JavaScript ES6 Generator 函数#

1function* fnc() {
2  console.log('开始')
3  const a = yield '返回给next' // next 没有传参 a 默认 undefined
4  console.log(a, '结束') // next传入 '结束'
5  return '2'
6}
7const f = fnc()
8f.next('next传入') // {value: "返回给 next", done: false}
9f.next() // {value: undefined, done: true}