释放鼠标按钮时会触发onmouseup事件。
您可以尝试运行以下代码以了解如何在JavaScript中使用onmouseup事件-
<html>
<head>
<script>
<!--
function sayHello() {
alert("Mouse Up")
}
//-->
</script>
</head>
<body>
<p onmouseup = "sayHello()">This is demo text for mouseup event.</p>
</body>
</html>