@turbox3d/shared/es/event.js

turbox shared internal utility

import _classCallCheck from "@babel/runtime/helpers/esm/classCallCheck";
import _createClass from "@babel/runtime/helpers/esm/createClass";
var Emitter = /*#__PURE__*/function () {
  function Emitter() {
    _classCallCheck(this, Emitter);
    this.listeners = {};
  }
  return _createClass(Emitter, [{
    key: "on",
    value: function on(eventName, callback) {
      var listeners = this.listeners[eventName] || [];
      listeners.push(callback);
      this.listeners[eventName] = listeners;
    }
  }, {
    key: "emit",
    value: function emit(eventName) {
      var _this = this;
      for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        args[_key - 1] = arguments[_key];
      }
      var listeners = this.listeners[eventName];
      if (!Array.isArray(listeners)) return;
      listeners.forEach(function (callback) {
        try {
          callback.apply(_this, args);
        } catch (e) {
          console.error(e);
        }
      });
    }
  }, {
    key: "off",
    value: function off(eventName) {
      if (!this.listeners[eventName]) {
        return;
      }
      this.listeners[eventName] = [];
    }
  }]);
}();
export var emitter = new Emitter();