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Belajar Tailwind CSS #26 Functions and directives

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Ahmad Dika Zulfahmi

10 April 2025

1. @import

Penjelasan Singkat:

Digunakan untuk mengimpor file CSS lain, termasuk file Tailwind itu sendiri.

Contoh:

@import "tailwindcss";

Ini artinya kamu memasukkan seluruh Tailwind ke dalam file CSS-mu.

2. @theme

Penjelasan Singkat:

Digunakan untuk mendefinisikan warna, font, ukuran, dan sebagainya yang bisa kamu pakai di seluruh proyek.

Contoh:

@theme {
  --font-display: "Satoshi", "sans-serif";
  --color-avocado-500: oklch(0.84 0.18 117.33);
}

Full HTML:

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <script src="https://cdn.tailwindcss.com"></script>
  <style type="text/tailwindcss">
    @theme {
      --font-display: "Satoshi", "sans-serif";
      --color-avocado-500: oklch(0.84 0.18 117.33);
    }
  </style>
</head>
<body class="font-[var(--font-display)] bg-[oklch(0.84_0.18_117.33)] text-white h-screen flex items-center justify-center">
  <h1 class="text-3xl">Warna Avocado</h1>
</body>
</html>

berikut hasilnya:

3. @source

Penjelasan Singkat:

Kalau Tailwind gak bisa otomatis mendeteksi semua file HTML/JS kamu, kamu bisa bantu dia dengan directive ini.

@source "../node_modules/@my-company/ui-lib";

Biasanya dipakai di proyek besar atau jika kamu pakai UI library buatan sendiri.

4. @utility

Penjelasan Singkat:

Membuat class utility baru sendiri yang bisa dipakai seperti hover:bg-red-500, dsb.

@utility tab-4 {
  tab-size: 4;
}

Setelah kamu bikin ini, kamu bisa pakai di HTML:

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="app.css">
</head>

<body>
    <div class="tab-4">Teks ini pakai tab-size 4</div>
</body>

</html>

berikut hasilnya:

5. @variant

Penjelasan Singkat:

Menambahkan varian seperti dark: atau hover: ke CSS buatan sendiri.

Contoh:

.my-element {
  background: white;
  @variant dark {
    background: black;
  }
}

6. @custom-variant

Penjelasan Singkat:

Bikin varian khusus sendiri, misalnya berdasarkan data-theme.

@custom-variant theme-midnight (&:where([data-theme="midnight"] *));

Lalu kamu bisa pakai di HTML:

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="app.css">
</head>

<body>
    <div data-theme="midnight" class="theme-midnight:bg-black theme-midnight:text-white">Contoh</div>
</body>

</html>

berikut hasilnya:

7. @apply

Penjelasan Singkat:

Digunakan untuk menyalin utility Tailwind ke dalam file CSS biasa.

Contoh:

.btn {
  @apply bg-blue-500 text-white px-4 py-2 rounded;
}

Full HTML:

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <script src="https://cdn.tailwindcss.com"></script>
</head>
<body class="p-10">
  <button class="bg-blue-500 hover:bg-blue-600 text-white font-semibold py-2 px-4 rounded shadow">
    Klik Saya
  </button>
</body>
</html>

berikut hasilnya:

8. @reference

Penjelasan Singkat:

Kalau kamu pakai Vue/Svelte/React dan pakai <style> terpisah, directive ini dipakai supaya bisa akses @apply, @variant, dll tanpa duplikasi CSS.

<style>
  @reference "tailwindcss";
  h1 {
    @apply text-2xl font-bold text-red-500;
  }
</style>

9. --alpha()

Penjelasan Singkat:

Fungsi untuk mengatur tingkat transparansi/opacity warna.

.my-element {
  color: --alpha(var(--color-lime-300) / 50%);
}

Hasilnya warna lime 50% transparan.

10. --spacing()

Penjelasan Singkat:

Fungsi untuk menghasilkan nilai spacing sesuai skala Tailwind.

.my-element {
  margin: --spacing(4);
}

Artinya: margin: calc(var(--spacing) * 4);

Contoh HTML:

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="app.css">
</head>

<body class="p-5">
    
    <div class="py-[calc(--spacing(4)-1px)]">
        Konten dengan padding atas bawah sesuai spacing
    </div>

</body>

</html>

berikut hasilnya:

11. @config dan @plugin (Legacy Tailwind v3.x)

Penjelasan Singkat:

Kalau kamu masih pakai Tailwind versi lama dan config-nya di file tailwind.config.js, kamu bisa:

@config "../../tailwind.config.js";
@plugin "@tailwindcss/typography";

Tapi kalau kamu sudah pakai Tailwind versi 4 atau lebih, ini tidak terlalu dibutuhkan lagi.

12. theme() (Legacy function)

Penjelasan Singkat:

Fungsi ini dipakai untuk mengakses value tema Tailwind dari CSS biasa (versi 3.x).

.my-element {
  margin: theme(spacing.12);
}

 

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