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EventDispatcher converted to es6 #20943

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EventDispatcher converted to es6 #20943

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21 changes: 9 additions & 12 deletions src/core/EventDispatcher.js
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Expand Up @@ -2,11 +2,9 @@
* https://github.com/mrdoob/eventdispatcher.js/
*/

function EventDispatcher() {}
class EventDispatcher {

Object.assign( EventDispatcher.prototype, {

addEventListener: function ( type, listener ) {
addEventListener( type, listener ) {

if ( this._listeners === undefined ) this._listeners = {};

Expand All @@ -24,19 +22,18 @@ Object.assign( EventDispatcher.prototype, {

}

},
}

hasEventListener: function ( type, listener ) {
hasEventListener( type, listener ) {

if ( this._listeners === undefined ) return false;

const listeners = this._listeners;

return listeners[ type ] !== undefined && listeners[ type ].indexOf( listener ) !== - 1;

},
}

removeEventListener: function ( type, listener ) {
removeEventListener( type, listener ) {

if ( this._listeners === undefined ) return;

Expand All @@ -55,9 +52,9 @@ Object.assign( EventDispatcher.prototype, {

}

},
}

dispatchEvent: function ( event ) {
dispatchEvent( event ) {

if ( this._listeners === undefined ) return;

Expand All @@ -81,7 +78,7 @@ Object.assign( EventDispatcher.prototype, {

}

} );
}


export { EventDispatcher };