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# 实现一个 sleep 函数，比如 sleep(1000) 意味着等待1000毫秒

# 方式一

const sleep = (time) => {
  return new Promise(resolve => setTimeout(resolve, time))
}

sleep(1000).then(() => {
  // 这里写你的骚操作
  console.log(1)
})

# 方式二

const sleep = (time) => {
  return new Promise(resolve => setTimeout(resolve, time))
}

async function sleepAsync() {
  console.log('fuck the code')
  await sleep(1000)
  console.log('fuck the code again')
}

sleepAsync()

# 方式三

//Generator
function* sleepGenerator(time) {
  yield new Promise(function(resolve, reject){
    setTimeout(resolve,time)
  })
}
sleepGenerator(1000).next().value.then(()=>{
  console.log(1)
})

# 方式四

function sleep(callback, time) {
  if(typeof callback === 'function') {
    setTimeout(callback, time)
  }
}

function output(){
  console.log(1)
}
sleep(output, 1000)

← ES6 →