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<script>
  function fn(...params) {
    console.log(this, params)
  }

  const obj = {
    name: '小明',
  }
  fn()
  fn.call(obj, 'hello', 1, 23)
  fn.apply(obj, ['hello', 1, 23])
  fn.bind(obj, 'hello', 1, 23)()
</script>