1 changed files with 2 additions and 0 deletions
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app/js/EventCaller.js
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| * @returns {this} | * @returns {this} | ||||
| */ | */ | ||||
| listen(eventName, callback, owner=null, once=false){ | listen(eventName, callback, owner=null, once=false){ | ||||
| if (typeof(callback) !== 'function') | |||||
| throw new TypeError("Expected callback argument to be a function or class method."); | |||||
| try{ | try{ | ||||
| if (!this.is_listening(eventName, callback, owner)){ | if (!this.is_listening(eventName, callback, owner)){ | ||||
| if (!this.__listeners.hasOwnProperty(eventName)){ | if (!this.__listeners.hasOwnProperty(eventName)){ |
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