Node.js process.nextTick()

当将一个函数传给 process.nextTick(callFn) 时，则指示引擎在当前操作结束（在下一个事件循环开始之前）时调用此函数：

传递给process.nextTick(callFn)的函数会在当前的这次事件循环末尾被立即执行。

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const bar = () => console.log('bar')

const baz = () => console.log('baz')

const foo = () => {
  console.log('foo')
  new Promise((resolve, reject) =>
  resolve('应该在 bar之后')
  ).then(resolve => console.log(resolve))
  process.nextTick(bar)
  baz()
}

foo()



//foo
//baz
//bar
//应该在 bar之后

实时效果反馈

1.下列描述正确的是：

A process.nextTick(()=>console.log('tick'))会在当前循环结束前打印'tick'

B process.nextTick(()=>console.log('tick'))会在下次循环结束前打印'tick'

答案

1=>A