浏览器和nodejs中setTimeout中的this指向问题

// 全局 this 指向 global
// setTimeout this是 {}

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// 浏览器：Window   node: Timeout
// strict: 浏览器：Window   node: Timeout
setTimeout(function () { console.log(2, this) }, 0)
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// 浏览器：Window   node: {}
// strict: 浏览器：Window   node: {}
setTimeout(() => { console.log(3, this) }, 1)
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;(function () {
  // 浏览器：Window   node: global
  // strict: 浏览器：undefined   node: undefined
  console.log(1, this)

  // 浏览器：Window   node: Timeout
  // strict: 浏览器：Window   node: Timeout
  setTimeout(function () { console.log(4, this) })

  // 浏览器：Window   node: global
  // strict: 浏览器：undefined   node: undefined
  setTimeout(() => { console.log(5, this) })
})()