To create a dark mode toggle button with Vue.js and Tailwind CSS, follow these steps:

  1. Set Up Vue.js Project: Make sure you have Vue.js installed in your project. If you haven't already set up a Vue.js project, you can use Vue CLI to create one:

    # Install Vue CLI globally (if you haven't already) npm install -g @vue/cli # Create a new Vue project vue create my-app
  2. Install Tailwind CSS: Install Tailwind CSS and its dependencies in your project:

    cd my-app # Install Tailwind CSS and postcss dependencies npm install tailwindcss postcss autoprefixer
  3. Configure Tailwind CSS: Create a tailwind.config.js file in your project's root directory to configure Tailwind CSS:

    // tailwind.config.js module.exports = { purge: [], darkMode: 'class', // Enable dark mode based on class theme: { extend: {}, }, variants: {}, plugins: [], };
  4. Set Up Dark Mode Classes: Define dark mode classes in your App.vue file. We'll use the dark class to toggle dark mode:

    <!-- App.vue --> <template> <div :class="{'dark': isDarkMode}"> <!-- Your app content here --> <button @click="toggleDarkMode" class="fixed bottom-4 right-4 p-2 rounded-full bg-gray-300 dark:bg-gray-700"> {{ isDarkMode ? 'Light Mode' : 'Dark Mode' }} </button> </div> </template> <script> export default { data() { return { isDarkMode: false, }; }, methods: { toggleDarkMode() { this.isDarkMode = !this.isDarkMode; document.documentElement.classList.toggle('dark'); }, }, }; </script>
  5. Add Tailwind CSS to the Project: Import Tailwind CSS in your project's main entry file (e.g., main.js):

    // main.js import Vue from 'vue'; import App from './App.vue'; import './assets/css/tailwind.css'; // Add this line to import Tailwind CSS Vue.config.productionTip = false; new Vue({ render: (h) => h(App), }).$mount('#app');
  6. Toggle the Dark Mode: With the provided setup, the dark mode toggle button should work. Clicking the button will toggle the isDarkMode data property, and the dark class will be applied to the root div element, enabling dark mode when the class is present.

  7. Customize Dark Mode Styling: If you want to customize the styles for dark mode, you can use the dark class in your CSS or add additional dark mode-specific styles in your tailwind.config.js file.

By following these steps, you'll have a working dark mode toggle button for your Vue.js application using Tailwind CSS. The button will allow users to switch between dark and light mode dynamically.

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