PostCSS Short Spacing lets you omit sides within margin and padding properties in CSS.

section {
  margin: 1em *;
}
/* becomes */
section {
  margin-top: 1em;
  margin-bottom: 1em;
}

Supported properties include margin, margin-block, margin-inline, margin-start, margin-end, padding, padding-block, padding-inline, padding-start, and padding-end.

Usage

Add PostCSS Short Spacing to your project:

npm install postcss-short-spacing --save-dev

Use PostCSS Short Spacing to process your CSS:

const postcssShortSpacing = require('postcss-short-spacing');
postcssShortSpacing.process(YOUR_CSS /*, processOptions, pluginOptions */);

Or use it as a PostCSS plugin:

const postcss = require('postcss');
const postcssShortSpacing = require('postcss-short-spacing');
postcss([
  postcssShortSpacing(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);

PostCSS Short Spacing runs in all Node environments, with special instructions for:

Node	PostCSS CLI	Webpack	Create React App	Gulp	Grunt

Options

prefix

The prefix option defines a prefix required by properties being transformed. Wrapping dashes are automatically applied, so that x would transform -x-margin.

postcssShortSpacing({ prefix: 'x' });

body {
  -x-margin: 1em *;
}
/* becomes */
section {
  margin-top: 1em;
  margin-bottom: 1em;
}

skip

The skip option defines the skip token used to ignore portions of the shorthand.

postcssShortSpacing({ skip: '-' });

body {
  -x-margin: 1em -;
}
/* becomes */
section {
  margin-top: 1em;
  margin-bottom: 1em;
}