如何检测窗口大小然后用 jquery switch 语句做一些事情

How to detect window size and then do something with jquery switch statement(如何检测窗口大小然后用 jquery switch 语句做一些事情)

问题描述

我想使用 jquery 检查窗口大小，并根据不同的分辨率更改背景图像.所以我想以某种方式在更多情况下使用switch"语句，但我只是不知道这会是什么样子.这是我想要的基本结构，但有更多选择:

i would like to check for the window size with jquery and based on the different resolutions i would like to change the background image. So i was thinking to somehow use the "switch" statement for more cases, but i just don't know how this would look like. This is the basic structure i want but with more options:

if ((screen.width>=1024) && (screen.height>=768)) {
 //do something
}
else {
//do something else
}

感谢您的帮助.

推荐答案

switch 语句不会让你做诸如检查特定值之间的数字之类的事情，它也不会让你检查在多个变量上，要么...

The switch statement won't let you do stuff like checking for numbers between certain values, and it won't let you check on multiple variables, either...

所以对于这个特定的场景，我认为最合适的实际上只是一个 if-elseif 语句的列表，就像你已经在做的那样.

So for this particular scenario, I think the best fit is actually just a list of if-elseif statements, like you're already on your way to do.

在 switch 中进行范围检查"真的很冗长:

To do "range checks" in switch is really verbose:

switch(windowWidth) {
    case 1:
    case 2:
    case 3:
    case 4:
    case 5:
        //Do something if value is less than or equal to 5
        break;
    case 6:
    case 7:
    case 8:
    case 9:
    case 10:
        //Do something if value is higher than 5 AND less than or equal to 10
        break;
    ...
    ...
}

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