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
offsetTopChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 8Opera Full support 8Safari Full support 3WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0

Legend

Full support  
Full support

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.)