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<!doctype html> <html class="no-js" lang=""> <head> <meta charset="utf-8"> <meta http-equiv="x-ua-compatible" content="ie=edge"> <title>carbon-components-angular documentation</title> <meta name="description" content=""> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="icon" type="image/x-icon" href="../images/favicon.ico"> <link rel="stylesheet" href="../styles/style.css"> <link rel="stylesheet" href="../styles/dark.css"> <style> footer.carbon { position: absolute; bottom: 0; width: 100%; z-index: 9999; } #root > div { /* * Subtracting the height of the footer to prevent * overlaying the footer ontop of content */ height: calc(100vh - 48px); } </style> </head> <body> <script> // Blocking script to avoid flickering dark mode // Dark mode toggle button var useDark = window.matchMedia('(prefers-color-scheme: dark)'); var darkModeState = useDark.matches; var $darkModeToggleSwitchers = document.querySelectorAll('.dark-mode-switch input'); var $darkModeToggles = document.querySelectorAll('.dark-mode-switch'); var darkModeStateLocal = localStorage.getItem('compodoc_darkmode-state'); function checkToggle(check) { for (var i = 0; i < $darkModeToggleSwitchers.length; i++) { $darkModeToggleSwitchers[i].checked = check; } } function toggleDarkMode(state) { if (window.localStorage) { localStorage.setItem('compodoc_darkmode-state', state); } checkToggle(state); const hasClass = document.body.classList.contains('dark'); if (state) { for (var i = 0; i < $darkModeToggles.length; i++) { $darkModeToggles[i].classList.add('dark'); } if (!hasClass) { document.body.classList.add('dark'); } } else { for (var i = 0; i < $darkModeToggles.length; i++) { $darkModeToggles[i].classList.remove('dark'); } if (hasClass) { document.body.classList.remove('dark'); } } } useDark.addEventListener('change', function (evt) { toggleDarkMode(evt.matches); }); if (darkModeStateLocal) { darkModeState = darkModeStateLocal === 'true'; } toggleDarkMode(darkModeState); </script> <div class="navbar navbar-default navbar-fixed-top d-md-none p-0"> <div class="d-flex"> <a href="../" class="navbar-brand">carbon-components-angular documentation</a> <button type="button" class="btn btn-default btn-menu ion-ios-menu" id="btn-menu"></button> </div> </div> <div class="xs-menu menu" id="mobile-menu"> <div id="book-search-input" role="search"><input type="text" placeholder="Type to search"></div> <compodoc-menu></compodoc-menu> </div> <div class="container-fluid main"> <div class="row main"> <div class="d-none d-md-block menu"> <compodoc-menu mode="normal"></compodoc-menu> </div> <!-- START CONTENT --> <div class="content directive"> <div class="content-data"> <ol class="breadcrumb"> <li class="breadcrumb-item">Directives</li> <li class="breadcrumb-item" >ScrollableList</li> </ol> <ul class="nav nav-tabs" role="tablist"> <li class="nav-item"> <a href="#info" class="nav-link" class="nav-link active" role="tab" id="info-tab" data-bs-toggle="tab" data-link="info">Info</a> </li> <li class="nav-item"> <a href="#source" class="nav-link" role="tab" id="source-tab" data-bs-toggle="tab" data-link="source">Source</a> </li> </ul> <div class="tab-content"> <div class="tab-pane fade active in" id="info"> <p class="comment"> <h3>File</h3> </p> <p class="comment"> <code>src/dropdown/scrollable-list.directive.ts</code> </p> <p class="comment"> <h3>Implements</h3> </p> <p class="comment"> <code>OnChanges</code> <code>AfterViewInit</code> </p> <section data-compodoc="block-metadata"> <h3>Metadata</h3> <table class="table table-sm table-hover metadata"> <tbody> <tr> <td class="col-md-3">Selector</td> <td class="col-md-9"><code>[cdsScrollableList], [ibmScrollableList]</code></td> </tr> <tr> <td class="col-md-3">exportAs</td> <td class="col-md-9"><code>scrollable-list</code></td> </tr> </tbody> </table> </section> <section data-compodoc="block-index"> <h3 id="index">Index</h3> <table class="table table-sm table-bordered index-table"> <tbody> <tr> <td class="col-md-4"> <h6><b>Properties</b></h6> </td> </tr> <tr> <td class="col-md-4"> <ul class="index-list"> <li> <span class="modifier">Protected</span> <a href="#canScrollDown" >canScrollDown</a> </li> <li> <span class="modifier">Protected</span> <a href="#canScrollUp" >canScrollUp</a> </li> <li> <span class="modifier">Protected</span> <a href="#hoverScrollInterval" >hoverScrollInterval</a> </li> <li> <span class="modifier">Protected</span> <a href="#lastTouch" >lastTouch</a> </li> <li> <span class="modifier">Protected</span> <a href="#list" >list</a> </li> </ul> </td> </tr> <tr> <td class="col-md-4"> <h6><b>Methods</b></h6> </td> </tr> <tr> <td class="col-md-4"> <ul class="index-list"> <li> <span class="modifier">Protected</span> <a href="#checkScrollArrows" >checkScrollArrows</a> </li> <li> <span class="modifier">Protected</span> <a href="#hoverScrollBy" >hoverScrollBy</a> </li> <li> <a href="#ngAfterViewInit" >ngAfterViewInit</a> </li> <li> <a href="#ngOnChanges" >ngOnChanges</a> </li> <li> <span class="modifier">Protected</span> <a href="#onHoverDown" >onHoverDown</a> </li> <li> <span class="modifier">Protected</span> <a href="#onHoverUp" >onHoverUp</a> </li> <li> <span class="modifier"></span> <span class="modifier">Protected</span> <a href="#onKeyDown" >onKeyDown</a> </li> <li> <span class="modifier"></span> <span class="modifier">Protected</span> <a href="#onTouchMove" >onTouchMove</a> </li> <li> <span class="modifier"></span> <span class="modifier">Protected</span> <a href="#onTouchStart" >onTouchStart</a> </li> <li> <span class="modifier"></span> <span class="modifier">Protected</span> <a href="#onWheel" >onWheel</a> </li> <li> <span class="modifier">Public</span> <a href="#updateScrollHeight" >updateScrollHeight</a> </li> </ul> </td> </tr> <tr> <td class="col-md-4"> <h6><b>Inputs</b></h6> </td> </tr> <tr> <td class="col-md-4"> <ul class="index-list"> <li> <a href="#nScrollableList" >nScrollableList</a> </li> <li> <a href="#scrollBy" >scrollBy</a> </li> <li> <a href="#scrollDownTarget" >scrollDownTarget</a> </li> <li> <a href="#scrollEnabled" >scrollEnabled</a> </li> <li> <a href="#scrollUpTarget" >scrollUpTarget</a> </li> </ul> </td> </tr> <tr> <td class="col-md-4"> <h6><b>HostListeners</b></h6> </td> </tr> <tr> <td class="col-md-4"> <ul class="index-list"> <li> <a href="#keydown" >keydown</a> </li> <li> <a href="#touchmove" >touchmove</a> </li> <li> <a href="#touchstart" >touchstart</a> </li> <li> <a href="#wheel" >wheel</a> </li> </ul> </td> </tr> </tbody> </table> </section> <section data-compodoc="block-constructor"> <h3 id="constructor">Constructor</h3> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <code>constructor(elementRef: ElementRef)</code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="44" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:44</a></div> </td> </tr> <tr> <td class="col-md-4"> <div> <b>Parameters :</b> <table class="params"> <thead> <tr> <td>Name</td> <td>Type</td> <td>Optional</td> </tr> </thead> <tbody> <tr> <td>elementRef</td> <td> <code>ElementRef</code> </td> <td> No </td> </tr> </tbody> </table> </div> </td> </tr> </tbody> </table> </section> <section data-compodoc="block-inputs"> <h3 id="inputs">Inputs</h3> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="nScrollableList"></a> <b>nScrollableList</b> </td> </tr> <tr> <td class="col-md-4"> <i>Type : </i> <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank" >string</a></code> </td> </tr> <tr> <td class="col-md-4"> <i>Default value : </i><code>null</code> </td> </tr> <tr> <td class="col-md-2" colspan="2"> <div class="io-line">Defined in <a href="" data-line="19" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:19</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"><p>Optional target list to scroll</p> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="scrollBy"></a> <b>scrollBy</b> </td> </tr> <tr> <td class="col-md-4"> <i>Type : </i> <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/number" target="_blank" >number</a></code> </td> </tr> <tr> <td class="col-md-4"> <i>Default value : </i><code>10</code> </td> </tr> <tr> <td class="col-md-2" colspan="2"> <div class="io-line">Defined in <a href="" data-line="36" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:36</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"><p>How many lines to scroll by each time <code>wheel</code> fires Defaults to 10 - based on testing this isn&#39;t too fast or slow on any platform</p> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="scrollDownTarget"></a> <b>scrollDownTarget</b> </td> </tr> <tr> <td class="col-md-4"> <i>Type : </i> <code>HTMLElement</code> </td> </tr> <tr> <td class="col-md-2" colspan="2"> <div class="io-line">Defined in <a href="" data-line="31" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:31</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"><p>Sets the target used for hover scrolling down</p> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="scrollEnabled"></a> <b>scrollEnabled</b> </td> </tr> <tr> <td class="col-md-4"> <i>Type : </i> <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/boolean" target="_blank" >boolean</a></code> </td> </tr> <tr> <td class="col-md-4"> <i>Default value : </i><code>true</code> </td> </tr> <tr> <td class="col-md-2" colspan="2"> <div class="io-line">Defined in <a href="" data-line="23" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:23</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"><p>Enables or disables scrolling for the whole directive</p> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="scrollUpTarget"></a> <b>scrollUpTarget</b> </td> </tr> <tr> <td class="col-md-4"> <i>Type : </i> <code>HTMLElement</code> </td> </tr> <tr> <td class="col-md-2" colspan="2"> <div class="io-line">Defined in <a href="" data-line="27" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:27</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"><p>Sets the target used for hover scrolling up</p> </div> </td> </tr> </tbody> </table> </section> <section data-compodoc="block-host-listener"> <h3>HostListeners</h3> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="keydown"></a> <span class="name"> <b> keydown </b> <a href="#keydown"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <i>Arguments : </i><code>'$event' </code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="182" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:182</a></div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="touchmove"></a> <span class="name"> <b> touchmove </b> <a href="#touchmove"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <i>Arguments : </i><code>'$event' </code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="148" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:148</a></div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="touchstart"></a> <span class="name"> <b> touchstart </b> <a href="#touchstart"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <i>Arguments : </i><code>'$event' </code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="141" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:141</a></div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="wheel"></a> <span class="name"> <b> wheel </b> <a href="#wheel"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <i>Arguments : </i><code>'$event' </code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="126" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:126</a></div> </td> </tr> </tbody> </table> </section> <section data-compodoc="block-methods"> <h3 id="methods"> Methods </h3> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="checkScrollArrows"></a> <span class="name"> <span class="modifier">Protected</span> <span ><b>checkScrollArrows</b></span> <a href="#checkScrollArrows"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <span class="modifier-icon icon ion-ios-reset"></span> <code>checkScrollArrows()</code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="96" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:96</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"> <b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="hoverScrollBy"></a> <span class="name"> <span class="modifier">Protected</span> <span ><b>hoverScrollBy</b></span> <a href="#hoverScrollBy"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <span class="modifier-icon icon ion-ios-reset"></span> <code>hoverScrollBy(hovering, amount)</code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="159" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:159</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"> <b>Parameters :</b> <table class="params"> <thead> <tr> <td>Name</td> <td>Optional</td> </tr> </thead> <tbody> <tr> <td>hovering</td> <td> No </td> </tr> <tr> <td>amount</td> <td> No </td> </tr> </tbody> </table> </div> <div class="io-description"> <b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code> </div> <div class="io-description"> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="ngAfterViewInit"></a> <span class="name"> <span ><b>ngAfterViewInit</b></span> <a href="#ngAfterViewInit"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <code>ngAfterViewInit()</code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="73" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:73</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"> <b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="ngOnChanges"></a> <span class="name"> <span ><b>ngOnChanges</b></span> <a href="#ngOnChanges"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <code>ngOnChanges(changes: SimpleChanges)</code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="48" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:48</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"> <b>Parameters :</b> <table class="params"> <thead> <tr> <td>Name</td> <td>Type</td> <td>Optional</td> </tr> </thead> <tbody> <tr> <td>changes</td> <td> <code>SimpleChanges</code> </td> <td> No </td> </tr> </tbody> </table> </div> <div class="io-description"> <b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code> </div> <div class="io-description"> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="onHoverDown"></a> <span class="name"> <span class="modifier">Protected</span> <span ><b>onHoverDown</b></span> <a href="#onHoverDown"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <span class="modifier-icon icon ion-ios-reset"></span> <code>onHoverDown(hovering)</code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="177" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:177</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"> <b>Parameters :</b> <table class="params"> <thead> <tr> <td>Name</td> <td>Optional</td> </tr> </thead> <tbody> <tr> <td>hovering</td> <td> No </td> </tr> </tbody> </table> </div> <div class="io-description"> <b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code> </div> <div class="io-description"> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="onHoverUp"></a> <span class="name"> <span class="modifier">Protected</span> <span ><b>onHoverUp</b></span> <a href="#onHoverUp"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <span class="modifier-icon icon ion-ios-reset"></span> <code>onHoverUp(hovering)</code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="170" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:170</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"> <b>Parameters :</b> <table class="params"> <thead> <tr> <td>Name</td> <td>Optional</td> </tr> </thead> <tbody> <tr> <td>hovering</td> <td> No </td> </tr> </tbody> </table> </div> <div class="io-description"> <b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code> </div> <div class="io-description"> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="onKeyDown"></a> <span class="name"> <span class="modifier"></span> <span class="modifier">Protected</span> <span ><b>onKeyDown</b></span> <a href="#onKeyDown"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <span class="modifier-icon icon ion-ios-reset"></span> <code>onKeyDown(event)</code> </td> </tr> <tr> <td class="col-md-4"> <b>Decorators : </b> <br /> <code>@HostListener(&#x27;keydown&#x27;, [&#x27;$event&#x27;])<br /></code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="182" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:182</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"> <b>Parameters :</b> <table class="params"> <thead> <tr> <td>Name</td> <td>Optional</td> </tr> </thead> <tbody> <tr> <td>event</td> <td> No </td> </tr> </tbody> </table> </div> <div class="io-description"> <b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code> </div> <div class="io-description"> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="onTouchMove"></a> <span class="name"> <span class="modifier"></span> <span class="modifier">Protected</span> <span ><b>onTouchMove</b></span> <a href="#onTouchMove"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <span class="modifier-icon icon ion-ios-reset"></span> <code>onTouchMove(event)</code> </td> </tr> <tr> <td class="col-md-4"> <b>Decorators : </b> <br /> <code>@HostListener(&#x27;touchmove&#x27;, [&#x27;$event&#x27;])<br /></code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="148" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:148</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"> <b>Parameters :</b> <table class="params"> <thead> <tr> <td>Name</td> <td>Optional</td> </tr> </thead> <tbody> <tr> <td>event</td> <td> No </td> </tr> </tbody> </table> </div> <div class="io-description"> <b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code> </div> <div class="io-description"> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="onTouchStart"></a> <span class="name"> <span class="modifier"></span> <span class="modifier">Protected</span> <span ><b>onTouchStart</b></span> <a href="#onTouchStart"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <span class="modifier-icon icon ion-ios-reset"></span> <code>onTouchStart(event)</code> </td> </tr> <tr> <td class="col-md-4"> <b>Decorators : </b> <br /> <code>@HostListener(&#x27;touchstart&#x27;, [&#x27;$event&#x27;])<br /></code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="141" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:141</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"> <b>Parameters :</b> <table class="params"> <thead> <tr> <td>Name</td> <td>Optional</td> </tr> </thead> <tbody> <tr> <td>event</td> <td> No </td> </tr> </tbody> </table> </div> <div class="io-description"> <b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code> </div> <div class="io-description"> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="onWheel"></a> <span class="name"> <span class="modifier"></span> <span class="modifier">Protected</span> <span ><b>onWheel</b></span> <a href="#onWheel"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <span class="modifier-icon icon ion-ios-reset"></span> <code>onWheel(event)</code> </td> </tr> <tr> <td class="col-md-4"> <b>Decorators : </b> <br /> <code>@HostListener(&#x27;wheel&#x27;, [&#x27;$event&#x27;])<br /></code> </td> </tr> <tr> <td class="col-md-4"> <div class="io-line">Defined in <a href="" data-line="126" class="link-to-prism">src/dropdown/scrollable-list.directive.ts:126</a></div> </td> </tr> <tr> <td class="col-md-4"> <div class="io-description"> <b>Parameters :</b> <table class="params"> <thead> <tr> <td>Name</td> <td>Optional</td> </tr> </thead> <tbody> <tr> <td>event</td> <td> No </td> </tr> </tbody> </table> </div> <div class="io-description"> <b>Returns : </b> <code><a href="https://www.typescriptlang.org/docs/handbook/basic-types.html" target="_blank" >void</a></code> </div> <div class="io-description"> </div> </td> </tr> </tbody> </table> <table class="table table-sm table-bordered"> <tbody> <tr> <td class="col-md-4"> <a name="updateScrollHeight"></a> <span class="name"> <span class="modifier">Public</span> <span ><b>updateScrollHeight</b></span> <a href="#updateScrollHeight"><span class="icon ion-ios-link"></span></a> </span> </td> </tr> <tr> <td class="col-md-4"> <span class="modifier-icon icon ion-ios-reset"></span> <code>updateScrollHeight()</code> </td> </tr> <tr> <td class="col-md-4"> <div class="i