Function handler

packages/engine.io-client/test/connection.js:231–237

()

      socket.on(class="st">"open", () => {
        const handler = () => {
          expect(socket.transport.readyState).to.eql(class="st">"closed");
          expect(() => socket.write(class="st">"ignored")).to.not.throwException();

          removeEventListener(class="st">"beforeunload", handler, false);
          done();
        };

        addEventListener(class="st">"beforeunload", handler, false);
        dispatchEvent(createEvent(class="st">"beforeunload"));