--- title: MouseEvent.offsetX slug: Web/API/MouseEvent/offsetX tags: - API - 只读 - 属性 - 鼠标事件 translation_of: Web/API/MouseEvent/offsetX ---

{{APIRef("DOM Events")}}{{SeeCompatTable}}

{{domxref("MouseEvent")}} 接口的只读属性 offsetX 规定了事件对象与目标节点的内填充边(padding edge)在 X 轴方向上的偏移量。

语法

var xOffset = instanceOfMouseEvent.offsetX;

返回值

一个双精度 浮点值。早期的规范将其规定为整数值。详见浏览器兼容性部分。

规范

Specification Status Comment
{{SpecName('CSSOM View', '#dom-mouseevent-offsetx', 'MouseEvent')}} {{Spec2('CSSOM View')}} Initial definition

浏览器兼容性

{{ CompatibilityTable() }}

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support {{CompatVersionUnknown}} {{CompatVersionUnknown}} {{CompatGeckoDesktop("39.0")}} 6 {{ CompatVersionUnknown() }} {{ CompatVersionUnknown() }}
Redefined from long to double {{CompatChrome(56)}} {{ CompatUnknown() }} {{ CompatUnknown() }} {{ CompatUnknown() }} {{ CompatUnknown() }} {{ CompatUnknown() }}
Feature Android Webview Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support {{CompatVersionUnknown}} {{CompatVersionUnknown}} {{CompatVersionUnknown}} {{CompatGeckoMobile("43.0")}} {{ CompatUnknown() }} {{ CompatUnknown() }} {{ CompatUnknown() }}
Redefined from long to double {{CompatChrome(56)}} {{CompatChrome(56)}} {{ CompatUnknown() }} {{ CompatUnknown() }} {{ CompatUnknown() }} {{ CompatUnknown() }} {{ CompatUnknown() }}

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