npm install @csstools/postcss-initial --save-dev

PostCSS Initial fallback the initial keyword following the CSS Cascade 4 Specification.

.foo {
	border: initial;
}
/* becomes */
.foo {
	border: medium none currentcolor;
	border: initial;
}

See prior work by maximkoretskiy here postcss-initial To ensure long term maintenance and to provide the needed features this plugin was recreated based on maximkoretskiy's work.

Usage

Add PostCSS Initial to your project:

npm install postcss @csstools/postcss-initial --save-dev

Use it as a PostCSS plugin:

const postcss = require('postcss');
const postcssInitial = require('@csstools/postcss-initial');
postcss([
	postcssInitial(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */);

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

Options

preserve

The preserve option determines whether the original notation is preserved. By default, it is preserved.

postcssInitial({ preserve: false })

.foo {
	border: initial;
}
/* becomes */
.foo {
	border: medium none currentcolor;
}