CSS shorthand for positioning

问题:

There are any shorthand for top right bottom left or for width and height ?

I have a lot of css like this

#topDiv {
    position:absolute;
    top:0px;
    left:0px;
    right:0px;
    height:100px;
}
#centerDiv {
    position:absolute;
    top:100px;
    bottom:120px;
    left:0px;
    right:0px;
}
#consoleDiv {
    position:absolute;
    left:0px;
    right:0px;
    bottom:0px;
    height:120px;
}

I would like to do anything like this

position: absolute 10px 50px 50px 100px;

or

size: 400px 200px; 

回答1:

No short-hand exists to combine all of these values. These are all different properties, unlike, for instance background, which has colors, images, positions and repeat instructions and as such can be coalesced into a short-hand form.

If you really wanted this type of control, you could use something like SASS and create a mixin.

回答2:

The answer is no as they are different properties so can not be combined. You can however consolidate your css a little bit rather than repeating certain properties, e.g:

#topDiv,
#centerDiv,
#consoleDiv {
    position:absolute;
    left:0;
    right:0;
}
#topDiv {
    top:0;
    height:100px;
}
#centerDiv {
    top:100px;
    bottom:120px;
}
#consoleDiv {
    bottom:0;
    height:120px;
}

回答3:

I just found this, was looking for the same, I ended up using sass for top, bottom, left, right

here is my solution

@mixin position($top, $right: $top, $bottom: $top, $left: $right) {
    top: $top;
    right: $right;
    bottom: $bottom;
    left: $left;
 }

works like most css shorthands

@include position(5) // all 4

@include position(5,4) // vertical, horizontal

@include position(5,4,3) // top, horizontal, bottom

@include position(5,4,3,2) // top, right, bottom, left

回答4:

If you want shorthand for this, you're gonna need to make what's called a mixin with Sass. Don't know what it is? Look it up!

@mixin position($position, $args) {
  @each $o in top right bottom left {
        $i: index($args, $o);

    @if $i and $i + 1< = length($args) and type-of(nth($args, $i + 1)) == number  {
          #{$o}: nth($args, $i + 1);
    }
  }

  position: $position;
}

@mixin absolute($args) {
        @include position("absolute", $args);
}

@mixin fixed($args) {
        @include position("fixed", $args);
}

@mixin relative($args) {
        @include position("relative", $args);
}

Here's a link that explains it:

http://hugogiraudel.com/2013/08/05/offsets-sass-mixin/