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
被 CSSOM View Module 重新定义为一个 double
类型的浮点值. 原来这个属性是被定义为一个 long
整数. 可以在 "浏览器兼容性" 那里查看详细内容.
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 |
---|---|---|
CSS Object Model (CSSOM) View Module clientX |
Working Draft | Redefines MouseEvent from long to double . |
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
BCD tables only load in the browser
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.