-element>

<b>Hidden with adopted stylesheet on document</b>

<script>
  class TestElement extends HTMLElement {
    constructor() {
      super();

      const testContents = document.getElementById('test-contents');
      const shadowRoot = this.attachShadow({mode: 'open'});

      const sheet = new CSSStyleSheet();
      sheet.replaceSync("a { display: none; }");
      shadowRoot.adoptedStyleSheets = [sheet];

      shadowRoot.innerHTML = `
<div>
    Inside Custom Element
    <a>Hidden with adopted stylesheet on shadowRoot</a>
    <i>Hidden with stylesheet on shadowRoot</i>
</div>
<style>
    /*This will be overridden by the adopted stylesheet.*/
    a { display: block; }
    i { display: none; }
</style>
`;
    }
  }
  customElements.define('test-element', TestElement);


  const sheet = new CSSStyleSheet();
  sheet.replaceSync("b { display: none; }");
  document.adoptedStyleSheets = [sheet];
</script>
</body>

<style>
    /** TODO(crbug.com/363289333): MHTML should retain status of defined
        elements, but it currently does not. Uncomment this when fixed.
    test-element:not(:defined) {
        display: none;
    }
    */
    undefined-test-element:not(:defined) {
        display: none;
    }
    /*This will be overridden by the adopted stylesheet.*/
    b { display: block; }
</style>