whale-plus/lib/upload-sdk/src/upload-core/EventEmitter.js

A Component Library for Vue 3

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

class EventEmitter {
  constructor() {
    this.events = /* @__PURE__ */ new Map();
  }
  on(event, listener) {
    if (!this.events.has(event)) {
      this.events.set(event, /* @__PURE__ */ new Set());
    }
    this.events.get(event).add(listener);
  }
  off(event, listener) {
    if (!this.events.has(event)) {
      return;
    }
    this.events.get(event).delete(listener);
  }
  once(event, listener) {
    const onceListener = (...args) => {
      listener(...args);
      this.off(event, onceListener);
    };
    this.on(event, onceListener);
  }
  emit(event, ...args) {
    if (!this.events.has(event)) {
      return;
    }
    this.events.get(event).forEach((listener) => {
      listener(...args);
    });
  }
}

exports.EventEmitter = EventEmitter;
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