始终进行 while 循环测试

发布于 2024-12-07 16:08:13 字数 475 浏览 3 评论 0原文

我正在做一个使用 while 循环的简单测试。

这是代码：

var ishovered = 0;

$('a.hovertest').hover(function(){
    ishovered = 1;
},function(){
    ishovered = 0;
});

while(ishovered == 1)
    {
        //execute function
    }

如何使 while 循环一直在测试并且函数在他悬停时立即执行？（是的，我知道我可以将函数放在悬停部分，我问这个是有原因的）

不过它并不一定是一个循环，我只需要一个函数在 ishovered 变为 1 时立即执行。有什么办法可以监控吗？

这是示例： http://jsfiddle.net/9s3zE/

原文

I'm working on a simple test that uses a while loop.

Here is the code:

var ishovered = 0;

$('a.hovertest').hover(function(){
    ishovered = 1;
},function(){
    ishovered = 0;
});

while(ishovered == 1)
    {
        //execute function
    }

How do I make it so that while loop is testing all the time and the function executes as soon as he hovers? (Yes, I know I can put the function in the hover section, I'm asking this for a reason)

It doesn't really have to be a loop though, I just need a function to execute as soon as ishovered becomes 1. Is there any way to monitor that?

Here is the example: http://jsfiddle.net/9s3zE/

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泛泛之交 2024-12-14 16:08:13

小提琴：http://jsfiddle.net/9s3zE/1/

使用setInterval 用于此目的。顺便说一句，您正在描述“轮询者”的行为。轮询器检查条件是否计算为 true。如果为真，则激活一个功能。如果为 false，则发生默认行为（可能什么也不发生）。对于这种情况，使用 while 循环并不明智，因为当条件为真时，浏览器将冻结。

var ishovered = 0;
$('a.hovertest').hover(function(){
    ishovered = 1;
},function(){
    ishovered = 0;
});

var showresult = $('#showresult');
window.setInterval(function(){
    if(ishovered == 1){
        showresult.text("You hovered");
    }
    else if(showresult.text() == "You hovered"){
        showresult.text("Default text (not hovered)");
    }
}, 100);

Fiddle: http://jsfiddle.net/9s3zE/1/

Use setInterval for this purpose. You're describing the behaviour of a "poller", by the way. A poller checks whether a condition evaluates to true. If true, a function is activated. If false, the default behaviour (possible nothing) occurs. It's not wise to use a while loop for this case, because the browser will freeze when the condition is true.

var ishovered = 0;
$('a.hovertest').hover(function(){
    ishovered = 1;
},function(){
    ishovered = 0;
});

var showresult = $('#showresult');
window.setInterval(function(){
    if(ishovered == 1){
        showresult.text("You hovered");
    }
    else if(showresult.text() == "You hovered"){
        showresult.text("Default text (not hovered)");
    }
}, 100);

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