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| export default class Bus {
| constructor() {
| this.listeners = new Map();
| }
| on(evtName, listener) {
| const target = this.listeners.get(evtName) || [];
| target.push(listener);
| this.listeners.set(evtName, target);
| }
| emit(evtName) {
| const listeners = this.listeners.get(evtName);
| if (listeners) {
| listeners.forEach((func) => func());
| }
| }
| }
|
|
