tailwind dark/light buttons

by Imri Paloja

HTML

<script src="https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4"></script>

    <style type="text/tailwindcss">

        /* enable dark mode */
        @custom-variant dark (&:where(.dark, .dark *));

        @theme {
            --color-eb-red: #e60000;
            --color-eb-dark: #1b1e1f;
            --color-eb-gray: #181a1b;

            --font-sans: 'Inter', sans-serif;
        }

        /* Optional: Additional custom utilities */
        @layer utilities {
            /*.text-gradient {*/
            /*    background-clip: text;*/
            /*    -webkit-background-clip: text;*/
            /*    color: transparent;*/
            /*}*/
        }
    </style>


<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css">
<link
  rel="stylesheet"
  href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.3.1/css/all.min.css">

  <button id="theme-toggle" type="button" class="text-gray-500 dark:text-gray-400 mt-4 mb-4 hover:bg-gray-100 dark:hover:bg-gray-700 focus:outline-none focus:ring-4 focus:ring-gray-200 dark:focus:ring-gray-700 rounded-lg text-sm p-2.5">
    <svg id="theme-toggle-dark-icon" class="hidden w-5 h-5" fill="currentColor" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M17.293 13.293A8 8 0 016.707 2.707a8.001 8.001 0 1010.586 10.586z"></path></svg>
    <svg id="theme-toggle-light-icon" class="hidden w-5 h-5" fill="currentColor" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M10 2a1 1 0 011 1v1a1 1 0 11-2 0V3a1 1 0 011-1zm4 8a4 4 0 11-8 0 4 4 0 018 0zm-.464 4.95l.707.707a1 1 0 001.414-1.414l-.707-.707a1 1 0 00-1.414 1.414zm2.12-10.607a1 1 0 010 1.414l-.706.707a1 1 0 11-1.414-1.414l.707-.707a1 1 0 011.414 0zM17 11a1 1 0 100-2h-1a1 1 0 100 2h1zm-7 4a1 1 0 011 1v1a1 1 0 11-2 0v-1a1 1 0 011-1zM5.05 6.464A1 1 0 106.465 5.05l-.708-.707a1 1 0 00-1.414 1.414l.707.707zm1.414 8.486l-.707.707a1 1 0 01-1.414-1.414l.707-.707a1 1 0 011.414...

CSS

@custom-variant dark (&:where(.dark, .dark *));

JavaScript

// On page load or when changing themes, best to add inline in `head` to avoid FOUC
if (
  localStorage.getItem('color-theme') === 'dark' ||
  (!('color-theme' in localStorage) &&
    window.matchMedia('(prefers-color-scheme: dark)').matches)
) {
  document.documentElement.classList.add('dark')
} else {
  document.documentElement.classList.remove('dark')
}


var themeToggleDarkIcon = document.getElementById('theme-toggle-dark-icon');
var themeToggleLightIcon = document.getElementById('theme-toggle-light-icon');

// Change the icons inside the button based on previous settings
if (localStorage.getItem('color-theme') === 'dark' || (!('color-theme' in localStorage) && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
    themeToggleLightIcon.classList.remove('hidden');
} else {
    themeToggleDarkIcon.classList.remove('hidden');
}

var themeToggleBtn = document.getElementById('theme-toggle');

themeToggleBtn.addEventListener('click', function() {

    // toggle icons inside button
    themeToggleDarkIcon.classList.toggle('hidden');
    themeToggleLightIcon.classList.toggle('hidden');

    // if set via local storage previously
    if (localStorage.getItem('color-theme')) {
        if (localStorage.getItem('color-theme') === 'light') {
            document.documentElement.classList.add('dark');
            localStorage.setItem('color-theme', 'dark');
        } else {
            document.documentElement.classList.remove('dark');
            localStorage.setItem('color-theme', 'light');
        }

    // if NOT set via local storage previously
    } else {
        if (document.documentElement.classList.contains('dark')) {
            document.documentElement.classList.remove('dark');
            localStorage.setItem('color-theme', 'light');
        } else {
            document.documentElement.classList.add('dark');
            localStorage.setItem('color-theme', 'dark');
        }
    }
    
});