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Dark Mode Bootstrap - Tutorial Bootstrap Pemula (Bagian 3)

Membuat Dark Mode pada Bootstrap 5

Pada Bagian ke-3 ini kita akan belajar membuat Dark Mode pada Bootstrap 5. Sebagai dasar, pada Bagian ke-2 kita sudah mempunyai HTML seperti ini.

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Belajar Bootstrapo</title>
    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-KK94CHFLLe+nY2dmCWGMq91rCGa5gtU4mk92HdvYe+M/SXH301p5ILy+dN9+nJOZ" crossorigin="anonymous">
</head>
<body>
  <header class="bg-primary py-5">
	<div class="container">
		<h1 class="display-4 text-white text-center">Hello, world!</h1>
	</div>
  </header>
  
  <div class="container">
    <p class="mt-5">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Neque vitae tempus quam pellentesque nec nam aliquam sem et. Duis at consectetur lorem donec massa sapien faucibus. Elit ut aliquam purus sit amet luctus venenatis lectus. Commodo nulla facilisi nullam vehicula. Habitasse platea dictumst quisque sagittis. Urna neque viverra justo nec ultrices dui sapien eget mi. Pretium aenean pharetra magna ac placerat vestibulum lectus. Imperdiet proin fermentum leo vel orci porta non pulvinar neque. Lacinia at quis risus sed vulputate. Aliquet nibh praesent tristique magna. Risus viverra adipiscing at in tellus integer. Laoreet suspendisse interdum consectetur libero id faucibus nisl tincidunt eget. Eu non diam phasellus vestibulum lorem sed risus. Elementum nibh tellus molestie nunc non.</p>
  </div>
  
    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-ENjdO4Dr2bkBIFxQpeoTz1HIcje39Wm4jDKdf19U8gI4ddQ3GYNS7NTKfAdVQSZe" crossorigin="anonymous"></script>
</body>
</html>

Menambahkan JavaScript

Langkah pertama adalah penambahan JavaScript. Simpan JS ini di atas </head>

<script>
/*!
 * Color mode toggler for Bootstrap's docs (https://getbootstrap.com/)
 * Copyright 2011-2023 The Bootstrap Authors
 * Licensed under the Creative Commons Attribution 3.0 Unported License.
 */

(() => {
  'use strict'

  const storedTheme = localStorage.getItem('theme')

  const getPreferredTheme = () => {
    if (storedTheme) {
      return storedTheme
    }

    return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light'
  }

  const setTheme = function (theme) {
    if (theme === 'auto' && window.matchMedia('(prefers-color-scheme: dark)').matches) {
      document.documentElement.setAttribute('data-bs-theme', 'dark')
    } else {
      document.documentElement.setAttribute('data-bs-theme', theme)
    }
  }

  setTheme(getPreferredTheme())

  const showActiveTheme = (theme, focus = false) => {
    const themeSwitcher = document.querySelector('#bd-theme')

    if (!themeSwitcher) {
      return
    }

    const themeSwitcherText = document.querySelector('#bd-theme-text')
    const activeThemeIcon = document.querySelector('.theme-icon-active use')
    const btnToActive = document.querySelector(`[data-bs-theme-value="${theme}"]`)
    const svgOfActiveBtn = btnToActive.querySelector('svg use').getAttribute('href')

    document.querySelectorAll('[data-bs-theme-value]').forEach(element => {
      element.classList.remove('active')
      element.setAttribute('aria-pressed', 'false')
    })

    btnToActive.classList.add('active')
    btnToActive.setAttribute('aria-pressed', 'true')
    activeThemeIcon.setAttribute('href', svgOfActiveBtn)
    const themeSwitcherLabel = `${themeSwitcherText.textContent} (${btnToActive.dataset.bsThemeValue})`
    themeSwitcher.setAttribute('aria-label', themeSwitcherLabel)

    if (focus) {
      themeSwitcher.focus()
    }
  }

  window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', () => {
    if (storedTheme !== 'light' || storedTheme !== 'dark') {
      setTheme(getPreferredTheme())
    }
  })

  window.addEventListener('DOMContentLoaded', () => {
    showActiveTheme(getPreferredTheme())

    document.querySelectorAll('[data-bs-theme-value]')
      .forEach(toggle => {
        toggle.addEventListener('click', () => {
          const theme = toggle.getAttribute('data-bs-theme-value')
          localStorage.setItem('theme', theme)
          setTheme(theme)
          showActiveTheme(theme, true)
        })
      })
  })
})()
</script>

Kode HTML

Ini adalah kode HTML berikut SVG icon untuk tombol Dark Mode, silahkan simpan kode ini di bawah <body>

<svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
      <symbol id="check2" viewBox="0 0 16 16">
        <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z"/>
      </symbol>
      <symbol id="circle-half" viewBox="0 0 16 16">
        <path d="M8 15A7 7 0 1 0 8 1v14zm0 1A8 8 0 1 1 8 0a8 8 0 0 1 0 16z"/>
      </symbol>
      <symbol id="moon-stars-fill" viewBox="0 0 16 16">
        <path d="M6 .278a.768.768 0 0 1 .08.858 7.208 7.208 0 0 0-.878 3.46c0 4.021 3.278 7.277 7.318 7.277.527 0 1.04-.055 1.533-.16a.787.787 0 0 1 .81.316.733.733 0 0 1-.031.893A8.349 8.349 0 0 1 8.344 16C3.734 16 0 12.286 0 7.71 0 4.266 2.114 1.312 5.124.06A.752.752 0 0 1 6 .278z"/>
        <path d="M10.794 3.148a.217.217 0 0 1 .412 0l.387 1.162c.173.518.579.924 1.097 1.097l1.162.387a.217.217 0 0 1 0 .412l-1.162.387a1.734 1.734 0 0 0-1.097 1.097l-.387 1.162a.217.217 0 0 1-.412 0l-.387-1.162A1.734 1.734 0 0 0 9.31 6.593l-1.162-.387a.217.217 0 0 1 0-.412l1.162-.387a1.734 1.734 0 0 0 1.097-1.097l.387-1.162zM13.863.099a.145.145 0 0 1 .274 0l.258.774c.115.346.386.617.732.732l.774.258a.145.145 0 0 1 0 .274l-.774.258a1.156 1.156 0 0 0-.732.732l-.258.774a.145.145 0 0 1-.274 0l-.258-.774a1.156 1.156 0 0 0-.732-.732l-.774-.258a.145.145 0 0 1 0-.274l.774-.258c.346-.115.617-.386.732-.732L13.863.1z"/>
      </symbol>
      <symbol id="sun-fill" viewBox="0 0 16 16">
        <path d="M8 12a4 4 0 1 0 0-8 4 4 0 0 0 0 8zM8 0a.5.5 0 0 1 .5.5v2a.5.5 0 0 1-1 0v-2A.5.5 0 0 1 8 0zm0 13a.5.5 0 0 1 .5.5v2a.5.5 0 0 1-1 0v-2A.5.5 0 0 1 8 13zm8-5a.5.5 0 0 1-.5.5h-2a.5.5 0 0 1 0-1h2a.5.5 0 0 1 .5.5zM3 8a.5.5 0 0 1-.5.5h-2a.5.5 0 0 1 0-1h2A.5.5 0 0 1 3 8zm10.657-5.657a.5.5 0 0 1 0 .707l-1.414 1.415a.5.5 0 1 1-.707-.708l1.414-1.414a.5.5 0 0 1 .707 0zm-9.193 9.193a.5.5 0 0 1 0 .707L3.05 13.657a.5.5 0 0 1-.707-.707l1.414-1.414a.5.5 0 0 1 .707 0zm9.193 2.121a.5.5 0 0 1-.707 0l-1.414-1.414a.5.5 0 0 1 .707-.707l1.414 1.414a.5.5 0 0 1 0 .707zM4.464 4.465a.5.5 0 0 1-.707 0L2.343 3.05a.5.5 0 1 1 .707-.707l1.414 1.414a.5.5 0 0 1 0 .708z"/>
      </symbol>
    </svg>

    <div class="dropdown position-fixed bottom-0 end-0 mb-3 me-3 bd-mode-toggle">
      <button class="btn btn-bd-primary py-2 dropdown-toggle d-flex align-items-center"
              id="bd-theme"
              type="button"
              aria-expanded="false"
              data-bs-toggle="dropdown"
              aria-label="Toggle theme (auto)">
        <svg class="bi my-1 theme-icon-active" width="1em" height="1em"><use href="#circle-half"></use></svg>
        <span class="visually-hidden" id="bd-theme-text">Toggle theme</span>
      </button>
      <ul class="dropdown-menu dropdown-menu-end shadow" aria-labelledby="bd-theme-text">
        <li>
          <button type="button" class="dropdown-item d-flex align-items-center" data-bs-theme-value="light" aria-pressed="false">
            <svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em"><use href="#sun-fill"></use></svg>
            Light
            <svg class="bi ms-auto d-none" width="1em" height="1em"><use href="#check2"></use></svg>
          </button>
        </li>
        <li>
          <button type="button" class="dropdown-item d-flex align-items-center" data-bs-theme-value="dark" aria-pressed="false">
            <svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em"><use href="#moon-stars-fill"></use></svg>
            Dark
            <svg class="bi ms-auto d-none" width="1em" height="1em"><use href="#check2"></use></svg>
          </button>
        </li>
        <li>
          <button type="button" class="dropdown-item d-flex align-items-center active" data-bs-theme-value="auto" aria-pressed="true">
            <svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em"><use href="#circle-half"></use></svg>
            Auto
            <svg class="bi ms-auto d-none" width="1em" height="1em"><use href="#check2"></use></svg>
          </button>
        </li>
      </ul>
    </div>

Penambahan CSS

Walaupun Bootstrap merupaka Framework CSS, terkadang satu saat kita perlu menambah CSS Custom untuk memoles. Simpan CSS ini di atas </head> di bawah JavaScript yang pertama.

 <style>
 .btn-bd-primary {
    --bd-violet-bg: #712cf9;
    --bd-violet-rgb: 112.520718, 44.062154, 249.437846;

    --bs-btn-font-weight: 600;
    --bs-btn-color: var(--bs-white);
    --bs-btn-bg: var(--bd-violet-bg);
    --bs-btn-border-color: var(--bd-violet-bg);
    --bs-btn-hover-color: var(--bs-white);
    --bs-btn-hover-bg: #6528e0;
    --bs-btn-hover-border-color: #6528e0;
    --bs-btn-focus-shadow-rgb: var(--bd-violet-rgb);
    --bs-btn-active-color: var(--bs-btn-hover-color);
    --bs-btn-active-bg: #5a23c8;
    --bs-btn-active-border-color: #5a23c8;
}
.bd-mode-toggle {
    z-index: 1500;
}
.bi {
    vertical-align: -.125em;
    fill: currentColor;
}
 </style>

Pemasangan Dark Mode Selesai, tetapi Blok biru tidak ikut menjadi Dark karena warna paten.

Demo Bootstrap Dark Mode

Apabila kita ingin tetap merubah Blok Biru di bagian header menjadi Gelap, silahkan tambahkan kode CSS seperti ini. Silahkan atur warnanya.

[data-bs-theme="dark"] header{background:#111 !important}

Maka hasilnya seperti pada demo.

Demo Coba Sendiri!

Penempatan Button Toggle Dark Mode

Untuk penempatan Button Dark Mode kita bisa sesuaikan pada bagian ini.

<div class="dropdown position-fixed bottom-0 end-0 mb-3 me-3 bd-mode-toggle">
Berlanjut ke Bagian 4 ....
#Bootstrap

Untuk mendapatkan update terbaru di Dasbor Blogger, silahkan ikuti Blog ini

4 komentar

1. Komentar ini, diurutkan dari yang terbaru
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image quote pre code
  1. kang, update lagi blog coretan kang Ismet dong kang...
    1. hehe siap mas.. kirain ga ada yang baca :)
  2. Ada adsense nya sekarang mas
    1. iya mas.. biar ga sepi hehehe
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