Function createEvent

packages/engine.io-client/test/connection.js:219–228

(name)

      });

      const createEvent = (name) => {
        if (typeof Event === "function") {
          return new Event(name);
        } else {
          // polyfill for IE
          const event = document.createEvent("Event");
          event.initEvent(name, true, true);
          return event;
        }
      };

      socket.on("open", () => {
        const handler = () => {