急求！！！！JS中异步调用可以转化为同步调用吗？万分感谢

Question

functionwait(){constp=()=>({value:newPromise(resolve=>setTimeout(()=>resolve(),3000))})letstate={next:()=>{state.next=programPartreturnp()}}functionprogramPart(){console.log('unlocked1')state.next=programPart2returnp()}functionprogramPart2(){console.log('unlocked2')console.log('it\'ssync!!')return{value:void0}}returnstate}这个函数该如何调用？

Answer 1

varstate=wait()
state.next()
.value
.then(()=>state.next().value)
.then(()=>state.next().value)
.then(()=>console.log(state.next()))
                            

Answer 2

可以使用async函数来实现视觉上的同步调用。async是Generator函数的语法糖。
constfn=asyncfunction(){
letstate=wait();
awaitstate.next().value;
awaitstate.next().value;
returnstate.next().value;
}
fn()