@arayutw/emitter/dist/scripts/emitter.js

Functional Event Emitter(Pubsub).

/**!
* emitter 0.0.1
* MIT License
* Copyright (c) 2023 Yuta Arai
**/
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : typeof define === 'function' && define.amd ? define(factory) : (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Emitter = factory());
})(this, function () {
  'use strict';

  var __defProp = Object.defineProperty;
  var __defProps = Object.defineProperties;
  var __getOwnPropDescs = Object.getOwnPropertyDescriptors;
  var __getOwnPropSymbols = Object.getOwnPropertySymbols;
  var __hasOwnProp = Object.prototype.hasOwnProperty;
  var __propIsEnum = Object.prototype.propertyIsEnumerable;
  var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, {
    enumerable: true,
    configurable: true,
    writable: true,
    value
  }) : obj[key] = value;
  var __spreadValues = (a, b) => {
    for (var prop in b || (b = {})) if (__hasOwnProp.call(b, prop)) __defNormalProp(a, prop, b[prop]);
    if (__getOwnPropSymbols) for (var prop of __getOwnPropSymbols(b)) {
      if (__propIsEnum.call(b, prop)) __defNormalProp(a, prop, b[prop]);
    }
    return a;
  };
  var __spreadProps = (a, b) => __defProps(a, __getOwnPropDescs(b));
  class Emitter {
    constructor() {
      this.Emitter$items = [];
    }
    on(name, handler, options) {
      this.off(name, handler);
      this.Emitter$items.push([name, handler, {
        once: !!(options == null ? void 0 : options.once)
      }]);
    }
    off(name, handler) {
      for (let a = this.Emitter$items, i = 0; a.length > i; i++) {
        if ("*" === name || a[i][0] === name && a[i][1] === handler) {
          a.splice(i--, 1);
        }
      }
    }
    emit(name, event) {
      this.Emitter$items.forEach(entry => {
        var _a;
        if (name === entry[0]) {
          entry[1](__spreadProps(__spreadValues({}, event), {
            target: this,
            type: name
          }));
          if ((_a = entry[2]) == null ? void 0 : _a.once) this.off(name, entry[1]);
        }
      });
    }
  }
  return Emitter;
});