检测鼠标方向 [英] detect mouse direction
本文介绍了检测鼠标方向的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试使用此代码来检测鼠标方向是上升还是下降:
I am trying this code to detect if the mouse direction is going up or down:
<html>
<head></head>
<body>
<div style="width: 500px; height: 500px; background: red;"></div>
</body>
</html>
var mY = 0;
$('body').mousemove(function(e) {
mY = e.pageY;
if (e.pageY < mY) {
console.log('From Bottom');
return;
} else {
console.log('From Top');
}
});
但是这段代码没有工作是我期待的。控制台日志始终显示从顶部
However this code doesn't work was i expect. Console log always show "from top"
任何想法?
推荐答案
var mY = 0;
$('body').mousemove(function(e) {
// moving upward
if (e.pageY < mY) {
console.log('From Bottom');
// moving downward
} else {
console.log('From Top');
}
// set new mY after doing test above
mY = e.pageY;
});
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