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luci/jsapi/LuCI.ui.ComboButton.html
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<!DOCTYPE html><html lang="en" style="font-size:16px"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><link rel="icon" href="favicon.png"><link type="text/css" rel="stylesheet" href="extra.css"><title>Class: ComboButton</title><!--[if lt IE 9]>
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<![endif]--><script src="scripts/third-party/hljs.js" defer="defer"></script><script src="scripts/third-party/hljs-line-num.js" defer="defer"></script><script src="scripts/third-party/popper.js" defer="defer"></script><script src="scripts/third-party/tippy.js" defer="defer"></script><script src="scripts/third-party/tocbot.min.js"></script><script>var baseURL="/",locationPathname="";baseURL=(locationPathname=document.location.pathname).substr(0,locationPathname.lastIndexOf("/")+1)</script><link rel="stylesheet" href="styles/clean-jsdoc-theme.min.css"><svg aria-hidden="true" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style="display:none"><defs><symbol id="copy-icon" viewbox="0 0 488.3 488.3"><g><path d="M314.25,85.4h-227c-21.3,0-38.6,17.3-38.6,38.6v325.7c0,21.3,17.3,38.6,38.6,38.6h227c21.3,0,38.6-17.3,38.6-38.6V124 C352.75,102.7,335.45,85.4,314.25,85.4z M325.75,449.6c0,6.4-5.2,11.6-11.6,11.6h-227c-6.4,0-11.6-5.2-11.6-11.6V124 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class="sidebar-section-children"><a href="LuCI.validation.ValidatorFactory.html">ValidatorFactory</a></div><div class="sidebar-section-children"><a href="LuCI.view.html">view</a></div><div class="sidebar-section-children"><a href="LuCI.xhr.html">xhr</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-externals"><div>Externals</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="external-String.html">String</a></div></div></div></div></div><div class="navbar-container" id="VuAckcnZhf"><nav class="navbar"><div class="navbar-left-items"><div class="github-home navbar-item"><a id="" href="https://github.com/openwrt/luci" target="">GitHub Project Page</a></div></div><div class="navbar-right-items"><div class="navbar-right-item"><button class="icon-button search-button" aria-label="open-search"><svg><use xlink:href="#search-icon"></use></svg></button></div><div class="navbar-right-item"><button class="icon-button theme-toggle" aria-label="toggle-theme"><svg><use class="theme-svg-use" xlink:href="#dark-theme-icon"></use></svg></button></div><div class="navbar-right-item"><button class="icon-button font-size" aria-label="change-font-size"><svg><use xlink:href="#font-size-icon"></use></svg></button></div></div><nav></nav></nav></div><div class="toc-container"><div class="toc-content"><span class="bold">On this page</span><div id="eed4d2a0bfd64539bb9df78095dec881"></div></div></div><div class="body-wrapper"><div class="main-content"><div class="main-wrapper"><section><header><h1 id="ComboButton-title" class="has-anchor"><span class="ancestors"><a href="LuCI.html">LuCI</a><a href="LuCI.ui.html">.ui</a>.</span> ComboButton</h1><div class="class-description"><p>The <code>ComboButton</code> class implements a button element which can be expanded into a dropdown to chose from a set of different action choices.</p><p>UI widget instances are usually not supposed to be created by view code directly, instead they're implicitly created by <code>LuCI.form</code> when instantiating CBI forms.</p><p>This class is automatically instantiated as part of <code>LuCI.ui</code>. To use it in views, use <code>'require ui'</code> and refer to <code>ui.ComboButton</code>. To import it in external JavaScript, use <code>L.require(&quot;ui&quot;).then(...)</code> and access the <code>ComboButton</code> property of the class instance value.</p></div></header><article><div class="container-overview"><h2 id="constructor" class="has-anchor">Constructor</h2><h3 class="name has-anchor" id="ComboButton"><span class="type-signature"></span>new ComboButton<span class="signature">(value<span class="signature-attributes">opt</span>, choices, options<span class="signature-attributes">opt</span>)</span></h3><div class="description"><p>Instantiate a combo button widget offering multiple action choices.</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th>Attributes</th><th>Default</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>value</code></td><td class="type"><span class="param-type">string</span> |<wbr> <span class="param-type">Array.&lt;string></span></td><td class="attributes">&lt;optional><br></td><td class="default">null</td><td class="description last"><p>The initial input value(s).</p></td></tr><tr><td class="name"><code>choices</code></td><td class="type"><span class="param-type">Object.&lt;string, *></span></td><td class="attributes"></td><td class="default"></td><td class="description last"><p>Object containing the selectable choices of the widget. The object keys serve as values for the different choices while the values are used as choice labels.</p></td></tr><tr><td class="name"><code>options</code></td><td class="type"><span class="param-type"><a href="LuCI.ui.ComboButton.html#.InitOptions">LuCI.<wbr>ui.<wbr>ComboButton.<wbr>InitOptions</a></span></td><td class="attributes">&lt;optional><br></td><td class="default"></td><td class="description last"><p>Object describing the widget specific options to initialize the button.</p></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line2195">line 2195</a></li></ul></dd></div></dl></div><h2 id="Extends" class="subsection-title has-anchor">Extends</h2><ul><li><a href="LuCI.ui.Dropdown.html">LuCI.ui.Dropdown</a></li></ul><h2 id="methods" class="subsection-title has-anchor">Methods</h2><h3 class="name has-anchor" id="addChoices"><span class="type-signature"></span>addChoices<span class="signature">(values, labels)</span></h3><div class="description"><p>Add new choices to the dropdown menu.</p><p>This function adds further choices to an existing dropdown menu, ignoring choice values which are already present.</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>values</code></td><td class="type"><span class="param-type">Array.&lt;string></span></td><td class="description last"><p>The choice values to add to the dropdown widget.</p></td></tr><tr><td class="name"><code>labels</code></td><td class="type"><span class="param-type">Object.&lt;string, *></span></td><td class="description last"><p>The choice label values to use when adding dropdown choices. If no label is found for a particular choice value, the value itself is used as label text. Choice labels may be any valid value accepted by <a href="LuCI.dom.html#content"><code>LuCI.dom#content</code></a>.</p></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.Dropdown.html#addChoices">LuCI.ui.Dropdown#addChoices</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line1804">line 1804</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="clearChoices"><span class="type-signature"></span>clearChoices<span class="signature">(reset_value<span class="signature-attributes">opt</span>)</span></h3><div class="description"><p>Remove all existing choices from the dropdown menu.</p><p>This function removes all preexisting dropdown choices from the widget, keeping only choices currently being selected unless <code>reset_values</code> is given, in which case all choices and deselected and removed.</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th>Attributes</th><th>Default</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>reset_value</code></td><td class="type"><span class="param-type">boolean</span></td><td class="attributes">&lt;optional><br></td><td class="default">false</td><td class="description last"><p>If set to <code>true</code>, deselect and remove selected choices as well instead of keeping them.</p></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.Dropdown.html#clearChoices">LuCI.ui.Dropdown#clearChoices</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line1769">line 1769</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="closeAllDropdowns"><span class="type-signature"></span>closeAllDropdowns<span class="signature">()</span></h3><div class="description"><p>Close all open dropdown widgets in the current document.</p></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.Dropdown.html#closeAllDropdowns">LuCI.ui.Dropdown#closeAllDropdowns</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line1837">line 1837</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="getValidationError"><span class="type-signature"></span>getValidationError<span class="signature">()</span><span class="type-signature"> &rarr; {string}</span></h3><div class="description"><p>Returns the current validation error</p></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.AbstractElement.html#getValidationError">LuCI.ui.AbstractElement#getValidationError</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line169">line 169</a></li></ul></dd></div></dl><div class="method-member-container mt-20"><strong>Returns:</strong><div class="param-desc"><p>The validation error at this time</p></div><dl class="param-type"><dt>Type:&nbsp;</dt><dd><span class="param-type">string</span></dd></dl></div><h3 class="name has-anchor" id="isChanged"><span class="type-signature"></span>isChanged<span class="signature">()</span><span class="type-signature"> &rarr; {boolean}</span></h3><div class="description"><p>Check whether the input value was altered by the user.</p></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.AbstractElement.html#isChanged">LuCI.ui.AbstractElement#isChanged</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line144">line 144</a></li></ul></dd></div></dl><div class="method-member-container mt-20"><strong>Returns:</strong><div class="param-desc"><p>Returns <code>true</code> if the input value has been altered by the user or <code>false</code> if it is unchanged. Note that if the user modifies the initial value and changes it back to the original state, it is still reported as changed.</p></div><dl class="param-type"><dt>Type:&nbsp;</dt><dd><span class="param-type">boolean</span></dd></dl></div><h3 class="name has-anchor" id="isValid"><span class="type-signature"></span>isValid<span class="signature">()</span><span class="type-signature"> &rarr; {boolean}</span></h3><div class="description"><p>Check whether the current input value is valid.</p></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.AbstractElement.html#isValid">LuCI.ui.AbstractElement#isValid</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line157">line 157</a></li></ul></dd></div></dl><div class="method-member-container mt-20"><strong>Returns:</strong><div class="param-desc"><p>Returns <code>true</code> if the current input value is valid or <code>false</code> if it does not meet the validation constraints.</p></div><dl class="param-type"><dt>Type:&nbsp;</dt><dd><span class="param-type">boolean</span></dd></dl></div><h3 class="name has-anchor" id="registerEvents"><span class="type-signature"></span>registerEvents<span class="signature">(targetNode, synevent, events)</span></h3><div class="description"><p>Dispatch a custom (synthetic) event in response to received events.</p><p>Sets up event handlers on the given target DOM node for the given event names that dispatch a custom event of the given type to the widget root DOM node.</p><p>The primary purpose of this function is to set up a series of custom uniform standard events such as <code>widget-update</code>, <code>validation-success</code>, <code>validation-failure</code> etc. which are triggered by various different widget specific native DOM events.</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>targetNode</code></td><td class="type"><span class="param-type">Node</span></td><td class="description last"><p>Specifies the DOM node on which the native event listeners should be registered.</p></td></tr><tr><td class="name"><code>synevent</code></td><td class="type"><span class="param-type">string</span></td><td class="description last"><p>The name of the custom event to dispatch to the widget root DOM node.</p></td></tr><tr><td class="name"><code>events</code></td><td class="type"><span class="param-type">Array.&lt;string></span></td><td class="description last"><p>The native DOM events for which event handlers should be registered.</p></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.AbstractElement.html#registerEvents">LuCI.ui.AbstractElement#registerEvents</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line219">line 219</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="setChangeEvents"><span class="type-signature"></span>setChangeEvents<span class="signature">(targetNode, &hellip;events)</span></h3><div class="description"><p>Set up listeners for native DOM events that may change the widget value.</p><p>Sets up event handlers on the given target DOM node for the given event names which may cause the input value to change completely, such as <code>change</code> events in a select menu. In contrast to update events, such change events will not trigger input value validation but they may cause field dependencies to get re-evaluated and will mark the input widget as dirty.</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th>Attributes</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>targetNode</code></td><td class="type"><span class="param-type">Node</span></td><td class="attributes"></td><td class="description last"><p>Specifies the DOM node on which the event listeners should be registered.</p></td></tr><tr><td class="name"><code>events</code></td><td class="type"><span class="param-type">string</span></td><td class="attributes">&lt;repeatable><br></td><td class="description last"><p>The DOM events for which event handlers should be registered.</p></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.AbstractElement.html#setChangeEvents">LuCI.ui.AbstractElement#setChangeEvents</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line288">line 288</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="setPlaceholder"><span class="type-signature"></span>setPlaceholder<span class="signature">(value)</span></h3><div class="description"><p>Set the current placeholder value of the input widget.</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>value</code></td><td class="type"><span class="param-type">string</span> |<wbr> <span class="param-type">Array.&lt;string></span> |<wbr> <span class="param-type">null</span></td><td class="description last"><p>The placeholder to set for the input element. Only applicable to text inputs, not to radio buttons, selects or similar.</p></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.AbstractElement.html#setPlaceholder">LuCI.ui.AbstractElement#setPlaceholder</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line116">line 116</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="setUpdateEvents"><span class="type-signature"></span>setUpdateEvents<span class="signature">(targetNode, &hellip;events)</span></h3><div class="description"><p>Set up listeners for native DOM events that may update the widget value.</p><p>Sets up event handlers on the given target DOM node for the given event names which may cause the input value to update, such as <code>keyup</code> or <code>onclick</code> events. In contrast to change events, such update events will trigger input value validation.</p></div><div class="method-member-container flex flex-col w-100 overflow-auto mt-20"><strong>Parameters:</strong><table class="params"><thead><tr><th>Name</th><th>Type</th><th>Attributes</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>targetNode</code></td><td class="type"><span class="param-type">Node</span></td><td class="attributes"></td><td class="description last"><p>Specifies the DOM node on which the event listeners should be registered.</p></td></tr><tr><td class="name"><code>events</code></td><td class="type"><span class="param-type">string</span></td><td class="attributes">&lt;repeatable><br></td><td class="description last"><p>The DOM events for which event handlers should be registered.</p></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.AbstractElement.html#setUpdateEvents">LuCI.ui.AbstractElement#setUpdateEvents</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line244">line 244</a></li></ul></dd></div></dl><h3 class="name has-anchor" id="triggerValidation"><span class="type-signature"></span>triggerValidation<span class="signature">()</span><span class="type-signature"> &rarr; {boolean}</span></h3><div class="description"><p>Force validation of the current input value.</p><p>Usually input validation is automatically triggered by various DOM events bound to the input widget. In some cases it is required though to manually trigger validation runs, e.g. when programmatically altering values.</p></div><dl class="details"><div class="details-item-container"><dt class="inherited-from bold">Inherited From</dt><dd class="inherited-from"><ul><li><a href="LuCI.ui.AbstractElement.html#triggerValidation">LuCI.ui.AbstractElement#triggerValidation</a></li></ul></dd></div><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line184">line 184</a></li></ul></dd></div></dl><div class="method-member-container mt-20"><strong>Returns:</strong><dl class="param-type"><dt>Type:&nbsp;</dt><dd><span class="param-type">boolean</span></dd></dl></div><h2 id="type-definitions" class="subsection-title has-anchor">Type Definitions</h2><h3 class="name has-anchor" id=".InitOptions">InitOptions</h3><div class="description"><p>ComboButtons support the same properties as <a href="LuCI.ui.Dropdown.html#.InitOptions"><code>Dropdown.InitOptions</code></a> but enforce specific values for some properties and add additional button specific properties.</p></div><div class="member-item-container flex"><strong>Type:</strong><ul><li><span class="param-type"><a href="LuCI.ui.Dropdown.html#.InitOptions">LuCI.<wbr>ui.<wbr>Dropdown.<wbr>InitOptions</a></span></li></ul></div><b class="subsection-title">Properties</b><div class="allow-overflow"><table class="props"><thead><tr><th>Name</th><th>Type</th><th>Attributes</th><th>Default</th><th class="last">Description</th></tr></thead><tbody><tr><td class="name"><code>multiple</code></td><td class="type"><span class="param-type">boolean</span></td><td class="attributes">&lt;optional><br></td><td class="default">false</td><td class="description last"><p>Since ComboButtons never allow selecting multiple actions, this property is forcibly set to <code>false</code>.</p></td></tr><tr><td class="name"><code>create</code></td><td class="type"><span class="param-type">boolean</span></td><td class="attributes">&lt;optional><br></td><td class="default">false</td><td class="description last"><p>Since ComboButtons never allow creating custom choices, this property is forcibly set to <code>false</code>.</p></td></tr><tr><td class="name"><code>optional</code></td><td class="type"><span class="param-type">boolean</span></td><td class="attributes">&lt;optional><br></td><td class="default">false</td><td class="description last"><p>Since ComboButtons must always select one action, this property is forcibly set to <code>false</code>.</p></td></tr><tr><td class="name"><code>classes</code></td><td class="type"><span class="param-type">Object.&lt;string, string></span></td><td class="attributes">&lt;optional><br></td><td class="default"></td><td class="description last"><p>Specifies a mapping of choice values to CSS class names. If an action choice is selected by the user and if a corresponding entry exists in the <code>classes</code> object, the class names corresponding to the selected value are set on the button element.</p><p>This is useful to apply different button styles, such as colors, to the combined button depending on the selected action.</p></td></tr><tr><td class="name"><code>click</code></td><td class="type"><span class="param-type">function</span></td><td class="attributes">&lt;optional><br></td><td class="default"></td><td class="description last"><p>Specifies a handler function to invoke when the user clicks the button. This function will be called with the button DOM node as <code>this</code> context and receive the DOM click event as first as well as the selected action choice value as second argument.</p></td></tr></tbody></table></div><dl class="details"><div class="details-item-container"><dt class="tag-source bold">Source</dt><dd class="tag-source"><ul><li><a href="ui.js.html">ui.js</a>, <a href="ui.js.html#line2228">line 2228</a></li></ul></dd></div></dl></article></section></div></div></div><div class="search-container" id="PkfLWpAbet" style="display:none"><div class="wrapper" id="iCxFxjkHbP"><button class="icon-button search-close-button" id="VjLlGakifb" aria-label="close search"><svg><use xlink:href="#close-icon"></use></svg></button><div class="search-box-c"><svg><use xlink:href="#search-icon"></use></svg> <input type="text" id="vpcKVYIppa" class="search-input" placeholder="Search..." autofocus></div><div class="search-result-c" id="fWwVHRuDuN"><span class="search-result-c-text">Type 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