题解 | #dom 节点查找# contains api
dom 节点查找
https://www.nowcoder.com/practice/74d74be449af4c66907fe2d6961c255c
测试用例少，跑过去不代表答案是对的；contains都不用的大部分都是错的
function commonParentNode(oNode1, oNode2) {
// 先判断是否互相包含
if(oNode1.contains(oNode2)) {
return oNode1
}else if(oNode2.contains(oNode1)) {
return oNode2
}else {
// 不包含的时候看哪个node更接近公用的parent
while(oNode1.parentNode || oNode2.parentNode) {
const node1Parent = oNode1.parentNode
const node2Parent = oNode2.parentNode
if(node1Parent && node1Parent.contains(oNode1) && node1Parent.contains(oNode2)) {
return node1Parent
}
if(node2Parent && node2Parent.contains(oNode1) && node2Parent.contains(oNode2)) {
return node2Parent
}
}
}
}
