fine-true/lib/table/component/Emitter.ts

A small and beautiful Vue3 version of the UI Library

type EmitterEventsMap = Map<string, ((...args: any[]) => any)[]>;
class Emitter {
  eventsMap: EmitterEventsMap;
  constructor() {
    this.eventsMap = new Map();
  }
  emit(action: string, ...args: any[]) {
    if (!action) return;
    const methods = this.eventsMap.get(action);
    if (!methods) return;
    methods.forEach((method) => {
      method.call(this, ...args);
    });
  }
  on(action: string, method: (...args: any[]) => any) {
    if (!action || !method) return;

    let methods = this.eventsMap.get(action);
    if (!methods) {
      methods = [];
      this.eventsMap.set(action, methods);
    }
    if (!methods.includes(method)) {
      methods.push(method);
    }
  }
}

export default Emitter;