function offset(el) {
let left = 0
let top = 0
while (el) {
left -= el.offsetLeft
top -= el.offsetTop
el = el.offsetParent
}
return {
left,
top,
}
}
+号求得是 el 到 body 元素的偏移距离
-号是啥玩意.....
This topic created in 2347 days ago, the information mentioned may be changed or developed.
2 replies • 2019-12-16 17:51:50 +08:00
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1
imherer Dec 16, 2019
不都是求和么？只不过一个正一个负
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