TypeError: Invalid PostCSS Plugin found at: plugins[5]

[balex25]

Hi,

I try to install this plugin with underscoretw.com (WordPress theme on tailwind), but it seems I am getting something wrong.

postcss.config.js

module.exports = {
	plugins: [
		require( 'postcss-import-ext-glob' ),
		require( 'postcss-import' ),
		require( 'postcss-simple-vars' )( { variables: selectors } ),
		require( 'tailwindcss/nesting' ),
		require( 'tailwindcss' ),
		new MangleCssClassPlugin({
			classNameRegExp: '((hover|focus|active|disabled|visited|first|last|odd|even|group-hover|focus-within|xs|sm|md|lg|xl)[\\\\]*:)*tw-[a-zA-Z0-9_-]*([\\\\]*\/[0-9]*)?',
			ignorePrefixRegExp: '((hover|focus|active|disabled|visited|first|last|odd|even|group-hover|focus-within|xs|sm|md||lg|xl)[\\\\]*:)*',
			log: true,
		}),
	],
};

When I run the build, I get TypeError: Invalid PostCSS Plugin found at: plugins[5].

Any help will be appreciated, thanks!

[sndyuk]

@balex25 It is a Webpack plugin, not for PostCSS.