如何创建一个worker线程

import worker from '@ohos.worker';
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const workerInstance = new worker.ThreadWorker("entry/ets/workers/Worker.ts", {name:"first worker"}); 
workerInstance.postMessage("Hello worker")
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workerInstance.onmessage = function(e) { 
  //work线程发送过来的信息 
  console.log('worker to main e：' + JSON.stringify(e)) 
  
  workerInstance.terminate() 
} 
  
// worker线程终止回调 
workerInstance.onexit = function() { 
  console.log('worker has been terminated') 
}
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var workerPort : ThreadWorkerGlobalScope = worker.workerPort;
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workerPort.onmessage = async function(e : MessageEvents) { 接收来自主线程的data信息   console.log('main to worker e: ' + JSON.stringify(e))  发送信息到主线程   workerPort.postMessage('hello main')  }
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