一个元素中的jQuery检测mousedown,然后在元素之外的mouseup [英] jQuery detect mousedown inside an element and then mouseup outside the element
本文介绍了一个元素中的jQuery检测mousedown,然后在元素之外的mouseup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
$(#element)。mousedown(function(){
$(document) .mouseup(function(){
// do something
});
});
但这当然不行。一个简单的$(document).mouseup也不起作用,因为我有很多其他UI元素,并且每次点击一个UI元素时都会保存状态。
任何想法?
解决方案
var isDown = false;
$(#element)。mousedown(function(){
isDown = true;
});
$(document).mouseup(function(){
if(isDown){
// do something
isDown = false;
}
});
为了简单起见,我把 isDown
在全局命名空间中。在生产中,您可能希望隔离该变量的范围。
I have something similar to a drawing canvas, and I capture it's state on mouseup for undo purposes. The canvas isn't full screen, so you can draw with a brush and release outside the canvas. Something like this:
$("#element").mousedown(function(){
$(document).mouseup(function(){
//do something
});
});
But this doesn't work of course. A plain $(document).mouseup doesn't work either, because I have many other UI elements and it saves the state each time you click on a UI element.
Any ideas?
解决方案
var isDown = false;
$("#element").mousedown(function(){
isDown = true;
});
$(document).mouseup(function(){
if(isDown){
//do something
isDown = false;
}
});
For the sake of simplicity I put isDown
in the global namespace. In production you would probably want to isolate the scope of that variable.
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