chrome-devtools-frontend/front_end/ui/components/docs/elements_breadcrumbs/scroll-to-active-element.ts

Chrome DevTools UI

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import * as Elements from '../../../../panels/elements/components/components.js';
import * as FrontendHelpers from '../../../../testing/EnvironmentHelpers.js';
import * as ComponentHelpers from '../../helpers/helpers.js';

import {makeCrumb} from './helpers.js';

await ComponentHelpers.ComponentServerSetup.setup();
await FrontendHelpers.initializeGlobalVars();

const component = new Elements.ElementsBreadcrumbs.ElementsBreadcrumbs();
const bodyCrumb = makeCrumb({
  nodeType: Node.ELEMENT_NODE,
  id: 1,
  nodeName: 'body',
  nodeNameNicelyCased: 'body',
  attributes: {class: 'body-class1 body-class2'},
});

const divCrumb = makeCrumb({
  nodeType: Node.ELEMENT_NODE,
  id: 2,
  nodeName: 'div',
  nodeNameNicelyCased: 'div',
  attributes: {
    id: 'test-id',
    class: 'wrapper-div',
  },
});

const spanCrumb = makeCrumb({
  nodeType: Node.ELEMENT_NODE,
  id: 3,
  nodeName: 'span',
  nodeNameNicelyCased: 'span',
  attributes: {
    id: 'my-span-has-a-long-id',
  },
});

const strongCrumb = makeCrumb({
  nodeType: Node.ELEMENT_NODE,
  id: 4,
  nodeName: 'strong',
  nodeNameNicelyCased: 'strong',
  attributes: {
    id: 'gotta-be-bold',
  },
});

const emCrumb = makeCrumb({
  nodeType: Node.ELEMENT_NODE,
  id: 5,
  nodeName: 'em',
  nodeNameNicelyCased: 'em',
  attributes: {id: 'my-em-has-a-long-id', class: 'and-a-very-long-class'},
});

const crumbs = [emCrumb, strongCrumb, spanCrumb, divCrumb, bodyCrumb];
const crumbsReversed = [...crumbs].reverse();

const selectedNodeParam = new URLSearchParams(location.search)?.get('selectedCrumbIndex');
const selectedNode = selectedNodeParam ? crumbsReversed[Number(selectedNodeParam)] : bodyCrumb;

component.data = {
  crumbs,
  selectedNode,
};
document.getElementById('container')?.appendChild(component);

const button = component.shadowRoot?.querySelector?.('button.overflow.right');
button?.dispatchEvent(new MouseEvent('click'));
// Each subsequent click is timed out to allow the smooth scroll to finish.
window.setTimeout(() => {
  button?.dispatchEvent(new MouseEvent('click'));
  window.setTimeout(() => {
    button?.dispatchEvent(new MouseEvent('click'));
  }, 200);
}, 200);

const btn = document.querySelector('button');
btn?.addEventListener('click', () => {
  component.data = {
    crumbs: [emCrumb, strongCrumb, spanCrumb, divCrumb, bodyCrumb],
    selectedNode: divCrumb,
  };
});