获div的属性值

Question

根据下边的a 标签 ，点击获取上边 tree-id 的值，代码是这么写得

var rowIndex = $(this).parents().attr("tree-id")

但是得到的值是undefined，求指点

Answer 1

$(this).parents('.tree-row').attr('tree-id')

Answer 2

var rowIndex = $(this).closest('.tree-row').attr("tree-id")

Answer 3

parents()返回的是所有父对象集合。
var parentDom =  $('.tree-row[tree-id]');
$(this).parent(parentDom).attr("tree-id");或者直接
$(this).parent().parent().parent().attr("tree-id");

Answer 4

a标签获取到了吗？比如获取到a为linkNode

let node = linkNode.parentNode.parentNode
node.getAttribute('tree-id')