lucid-ui

<!doctype html> <html lang="en"> <head> <title>Code coverage report for StickySection/StickySection.tsx</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../prettify.css" /> <link rel="stylesheet" href="../base.css" /> <link rel="shortcut icon" type="image/x-icon" href="../favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="../index.html">All files</a> / <a href="index.html">StickySection</a> StickySection.tsx</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 45.71% Statements 16/35 </div> <div class='fl pad1y space-right2'> 34.38% Branches 11/32 </div> <div class='fl pad1y space-right2'> 33.33% Functions 2/6 </div> <div class='fl pad1y space-right2'> 45.71% Lines 16/35 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the 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    12x                                                                                     12x                                           4x           4x                             15x   15x   15x                                                                                                                                  </td><td class="text"><pre class="prettyprint lang-js">import React from 'react'; import PropTypes from 'react-peek/prop-types'; import _ from 'lodash'; import { lucidClassNames } from '../../util/style-helpers'; import { omitProps, StandardProps } from '../../util/component-types'; import { getAbsoluteBoundingClientRect } from '../../util/dom-helpers';   const cx = lucidClassNames.bind('&-StickySection'); const { node, number, object, string } = PropTypes;   interface IStickySectionProps extends StandardProps, React.DetailedHTMLProps< React.HTMLAttributes<HTMLDivElement>, HTMLDivElement > { /** Pixel value from the top of the document. When scrolled passed, the * sticky header is no longer sticky, and renders normally. */ lowerBound?: number;   /** Width of section when it sticks to the top edge of the screen. When * omitted, it defaults to the last width of the section. */ viewportWidth?: number;   /** Top offset threshold before sticking to the top. The sticky content will * display with this offset. */ topOffset?: number; }   interface IContainerRect extends ClientRect { scrollWidth: number; frameLeft: number; }   interface IStickySectionState { isAboveFold: boolean; containerRect: IContainerRect; }   class StickySection extends React.Component< IStickySectionProps, IStickySectionState, {} > { static displayName = 'StickySection';   static peek = { description: ` \`StickySection\` can be wrapped around any content to make it _stick_ to the top edge of the screen when a user scrolls beyond its initial location. `, categories: ['helpers'], };   static propTypes = { children: node` any valid React children `, className: string` Appended to the component-specific class names set on the root element. `, style: object` Styles that are passed through to the root container. `, lowerBound: number` Pixel value from the top of the document. When scrolled passed, the sticky header is no longer sticky, and renders normally. `, viewportWidth: number` Width of section when it sticks to the top edge of the screen. When omitted, it defaults to the last width of the section. `, topOffset: number` Top offset threshold before sticking to the top. The sticky content will display with this offset. `, };   private scrollContainer = React.createRef<HTMLDivElement>(); private stickySection = React.createRef<HTMLDivElement>(); private stickyFrame = React.createRef<HTMLDivElement>();   state = { isAboveFold: false, containerRect: { bottom: 0, height: 0, left: 0, right: 0, top: 0, width: 0, frameLeft: 0, scrollWidth: 0, }, };   handleScroll = (): void => { const { lowerBound, topOffset = 0 } = this.props;   const { isAboveFold, containerRect } = this.state;   const nextContainerRect = this.getContainerRect();   if (window.pageYOffset + topOffset >= nextContainerRect.top) { if (!isAboveFold) { this.setState({ isAboveFold: true, }); } } else { if (isAboveFold) { this.setState({ isAboveFold: false, }); } }   if (_.isNumber(lowerBound) && window.pageYOffset >= lowerBound) { this.setState({ isAboveFold: false, }); }   if ( containerRect.bottom !== nextContainerRect.bottom || containerRect.height !== nextContainerRect.height || containerRect.left !== nextContainerRect.left || containerRect.right !== nextContainerRect.right || containerRect.top !== nextContainerRect.top || containerRect.width !== nextContainerRect.width || containerRect.scrollWidth !== nextContainerRect.scrollWidth || containerRect.frameLeft !== nextContainerRect.frameLeft ) { this.setState({ containerRect: nextContainerRect, }); } };   getContainerRect = (): IContainerRect => { const containerRect = getAbsoluteBoundingClientRect( this.scrollContainer.current as HTMLElement ); const stickyRect = (this.stickySection .current as HTMLElement).getBoundingClientRect(); const frameRect = (this.stickyFrame .current as HTMLElement).getBoundingClientRect();   return { bottom: containerRect.top + stickyRect.height, height: stickyRect.height, left: containerRect.left, right: containerRect.left + stickyRect.width, top: containerRect.top, scrollWidth: (this.stickySection.current as HTMLElement).scrollWidth, width: containerRect.width, frameLeft: frameRect.left, }; };   componentDidMount(): void { setTimeout((): void => { this.setState({ containerRect: this.getContainerRect(), }); this.handleScroll(); }, 1); window.addEventListener('scroll', this.handleScroll, true); }   componentWillUnmount(): void { window.removeEventListener('scroll', this.handleScroll, true); }   render(): React.ReactNode { const { children, className, style, topOffset = 0, viewportWidth, ...passThroughs } = this.props;   const { isAboveFold, containerRect } = this.state;   return ( <div {...omitProps<IStickySectionProps>( passThroughs, undefined, Object.keys(StickySection.propTypes) )} className={cx('&', className)} style={{ ...(isAboveFold ? { height: containerRect.height, visibility: 'hidden', } : {}), ...style, }} ref={this.scrollContainer} > <div className={cx('&-sticky-frame')} ref={this.stickyFrame} style={{ ...(isAboveFold ? { visibility: 'visible', position: 'fixed', top: topOffset, width: _.isNumber(viewportWidth) ? viewportWidth : containerRect.width, height: containerRect.height, overflow: 'hidden', } : {}), ...style, }} > <div className={cx('&-sticky-section')} ref={this.stickySection} style={{ ...(isAboveFold ? { position: 'absolute', top: 0, left: containerRect.left - containerRect.frameLeft || 0, width: containerRect.scrollWidth, height: containerRect.height, } : { position: 'relative', }), ...style, }} > {children} </div> </div> </div> ); } }   export default StickySection;  </pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at Mon May 17 2021 22:28:18 GMT+0000 (Coordinated Universal Time) </div> </div> <script src="../prettify.js"></script> <script> window.onload = function () { prettyPrint(); }; </script> <script src="../sorter.js"></script> <script src="../block-navigation.js"></script> </body> </html>