判断两个元素是否拥有同一父级元素

Question

粗糙写下代码结构，〈ul〉〈li〉〈／li〉〈li〉〈／li〉〈li〉〈／li〉〈／ul〉，有很多个ul，每个ul都有多个li。如何判断两个li是否拥有同一父亲

Answer 1

html&nbsp;<ul>&nbsp; &nbsp; &nbsp; &nbsp; <li id="li1"></li>&nbsp; &nbsp; &nbsp; &nbsp; <li id="li3"></li>&nbsp; &nbsp; &nbsp; &nbsp; <li></li>&nbsp; &nbsp; &nbsp; &nbsp; <li></li>&nbsp; &nbsp; &nbsp; &nbsp; <li></li>&nbsp; &nbsp; </ul>js：var first=document.getElementById('li1').parentNode;var sencond=document.getElementById('li3').parentNode;console.log(first===sencond);