如何用js监听上下滚动到随便某一个div时能获取到该div的id

Question

<nav>    <ul>        <li><a href="#About">About</a></li>        <li><a href="#Skill">Skill</a></li>        <li><a href="#Experience">Experience</a></li>        <li><a href="#More">More</a></li>        <li><a href="#Contact">Contact</a></li>    </ul></nav><div id = "About"></div><div id = "Skill"></div><div id = "AExperience"></div><div id = "More"></div><div id = "Contact"></div>