tailwindcss/tests/important-selector.test.js

import { crosscheck, run, html, css, defaults } from './util/run'

crosscheck(({ stable, oxide }) => {
  test('important selector', () => {
    let config = {
      important: '#app',
      darkMode: 'class',
      content: [
        {
          raw: html`
            <div class="container"></div>
            <div class="btn"></div>
            <div class="animate-spin"></div>
            <div class="custom-util"></div>
            <div class="custom-component"></div>
            <div class="custom-important-component"></div>
            <div class="font-bold"></div>
            <div class="md:hover:text-right"></div>
            <div class="motion-safe:hover:text-center"></div>
            <div class="dark:focus:text-left"></div>
            <div class="group-hover:focus-within:text-left"></div>
            <div class="rtl:active:text-center"></div>
            <div class="dark:before:underline"></div>
          `,
        },
      ],
      corePlugins: { preflight: false },
      plugins: [
        function ({ addComponents, addUtilities }) {
          addComponents(
            {
              '.btn': {
                button: 'yes',
              },
            },
            { respectImportant: true }
          )
          addComponents(
            {
              '@font-face': {
                'font-family': 'Inter',
              },
              '@page': {
                margin: '1cm',
              },
            },
            { respectImportant: true }
          )
          addUtilities(
            {
              '.custom-util': {
                button: 'no',
              },
            },
            { respectImportant: false }
          )
        },
      ],
    }

    let input = css`
      @tailwind base;
      @tailwind components;
      @layer components {
        .custom-component {
          @apply font-bold;
        }
        .custom-important-component {
          @apply text-center !important;
        }
      }
      @tailwind utilities;
    `

    return run(input, config).then((result) => {
      expect(result.css).toMatchFormattedCss(css`
        ${defaults}
        .container {
          width: 100%;
        }
        @media (min-width: 640px) {
          .container {
            max-width: 640px;
          }
        }
        @media (min-width: 768px) {
          .container {
            max-width: 768px;
          }
        }
        @media (min-width: 1024px) {
          .container {
            max-width: 1024px;
          }
        }
        @media (min-width: 1280px) {
          .container {
            max-width: 1280px;
          }
        }
        @media (min-width: 1536px) {
          .container {
            max-width: 1536px;
          }
        }
        #app .btn {
          button: yes;
        }
        @font-face {
          font-family: Inter;
        }
        @page {
          margin: 1cm;
        }
        .custom-component {
          font-weight: 700;
        }
        .custom-important-component {
          text-align: center !important;
        }
        @keyframes spin {
          to {
            transform: rotate(360deg);
          }
        }
        #app :is(.animate-spin) {
          animation: 1s linear infinite spin;
        }
        #app :is(.font-bold) {
          font-weight: 700;
        }
        .custom-util {
          button: no;
        }
        #app :is(.group:hover .group-hover\:focus-within\:text-left:focus-within) {
          text-align: left;
        }
        #app :is(:is([dir='rtl'] .rtl\:active\:text-center:active)) {
          text-align: center;
        }
        @media (prefers-reduced-motion: no-preference) {
          #app :is(.motion-safe\:hover\:text-center:hover) {
            text-align: center;
          }
        }
        #app :is(.dark .dark\:before\:underline):before {
          content: var(--tw-content);
          text-decoration-line: underline;
        }
        #app :is(:is(.dark .dark\:focus\:text-left:focus)) {
          text-align: left;
        }
        @media (min-width: 768px) {
          #app :is(.md\:hover\:text-right:hover) {
            text-align: right;
          }
        }
      `)
    })
  })

  test('pseudo-elements are appended after the `:is()`', () => {
    let config = {
      important: '#app',
      darkMode: 'class',
      content: [
        {
          raw: html` <div class="dark:before:bg-black"></div> `,
        },
      ],
      corePlugins: { preflight: false },
    }

    let input = css`
      @tailwind base;
      @tailwind components;
      @tailwind utilities;
    `

    return run(input, config).then((result) => {
      stable.expect(result.css).toMatchFormattedCss(css`
        ${defaults}
        #app :is(.dark .dark\:before\:bg-black)::before {
          content: var(--tw-content);
          --tw-bg-opacity: 1;
          background-color: rgb(0 0 0 / var(--tw-bg-opacity));
        }
      `)
      oxide.expect(result.css).toMatchFormattedCss(css`
        ${defaults}
        #app :is(.dark .dark\:before\:bg-black)::before {
          content: var(--tw-content);
          background-color: #000;
        }
      `)
    })
  })
})