tiny-vue/examples/sites/tiny-uno/variants/important.js

// !                   !c-error
export default (matcher) => {
  if (!matcher.startsWith('!')) return matcher
  return {
    matcher: matcher.slice(1),
    body: (body) => {
      body.forEach((e) => {
        e[1] && (e[1] += ' !important')
      })
      return body
    }
  }
}