angular-cn/modules/playground/src/web_workers/message_broker/index.ts

import {ApplicationRef} from '@angular/core';
import {bootstrapRender, UiArguments, FnArg, PRIMITIVE, ClientMessageBrokerFactory} from '@angular/platform-browser';

const ECHO_CHANNEL = "ECHO";

export function main() {
  bootstrapRender("loader.js").then((ref) => afterBootstrap(ref));
}

function afterBootstrap(ref: ApplicationRef) {
  let brokerFactory: ClientMessageBrokerFactory = ref.injector.get(ClientMessageBrokerFactory);
  var broker = brokerFactory.createMessageBroker(ECHO_CHANNEL, false);

  document.getElementById("send_echo")
      .addEventListener("click", (e) => {
        var val = (<HTMLInputElement>document.getElementById("echo_input")).value;
        // TODO(jteplitz602): Replace default constructors with real constructors
        // once they're in the .d.ts file (#3926)
        var args = new UiArguments("echo");
        args.method = "echo";
        var fnArg = new FnArg(val, PRIMITIVE);
        fnArg.value = val;
        fnArg.type = PRIMITIVE;
        args.args = [fnArg];

        broker.runOnService(args, PRIMITIVE)
            .then((echo_result: string) => {
              document.getElementById("echo_result").innerHTML =
                  `<span class='response'>${echo_result}</span>`;
            });
      });
}