题解 | #dom 节点查找#
dom 节点查找
http://www.nowcoder.com/practice/74d74be449af4c66907fe2d6961c255c
使用DOM中Node接口的parentNode指针获取父节点，思路同LC236
function commonParentNode(oNode1, oNode2) {
let set = new Set();
let tmp = oNode1;
while(tmp) {
set.add(tmp);
tmp = tmp.parentNode;
}
let res = oNode2;
while(res) {
if(set.has(res)) return res;
else res = res.parentNode;
}
}
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