HTMLElement.offsetTop
HTMLElement.offsetTop
为只读属性,它返回当前元素相对于其 offsetParent
元素的顶部内边距的距离。
语法
topPos = element.offsetTop;
参数
topPos
为返回的像素数。
示例
js
var d = document.getElementById("div1");
var topPos = d.offsetTop;
if (topPos > 10) {
// div1 距离它的 offsetParent 元素的顶部的距离大于 10 px
}
规范
Specification |
---|
CSSOM View Module # dom-htmlelement-offsettop |
Browser compatibility
BCD tables only load in the browser
In compliance with the specification, this property will return null
on Webkit if the element is hidden (the style.display
of this element or any ancestor is "none"
) or if the style.position
of the element itself is set to "fixed"
.
This property will return null
on Internet Explorer (9) if the style.position
of the element itself is set to "fixed"
. (Having display:none
does not affect this browser.)