react-native-devtools-frontend/front_end/component_docs/elements_breadcrumbs/basic.html

<!--
  Copyright 2020 The Chromium Authors. All rights reserved.
  Use of this source code is governed by a BSD-style license that can be
  found in the LICENSE file.
-->
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width" />
    <title>Basic Breadcrumbs example</title>
    <style>
      #container {
        width: 80%;
        border: 1px solid black;
      }

      .fake-crumb-element {
        width: 300px;
        height: 20px;
        background: red;
        margin-bottom: 10px;
        padding: 2px;
        color: white;
        font-size: 20px;
        text-align: center;
      }
      .fake-crumb-element.highlight {
        background: blue;
      }
    </style>
  </head>
  <body>

    <div class="fake-crumb-element" data-fake-crumb-1>body</div>
    <div class="fake-crumb-element" data-fake-crumb-2>div#test-id</div>

    <div id="container">
    </div>

    <script type="module">
      import * as ComponentHelpers from '../../component_helpers/component_helpers.js';
      import {ElementsBreadcrumbs} from '../../elements/ElementsBreadcrumbs.js';

      ComponentHelpers.ComponentServerSetup.setup().then(() => renderComponent())

      const renderComponent = () => {
        let id = 0;
        const makeCrumb = (overrides = {}) => {
          const attributes = overrides.attributes || {};
          const newCrumb = {
            nodeType: Node.ELEMENT_NODE,
            id: id++,
            pseudoType: '',
            shadowRootType: '',
            nodeName: 'body',
            nodeNameNicelyCased: 'body',
            legacyDomNode: {},
            highlightNode: () => {},
            clearHighlight: () => {},
            getAttribute: x => attributes[x] || '',
            ...overrides,
          };
          return newCrumb;
        };

        const component = new ElementsBreadcrumbs();
        const bodyCrumb = makeCrumb({
          nodeType: Node.ELEMENT_NODE,
          id: 2,
          nodeName: 'body',
          nodeNameNicelyCased: 'body',
          highlightNode: () => {
            document.querySelector("[data-fake-crumb-1]").classList.add('highlight')
          },
          clearHighlight: () => {
            document.querySelector("[data-fake-crumb-1]").classList.remove('highlight')
          }
        });

        const divCrumb = makeCrumb({
          nodeType: Node.ELEMENT_NODE,
          id: 3,
          nodeName: 'div',
          nodeNameNicelyCased: 'div',
          attributes: {
            id: 'test-id',
          },
          highlightNode: () => {
            document.querySelector("[data-fake-crumb-2]").classList.add('highlight')
          },
          clearHighlight: () => {
            document.querySelector("[data-fake-crumb-2]").classList.remove('highlight')
          }
        });

        document.getElementById('container').appendChild(component);

        component.data = {
          crumbs: [divCrumb, bodyCrumb],
          selectedNode: bodyCrumb,
        };

        component.addEventListener('node-selected', node => {
          console.log('node selected', node);
        });
    }

    </script>
  </body>
</html>