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我有后续的层次:“菜单>李:第一胎”作为“ getBoundingClientRect()左边的”变量
menu > li:first-child
menu > li:nth-child(2)
menu > li:nth-child(3)
menu > li:nth-child(4)
menu > li:nth-child(5)
menu > li:nth-child(6)
menu > li:nth-child(7)
menu > li:nth-child(8)
menu > li:nth-child(9)
我试图把每一种在给一个变量,以:
var fromleft = box.getBoundingClientRect().left;
var fromtop = box.getBoundingClientRect().top;
它现在的工作与:
var box = document.getElementById('menu');
var fromleft = box.getBoundingClientRect().left;
var fromtop = box.getBoundingClientRect().top;
但与:
var box = document.getElementById('menu > li:first-child');
var fromleft = box.getBoundingClientRect().left;
var fromtop = box.getBoundingClientRect().top;
我需要做什么才能在变量中使用第一个孩子或第n孩子?
我碰到过这个,我认为这是我所需要的,但仍然测试! “var box = document.getElementById('sdt_menu').getElementsByTagName('li')[2];” – Gidiolf