Is there any way to get another element value in Less?

问题

I'm new to Less.

In my script, I'd like to use the width of box1 in box2.

Please review my script.

#box1
{
    width: 1000px;
    height: 500px;
}
#box2
{
    width: #box1.width - 100px;
}

Is it possible or not? If yes, please give me correct Less code.

回答1:

unfortunatly it is indeed not possible. You could work with variables and do something like this however:

@box1width: 1000px;
#box1
{
    width: @box1width;
    height: 500px;
}
#box2
{
    width: @box1width - 100;
}

回答2:

No, that's not possible. LESS processes the style sheet to produce CSS, and it doesn't have any knowledge of the elements in the page.

What you are looking for is CSS Expressions, but that was only supported in Internet Explorer, and support for that was dropped in IE8.

来源：https://stackoverflow.com/questions/13778100/is-there-any-way-to-get-another-element-value-in-less