不指定文件创建worker

const code = `console.log('worker')`

// 1. Object Url
const blob = new Blob([code], { type: 'applaction/javascript' })
const url = URL.createObjectURL(blob)
const worker1 = new Worker(url)

// 2. Data Url
const dataUrl = `data:appliction/javascript;utf8,${code}`
const worker2 = new Worker(dataUrl)