WordPress/wp-content/themes/twentytwentyone/postcss.config.js

module.exports = {
	plugins: [
		require('postcss-nested'),
		require('postcss-css-variables')({
			preserve: false,
			preserveAtRulesOrder: true
		}),
		require('postcss-calc')({
			precision: 0
		}),
		require('postcss-discard-duplicates')
	]
};
Twenty Twenty-One: Bring back PostCSS config. Twenty Twenty-One uses PostCSS to convert the custom properties for Internet Explorer. Without a config file, the postcss command does nothing, causing issues in IE. This brings back the config from GitHub, which replaces all custom properties with the default values. Props t-p, poena. Fixes #52040. Built from https://develop.svn.wordpress.org/trunk@49800 git-svn-id: http://core.svn.wordpress.org/trunk@49523 1a063a9b-81f0-0310-95a4-ce76da25c4cd 2020-12-14 17:49:03 +01:00			`module.exports = {`
			`plugins: [`
			`require('postcss-nested'),`
			`require('postcss-css-variables')({`
			`preserve: false,`
			`preserveAtRulesOrder: true`
			`}),`
			`require('postcss-calc')({`
			`precision: 0`
Twenty Twenty-One: Remove duplicate CSS rules. Introduces a new PostCSS plugin, `postcss-discard-duplicates`, which will automatically remove any duplicate CSS rules. All the CSS that is removed shows up again later in the file. This also fixes a bug from `postcss-css-variables`, where media queries are duplicated. Fixes #52158. Props poena. Built from https://develop.svn.wordpress.org/trunk@49980 git-svn-id: http://core.svn.wordpress.org/trunk@49681 1a063a9b-81f0-0310-95a4-ce76da25c4cd 2021-01-18 18:53:09 +01:00			`}),`
			`require('postcss-discard-duplicates')`
Twenty Twenty-One: Bring back PostCSS config. Twenty Twenty-One uses PostCSS to convert the custom properties for Internet Explorer. Without a config file, the postcss command does nothing, causing issues in IE. This brings back the config from GitHub, which replaces all custom properties with the default values. Props t-p, poena. Fixes #52040. Built from https://develop.svn.wordpress.org/trunk@49800 git-svn-id: http://core.svn.wordpress.org/trunk@49523 1a063a9b-81f0-0310-95a4-ce76da25c4cd 2020-12-14 17:49:03 +01:00			`]`
			`};`