react-spy-scroll

<!doctype html> <html lang="en"> <head> <title>Code coverage report for src/scroll-spy.js</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../prettify.css" /> <link rel="stylesheet" href="../base.css" /> <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">src/</a> scroll-spy.js </h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 89.61% Statements 138/154 </div> <div class='fl pad1y space-right2'> 78.79% Branches 52/66 </div> <div class='fl pad1y space-right2'> 78.38% Functions 29/37 </div> <div class='fl pad1y space-right2'> 51.52% Lines 17/33 </div> <div class='fl pad1y'> 48 statements, 14 functions, 29 branches Ignored      </div> </div> </div> <div class='status-line high'></div> <pre><table class="coverage"> <tr><td class="line-count quiet">1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79</td><td class="line-coverage quiet">      1× 1× 1×     1× 1× 1× 1×     1×       1× 1×                                                             1× 1×   1×                     1× 1×   1×                      </td><td class="text"><pre class="prettyprint lang-js">/** * The class responsible for keeping track of scrolling */ import ReactDOM from 'react-dom'; import { throttle } from './utils'; import Scroller from './scroller';   class ScrollSpy { constructor() { this._linksRegister = []; this._scrollPanelRegister = []; window.addEventListener('scroll', throttle(() => this._handleScroll({ target: document.body })) ); this._handleScroll({ target: document.body }); }   registerLink(component) { Eif (!this._linksRegister.includes(component)) { this._linksRegister.push(component); } }   registerScrollpanel(component) { if (!this._scrollPanelRegister.includes(component)) { const listener = throttle(this._handleScroll.bind(this)); component.addEventListener('scroll', listener); this._handleScroll({ target: component }); this._scrollPanelRegister.push({ component, listener }); } }   unregisterLink(component) { const index = this._linksRegister.indexOf(component); if (index >= 0) { this._linksRegister.splice(index, 1); } }   unregisterScrollpanel(component) { const index = this._scrollPanelRegister.findIndex((el) => el.component === component); if (index >= 0) { const el = this._scrollPanelRegister[index]; el.component.removeEventListener('scroll', el.listener);   this._scrollPanelRegister.splice(index, 1); } }   _handleScroll(e) { const scrolledIn = e.target; const scrollOffset = scrolledIn.scrollTop;   const elements = this._linksRegister .map((link) => ({ link, href: link.props.href })) .map(({ link, href }) => ({ link, href, panelComp: Scroller.getElementPanel(href), panel: ReactDOM.findDOMNode(Scroller.getElementPanel(href)) })) .filter(({ panel }) => scrolledIn.contains(panel)) .map(({ link, panelComp, panel }) => link._handleScroll(scrollOffset, scrolledIn, { panel, panelComp }));     const newActive = elements.find(({ isInside, hasActive }) => isInside && !hasActive); const oldActive = elements.find(({ isInside, hasActive }) => !isInside && hasActive);   Iif (newActive) { newActive.link.classList.add(newActive.activeClass);   if (oldActive) { oldActive.link.classList.remove(oldActive.activeClass); } } } }   export default new ScrollSpy();  </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="http://istanbul-js.org/" target="_blank">istanbul</a> at Sat Mar 26 2016 15:12:56 GMT+0100 (CET) </div> </div> <script src="../prettify.js"></script> <script> window.onload = function () { if (typeof prettyPrint === 'function') { prettyPrint(); } }; </script> <script src="../sorter.js"></script> </body> </html>