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

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

规范名称 规范状态 备注
CSS Object Model (CSSOM) View Module
offsetTop
Working Draft

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
offsetTop
Experimental
Chrome Full support 47Edge Full support 12Firefox Full support 1IE Full support YesOpera Full support YesSafari Full support 11WebView Android Full support 47Chrome Android Full support 47Firefox Android Full support 4Opera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

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.)