//game.js
console.log("线程", "   函数", "   数据")
const worker = wx.createWorker('workers/index.js')
worker.onMessage(function(e){
  console.log("main", "onMessage", e)
})
worker.postMessage({msg:6})
console.log("main", "postMessage",{msg:6})
worker.postMessage({msg:12})
console.log("main", "postMessage",{msg:12})

//workers/index.js
function postMessage(s) {
  worker.postMessage(s)
  console.log("worker", "postMessage", s)
}
worker.onMessage(function (e) {
  console.log("worker", "onMessage", e)
  setTimeout(() => {
    postMessage(e.msg + 100)
  }, 1000);
})

运行后：