Can you suggest a simpler method for expressing left:15%;right:15%
, such as using left,right:15%
or something equivalent?
Your assistance is greatly appreciated!
Can you suggest a simpler method for expressing left:15%;right:15%
, such as using left,right:15%
or something equivalent?
Your assistance is greatly appreciated!
Unfortunately, in pure CSS, it is not possible to merge multiple properties into a single declaration.
However, with the help of a CSS preprocessor such as LESS (for example, utilizing a Python-based implementation like pyScss), you can create a mixin like so:
@mixin top-bottom($value) {
top: $value;
bottom: $value;
}
and then apply it in this manner:
.sample {
@include top-bottom(20px);
}
This would generate the following CSS:
.sample {
top: 20px;
bottom: 20px;
}
At this moment, there is no direct way to merge them, but suggestions for using shorthand properties have been put forward.
One proposal suggests the use of 'offset' as a prefix for logical properties like top, left, right, and bottom, with 'offset' acting as the shorthand to set all of them.
— fantasai
Another perspective suggests that 'position' could serve as both the shorthand and prefix. For example:
position: absolute 0 auto 0 0
.
— Brad Kemper
Coincidentally, an existing PostCSS plugin named "Short" already adopts this syntax. https://github.com/jonathantneal/postcss-short/blob/master/README.md — Brad Kemper
If the goal is to avoid repeating the same value, CSS variables can be utilized:
div {
--side: 15%;
left: var(--side);
right: var(--side);
position: absolute;
background: red;
height: 50px;
}
<div></div>
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