Next.js TailwindCSS Dark Mode Tutorial

In this tutorial, we will learn how to implement a dark mode feature in a Next.js web application using TailwindCSS.

Prerequisites

• Basic understanding of HTML, CSS, and JavaScript
• Node.js and npm installed on your machine
• A basic understanding of Next.js and TailwindCSS

Step 1: Create a new Next.js app

First, we need to create a new Next.js app. You can do this using the following command:

    npx create-next-app my-app
  

Replace my-app with the name of your app.

Step 2: Install TailwindCSS

Next, we need to install TailwindCSS into our Next.js app. Run the following command to install TailwindCSS and its dependencies:

    npm install tailwindcss postcss autoprefixer
  

Next, we need to create a TailwindCSS configuration file. You can do this by running the following command:

    npx tailwindcss init -p
  

Step 3: Configure TailwindCSS

Open the tailwind.config.js file and add the following code to enable dark mode for TailwindCSS:

    
      module.exports = {
        darkMode: 'class',
        theme: {
          extend: {
            colors: {
              dark: '#333333',
            },
          },
        },
        variants: {
          extend: {
            backgroundColor: ['dark'],
            textColor: ['dark'],
          },
        },
        plugins: [],
      }
    
  

Step 4: Toggle dark mode

To toggle dark mode, we can use the class attribute. We need to add a class to our HTML elements and use JavaScript to toggle the dark mode class.

    
      // JavaScript
      const toggleDarkMode = () => {
        document.documentElement.classList.toggle('dark');
      }
    
  

Step 5: Test dark mode

Finally, we can test our dark mode feature by running our Next.js app and toggling the dark mode using the JavaScript function we created.