{
  "workers": "workers"
}

{
  "workers": {
    "path": "workers",
    "isSubpackage": true // true means the Worker is packaged as a subpackage. Default is false. Setting false is equivalent to { "workers": "workers" }
  }
}

workers/request/index.js
workers/request/utils.js
workers/response/index.js

├── game.js
├── game.json
├── project.config.json
└── workers
    ├── request
    │ ├── index.js
    │ └── utils.js
    └── response
        └── index.js

const utils = require('./utils')
// In the Worker thread execution context, a global worker object is exposed. Use worker.onMessage/postMessage directly
worker.onMessage(function (res) {
  console.log(res)
})

const worker = wx.createWorker('workers/request/index.js') // Specify the Worker entry file path, absolute path

var task = wx.preDownloadSubpackage({
   packageType: "workers", 
   success(res) {
      console.log("load worker success", res)
      var worker = wx.createWorker("workers/request/index.js") // Create Worker If the Worker subpackage is not fully downloaded, calling createWorker will result in an error
   },
   fail(res) {
      console.log("load worker fail", res)
   }
})

task.onProgressUpdate(res => {
  console.log(res.progress) // Monitor download progress using onProgressUpdate
  console.log(res.totalBytesWritten)
  console.log(res.totalBytesExpectedToWrite)
})

worker.postMessage({
  msg: 'hello worker'
})