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watak

返回值:Object{top,left}offset([coordinates])

概述

获取匹配元素在当前视口的相对偏移。

返回的对象包含两个整型属性:top 和 left。此方法只对可见元素有效。

参数

coordinatesObject{top,left}, function(index, coords) V1.2

一个对象,必须包含top和left属性,作为元素的新坐标。这个参数也可以是一个返回一对坐标的函数,函数的第一个参数是元素的索引,第二个参数是当前的坐标。

示例

无参数描述:

获取第二段的偏移

HTML 代码:
<p>Hello</p><p>2nd Paragraph</p>
jQuery 代码:
var p = $("p:last");
var offset = p.offset();
p.html( "left: " + offset.left + ", top: " + offset.top );
结果:
<p>Hello</p><p>left: 0, top: 35</p>

参数coordinates 描述:

获取第二段的偏移

HTML 代码:
<p>Hello</p><p>2nd Paragraph</p>
jQuery 代码:
$("p:last").offset({ top: 10, left: 30 });
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