export default {
events: {},
addListener(event, callback) {
if (typeof callback !== 'function') {
console.error(`The listener callback must be a function, the given type is ${typeof callback}`);
return false;
}
if (typeof event !== 'string') {
console.error(`The event name must be a string, the given type is ${typeof event}`);
return false;
}
if (this.events[event] === undefined) {
this.events[event] = {
listeners: []
}
}
this.events[event].listeners.push(callback);
},
removeListener(event, callback) {
if (this.events[event] === undefined) {
console.error(`This event: ${event} does not exist`);
return false;
}
this.events[event].listeners = this.events[event].listeners.filter(listener => {
return listener.toString() !== callback.toString();
});
},
dispatch(event, details) {
if (this.events[event] === undefined) {
console.error(`This event: ${event} does not exist`);
return false;
}
this.events[event].listeners.forEach((listener) => {
listener(details);
});
}
}
Simple event dispatcher
Mar 5, 2017 · 1 分钟阅读
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