ORIGIN全文地址:JavaScript专项算法题（6）：Promises推荐：编程鼠标·电竞鼠标Promises期约挑战1问题：让我们从复习异步函数开始吧！使用setTimeout，在1000ms后打印字符串“Hello!”。题解：// Challenge 1functionsayHello(){// ADD CODE HEREsetTimeout(()=console.log('Hello!'),1000)}// Uncomment the line below when readysayHello();// should log "Hello" after 1000ms挑战2问题：创建一个promise。延迟1000ms后在resolve里面传入值“Resolved!”，使用setTimeout。在promise被调用resolve后，打印它的内容，借助传入console.log到.then中来实现。题解：// Challenge 2varpromise=newPromise(function(resolve,reject){// ADD CODE HEREsetTimeout(()=resolve('Resolved'),1000)});// Should print out "Resolved!"// ADD CODE HEREpromise.then(res=console.log(res