SharedWorker没有打印结果？？

Question

//demo2.js
var myWorker = new SharedWorker('test.js');
    myWorker.port.start();
    myWorker.port.postMessage("ali2")
    myWorker.port.onmessage = function (e) {
        console.log("demo2")
        console.log(e)
    }

//demo2.js
var myWorker = new SharedWorker('test.js');
    myWorker.port.start();
    myWorker.port.postMessage("ali1")
    myWorker.port.onmessage = function (e) {
        console.log("demo1")
        console.log(e)
    }

onconnect  = function (e) {
  let port = e.ports[0];
  port.start();
  //console.log(e.ports);
  port.onmessage = function (e) {
    port.postMessage("from worker");
  };
};

两个页面都没有打印出结果？？？