23 lines
515 B
TypeScript
23 lines
515 B
TypeScript
// 声明类
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export class EventBus {
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private eventList: object;
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constructor() {
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//定义事件总线对象
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this.eventList = {};
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}
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//监听，或者说是发布
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on(eventName, fn) {
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let eventItem = this.eventList[eventName];
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eventItem ? eventItem.push(fn) : (this.eventList[eventName] = [fn]);
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}
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//触发，订阅
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emit(eventName, ...arg) {
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this.eventList[eventName] &&
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this.eventList[eventName].forEach((fn) => {
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fn(...arg);
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});
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}
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}
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export default EventBus;
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