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MouseEvent.clientX 是只读属性, 它提供事件发生时的应用客户端区域的水平坐标 (与页面坐标不同)。例如,不论页面是否有水平滚动,当你点击客户端区域的左上角时,鼠标事件的 clientX 值都将为 0 。最初这个属性被定义为长整型(long integer),如今 CSSOM 视图模块将其重新定义为双精度浮点数(double float)。你可以查阅浏览器兼容性部分的文档来进一步了解有关信息。

语法


var x = instanceOfMouseEvent.clientX

返回值

一个数字

示例

<!DOCTYPE html> 
<html>
  <head>
    <title>clientX/clientY example</title>

    <script>
      function showCoords(evt){
        alert(
          "clientX value: " + evt.clientX + "\n" +
          "clientY value: " + evt.clientY + "\n"
        );
      }
    </script>
  </head>
  <body onmousedown="showCoords(event)">
    <p>To display the mouse coordinates click anywhere on the page.</p>
  </body>
</html>

规范

Specification Status Comment
Document Object Model (DOM) Level 3 Events Specification
MouseEvent.clientX
Obsolete No change from Document Object Model (DOM) Level 2 Events Specification.
Document Object Model (DOM) Level 2 Events Specification
MouseEvent.clientX
Obsolete Initial definition.

浏览器兼容性

Feature Firefox (Gecko) Chrome Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Firefox Mobile (Gecko) Android IE Mobile Opera Mobile Safari Mobile
Basic support ? ? ? ? ?

相关

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