用if语句检查是否mousedown？ [英] Check if mousedown with an if statement?

问题描述

是否可以这样做：

if ($(this).mousedown() == true) {

我认为这样可行，但事实并非如此。

I thought that would work but it doesn't.

其他详细信息：当鼠标离开特定的 DIV 时，我正在尝试检查鼠标按钮是否已关闭，所以如果此人在鼠标离开div时按住鼠标按钮，请执行此操作，否则执行此操作。

Additional details: I'm trying to check if the mouse button is down when the mouse leaves a specific DIV, so if the person is holding the mouse button down while their mouse leaves the div, do this, otherwise do that.

推荐答案

最简单我能想到的方法是将 mousedown 和 mouseup 事件监听器绑定到文档并相应地更新全局变量。在元素的 mouseout 事件中，您可以检查该变量的状态并根据需要采取相应措施。 （注意：这假设你不关心鼠标是否在 div 之上被按下了......你将不得不澄清你的问题那个）。

The easiest way I can think of is to bind mousedown and mouseup event listeners to the document and update a global variable accordingly. In the mouseout event of your element you can check the state of that variable and act as appropriate. (Note: this assumes that you don't care whether or not the mouse was pressed down while over the div or not... you'll have to clarify your question around that).

var down = false;
$(document).mousedown(function() {
    down = true;
}).mouseup(function() {
    down = false;  
});
$("#example").mouseout(function() {
    if(down) {
        console.log("down");  
    } 
    else {
        console.log("up");   
    }
});

这是以上的工作示例。

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