@aidinabedi/playcanvas

<!doctype html> <html lang="en"> <head> <title>pc.Tags | PlayCanvas API Reference</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link rel="icon" type="image/png" href="images/playcanvas-favicon.png"> <link href="styles/styles.css" rel="stylesheet"> <link href="styles/playcanvas-theme.css" rel="stylesheet"> <script src="scripts/interface.js"></script> <script src="scripts/highlight.min.js"></script> <script>hljs.initHighlightingOnLoad();</script> </head> <body> <header> <nav class="header-width"> <a href="/" class="header-title"><img src="images/playcanvas-manual.png"></a> <ul class="header-menu"> <li class="user-manual"><a href="https://developer.playcanvas.com/en/user-manual/">User Manual</a></li> <li class="tutorials"><a href="https://developer.playcanvas.com/en/tutorials">Tutorials</a></li> <li class="forum"><a href="https://forum.playcanvas.com/" target="_blank">Forum</a></li> <li class="api active"><a href="/api/">API Reference</a></li> </ul> </nav> <div class="header-content header-page header-width"> <h1><span class="font-icon"></span>API Reference</h1> <input id="search" class="search" type="text" placeholder="Search"></input> </div> </header> <div class="container content-width"> <nav class="sidebar"> <div class="sidebarFilter"> <input id="filter-input" type="text" placeholder="Filter"> </div> <ul> <li id="nav-pc"><a href="pc.html">pc</a></li> <li id="nav-pc.callbacks"><a href="pc.callbacks.html">pc.callbacks</a></li> <li id="nav-pc.guid"><a href="pc.guid.html">pc.guid</a></li> <li id="nav-pc.math"><a href="pc.math.html">pc.math</a></li> <li id="nav-pc.path"><a href="pc.path.html">pc.path</a></li> <li id="nav-pc.platform"><a href="pc.platform.html">pc.platform</a></li> <li id="nav-pc.script"><a href="pc.script.html">pc.script</a></li> <li id="nav-pc.string"><a href="pc.string.html">pc.string</a></li> <li id="nav-pc.Animation"><a href="pc.Animation.html">Animation</a></li> <li id="nav-pc.AnimationComponent"><a 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id="nav-pc.SoundInstance"><a href="pc.SoundInstance.html">SoundInstance</a></li> <li id="nav-pc.SoundInstance3d"><a href="pc.SoundInstance3d.html">SoundInstance3d</a></li> <li id="nav-pc.SoundManager"><a href="pc.SoundManager.html">SoundManager</a></li> <li id="nav-pc.SoundSlot"><a href="pc.SoundSlot.html">SoundSlot</a></li> <li id="nav-pc.Sprite"><a href="pc.Sprite.html">Sprite</a></li> <li id="nav-pc.SpriteAnimationClip"><a href="pc.SpriteAnimationClip.html">SpriteAnimationClip</a></li> <li id="nav-pc.SpriteComponent"><a href="pc.SpriteComponent.html">SpriteComponent</a></li> <li id="nav-pc.SpriteComponentSystem"><a href="pc.SpriteComponentSystem.html">SpriteComponentSystem</a></li> <li id="nav-pc.SpriteHandler"><a href="pc.SpriteHandler.html">SpriteHandler</a></li> <li id="nav-pc.StandardMaterial"><a href="pc.StandardMaterial.html">StandardMaterial</a></li> <li id="nav-pc.StencilParameters"><a href="pc.StencilParameters.html">StencilParameters</a></li> <li id="nav-pc.Tags"><a href="pc.Tags.html">Tags</a></li> <li id="nav-pc.Texture"><a href="pc.Texture.html">Texture</a></li> <li id="nav-pc.TextureAtlas"><a href="pc.TextureAtlas.html">TextureAtlas</a></li> <li id="nav-pc.TextureAtlasHandler"><a href="pc.TextureAtlasHandler.html">TextureAtlasHandler</a></li> <li id="nav-pc.TextureHandler"><a href="pc.TextureHandler.html">TextureHandler</a></li> <li id="nav-pc.Touch"><a href="pc.Touch.html">Touch</a></li> <li id="nav-pc.TouchDevice"><a href="pc.TouchDevice.html">TouchDevice</a></li> <li id="nav-pc.TouchEvent"><a href="pc.TouchEvent.html">TouchEvent</a></li> <li id="nav-pc.TransformFeedback"><a href="pc.TransformFeedback.html">TransformFeedback</a></li> <li id="nav-pc.Vec2"><a href="pc.Vec2.html">Vec2</a></li> <li id="nav-pc.Vec3"><a href="pc.Vec3.html">Vec3</a></li> <li id="nav-pc.Vec4"><a href="pc.Vec4.html">Vec4</a></li> <li id="nav-pc.VertexAttributeDescription"><a href="pc.VertexAttributeDescription.html">VertexAttributeDescription</a></li> <li id="nav-pc.VertexAttributeElement"><a href="pc.VertexAttributeElement.html">VertexAttributeElement</a></li> <li id="nav-pc.VertexBuffer"><a href="pc.VertexBuffer.html">VertexBuffer</a></li> <li id="nav-pc.VertexFormat"><a href="pc.VertexFormat.html">VertexFormat</a></li> <li id="nav-pc.VertexIterator"><a href="pc.VertexIterator.html">VertexIterator</a></li> <li id="nav-pc.VertexIteratorAccessor"><a href="pc.VertexIteratorAccessor.html">VertexIteratorAccessor</a></li> <li id="nav-pc.XrInput"><a href="pc.XrInput.html">XrInput</a></li> <li id="nav-pc.XrInputSource"><a href="pc.XrInputSource.html">XrInputSource</a></li> <li id="nav-pc.XrManager"><a href="pc.XrManager.html">XrManager</a></li> </ul> </nav> <div class='sidebarToggle'><span></span>Class List</div> <main class="cls"> <h1>pc.Tags</h1> <p class="extends">Extends: <a href="pc.EventHandler.html">pc.EventHandler</a></p> <p><p>Set of tag names.</p></p>  <h1>Summary</h1>     <h3>Properties</h3> <table class="properties"> <tr> <td><a href="#size">size</a></td><td><p>Number of tags in set.<span class='readonly'>[read only]</span></td> </tr> </table>  <h3>Methods</h3> <table class="properties"> <tr> <td><a href="#add">add</a></td><td><p>Add a tag, duplicates are ignored.</td> </tr> <tr> <td><a href="#clear">clear</a></td><td><p>Remove all tags.</td> </tr> <tr> <td><a href="#has">has</a></td><td><p>Check if tags satisfy filters.</td> </tr> <tr> <td><a href="#list">list</a></td><td><p>Returns immutable array of tags.</td> </tr> <tr> <td><a href="#remove">remove</a></td><td><p>Remove tag.</td> </tr> </table>  <h3>Events</h3> <table class="properties"> <tr> <td><a href="#event:add">add</a></td><td></td> </tr> <tr> <td><a href="#event:change">change</a></td><td><p>Fires when tags been added / removed.</td> </tr> <tr> <td><a href="#event:remove">remove</a></td><td></td> </tr> </table> <h2>Inherited</h2>    <h3>Methods</h3> <table class="properties"> <tr> <td><a href="#fire">fire</a></td><td><p>Fire an event, all additional arguments are passed on to the event listener.</td> </tr> <tr> <td><a href="#hasEvent">hasEvent</a></td><td><p>Test if there are any handlers bound to an event name.</td> </tr> <tr> <td><a href="#off">off</a></td><td><p>Detach an event handler from an event.</td> </tr> <tr> <td><a href="#on">on</a></td><td><p>Attach an event handler to an event.</td> </tr> <tr> <td><a href="#once">once</a></td><td><p>Attach an event handler to an event.</td> </tr> </table>  <h1>Details</h1>    <h2>Constructor</h2>  <div id="Tags"> <h3 class="methodname">Tags([parent]) <a class="font-icon" href="#Tags"></a></h3> <p><p>Create an instance of a Tags.</p></p> <h4>Parameters</h4> <table> <tr> <td>parent</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></td><td><p>Parent object who tags belong to. Note: Tags are used as addition of <code>pc.Entity</code> and <code>pc.Asset</code> as <code>tags</code> field.</p></td> </tr> </table> </div>  <h2>Properties</h2> <div id="size"> <span class="property"><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number">number</a></span><span class="property">size <a class="font-icon" href="#size"></a></span> <p><p>Number of tags in set.</p><span class='readonly'>[read only]</span></p> </div>  <h2>Methods</h2> <div id="add"> <h3 class="methodname">add(name) <a class="font-icon" href="#add"></a></h3> <p><p>Add a tag, duplicates are ignored. Can be array or comma separated arguments for multiple tags.</p></p> <pre><code class="javascript">tags.add('level-1');</code></pre> <pre><code class="javascript">tags.add('ui', 'settings');</code></pre> <pre><code class="javascript">tags.add(['level-2', 'mob']);</code></pre> <h4>Parameters</h4> <table> <tr> <td>name</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></td><td><p>Name of a tag, or array of tags.</p></td> </tr> </table> <h4>Returns</h4> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean">boolean</a> <p>True if any tag were added.</p> </div> <div id="clear"> <h3 class="methodname">clear() <a class="font-icon" href="#clear"></a></h3> <p><p>Remove all tags.</p></p> <pre><code class="javascript">tags.clear();</code></pre> </div> <div id="has"> <h3 class="methodname">has(query) <a class="font-icon" href="#has"></a></h3> <p><p>Check if tags satisfy filters. Filters can be provided by simple name of tag, as well as by array of tags. When an array is provided it will check if tags contain each tag within the array. If any of comma separated argument is satisfied, then it will return true. Any number of combinations are valid, and order is irrelevant.</p></p> <pre><code class="javascript">tags.has('player'); // player</code></pre> <pre><code class="javascript">tags.has('mob', 'player'); // player OR mob</code></pre> <pre><code class="javascript">tags.has(['level-1', 'mob']); // monster AND level-1</code></pre> <pre><code class="javascript">tags.has(['ui', 'settings'], ['ui', 'levels']); // (ui AND settings) OR (ui AND levels)</code></pre> <h4>Parameters</h4> <table> <tr> <td>query</td><td><a href="#">*</a></td><td><p>Name of a tag or array of tags.</p></td> </tr> </table> <h4>Returns</h4> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean">boolean</a> <p>True if filters are satisfied.</p> </div> <div id="list"> <h3 class="methodname">list() <a class="font-icon" href="#list"></a></h3> <p><p>Returns immutable array of tags.</p></p> <h4>Returns</h4> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String">string[]</a> <p>Copy of tags array.</p> </div> <div id="remove"> <h3 class="methodname">remove(name) <a class="font-icon" href="#remove"></a></h3> <p><p>Remove tag.</p></p> <pre><code class="javascript">tags.remove('level-1');</code></pre> <pre><code class="javascript">tags.remove('ui', 'settings');</code></pre> <pre><code class="javascript">tags.remove(['level-2', 'mob']);</code></pre> <h4>Parameters</h4> <table> <tr> <td>name</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></td><td><p>Name of a tag or array of tags.</p></td> </tr> </table> <h4>Returns</h4> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean">boolean</a> <p>True if any tag were removed.</p> </div>  <h2>Events</h2> <div id="event:add"> <h3 class="methodname">add <a class="font-icon" href="#event:add"></a></h3> <p></p> <h4>Parameters</h4> <table> <tr> <td>tag</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></td><td><p>Name of a tag added to a set.</p></td> </tr> <tr> <td>parent</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></td><td><p>Parent object who tags belong to.</p></td> </tr> </table> </div> <div id="event:change"> <h3 class="methodname">change <a class="font-icon" href="#event:change"></a></h3> <p><p>Fires when tags been added / removed. It will fire once on bulk changes, while <code>add</code>/<code>remove</code> will fire on each tag operation.</p></p> <h4>Parameters</h4> <table> <tr> <td>parent</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></td><td><p>Parent object who tags belong to.</p></td> </tr> </table> </div> <div id="event:remove"> <h3 class="methodname">remove <a class="font-icon" href="#event:remove"></a></h3> <p></p> <h4>Parameters</h4> <table> <tr> <td>tag</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></td><td><p>Name of a tag removed from a set.</p></td> </tr> <tr> <td>parent</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></td><td><p>Parent object who tags belong to.</p></td> </tr> </table> </div> <h2>Inherited</h2>   <h2>Methods</h2> <div id="fire"> <h3 class="methodname">fire(name, [arg1], [arg2], [arg3], [arg4], [arg5], [arg6], [arg7], [arg8]) <a class="font-icon" href="#fire"></a></h3> <p><p>Fire an event, all additional arguments are passed on to the event listener.</p></p> <pre><code class="javascript">obj.fire('test', 'This is the message');</code></pre> <h4>Parameters</h4> <table> <tr> <td>name</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></td><td><p>Name of event to fire.</p></td> </tr> <tr> <td>arg1</td><td><a href="#">*</a></td><td><p>First argument that is passed to the event handler.</p></td> </tr> <tr> <td>arg2</td><td><a href="#">*</a></td><td><p>Second argument that is passed to the event handler.</p></td> </tr> <tr> <td>arg3</td><td><a href="#">*</a></td><td><p>Third argument that is passed to the event handler.</p></td> </tr> <tr> <td>arg4</td><td><a href="#">*</a></td><td><p>Fourth argument that is passed to the event handler.</p></td> </tr> <tr> <td>arg5</td><td><a href="#">*</a></td><td><p>Fifth argument that is passed to the event handler.</p></td> </tr> <tr> <td>arg6</td><td><a href="#">*</a></td><td><p>Sixth argument that is passed to the event handler.</p></td> </tr> <tr> <td>arg7</td><td><a href="#">*</a></td><td><p>Seventh argument that is passed to the event handler.</p></td> </tr> <tr> <td>arg8</td><td><a href="#">*</a></td><td><p>Eighth argument that is passed to the event handler.</p></td> </tr> </table> <h4>Returns</h4> <a href="pc.EventHandler.html">pc.EventHandler</a> <p>Self for chaining.</p> </div> <div id="hasEvent"> <h3 class="methodname">hasEvent(name) <a class="font-icon" href="#hasEvent"></a></h3> <p><p>Test if there are any handlers bound to an event name.</p></p> <pre><code class="javascript">obj.on('test', function () { }); // bind an event to 'test' obj.hasEvent('test'); // returns true obj.hasEvent('hello'); // returns false</code></pre> <h4>Parameters</h4> <table> <tr> <td>name</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></td><td><p>The name of the event to test.</p></td> </tr> </table> <h4>Returns</h4> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean">boolean</a> <p>True if the object has handlers bound to the specified event name.</p> </div> <div id="off"> <h3 class="methodname">off([name], [callback], [scope]) <a class="font-icon" href="#off"></a></h3> <p><p>Detach an event handler from an event. If callback is not provided then all callbacks are unbound from the event, if scope is not provided then all events with the callback will be unbound.</p></p> <pre><code class="javascript">var handler = function () { }; obj.on('test', handler); obj.off(); // Removes all events obj.off('test'); // Removes all events called 'test' obj.off('test', handler); // Removes all handler functions, called 'test' obj.off('test', handler, this); // Removes all hander functions, called 'test' with scope this</code></pre> <h4>Parameters</h4> <table> <tr> <td>name</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></td><td><p>Name of the event to unbind.</p></td> </tr> <tr> <td>callback</td><td><a href="pc.callbacks.html#HandleEvent">pc.callbacks.HandleEvent</a></td><td><p>Function to be unbound.</p></td> </tr> <tr> <td>scope</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></td><td><p>Scope that was used as the this when the event is fired.</p></td> </tr> </table> <h4>Returns</h4> <a href="pc.EventHandler.html">pc.EventHandler</a> <p>Self for chaining.</p> </div> <div id="on"> <h3 class="methodname">on(name, callback, [scope]) <a class="font-icon" href="#on"></a></h3> <p><p>Attach an event handler to an event.</p></p> <pre><code class="javascript">obj.on('test', function (a, b) { console.log(a + b); }); obj.fire('test', 1, 2); // prints 3 to the console</code></pre> <h4>Parameters</h4> <table> <tr> <td>name</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></td><td><p>Name of the event to bind the callback to.</p></td> </tr> <tr> <td>callback</td><td><a href="pc.callbacks.html#HandleEvent">pc.callbacks.HandleEvent</a></td><td><p>Function that is called when event is fired. Note the callback is limited to 8 arguments.</p></td> </tr> <tr> <td>scope</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></td><td><p>Object to use as 'this' when the event is fired, defaults to current this.</p></td> </tr> </table> <h4>Returns</h4> <a href="pc.EventHandler.html">pc.EventHandler</a> <p>Self for chaining.</p> </div> <div id="once"> <h3 class="methodname">once(name, callback, [scope]) <a class="font-icon" href="#once"></a></h3> <p><p>Attach an event handler to an event. This handler will be removed after being fired once.</p></p> <pre><code class="javascript">obj.once('test', function (a, b) { console.log(a + b); }); obj.fire('test', 1, 2); // prints 3 to the console obj.fire('test', 1, 2); // not going to get handled</code></pre> <h4>Parameters</h4> <table> <tr> <td>name</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String">string</a></td><td><p>Name of the event to bind the callback to.</p></td> </tr> <tr> <td>callback</td><td><a href="pc.callbacks.html#HandleEvent">pc.callbacks.HandleEvent</a></td><td><p>Function that is called when event is fired. Note the callback is limited to 8 arguments.</p></td> </tr> <tr> <td>scope</td><td><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object">object</a></td><td><p>Object to use as 'this' when the event is fired, defaults to current this.</p></td> </tr> </table> <h4>Returns</h4> <a href="pc.EventHandler.html">pc.EventHandler</a> <p>Self for chaining.</p> </div>  </main> </div> </body> </html>