React Dark Mode Switch with CSS

Dark mode has become increasingly popular in recent years, and it's not hard to see why. With its sleek, modern aesthetic and potential health benefits for our eyes, it's no wonder that many websites are adopting this feature. In this blog post, we will explore how to implement dark mode in a React application using Tailwind CSS.

To start, we'll create a function called `themed` that will receive a color key as an argument and will return the color value for the current theme. This function will allow us to dynamically switch between light and dark modes.

Next, we'll create a mixin called `themify` to generate the dark and light themes. The file will consist of two objects named `light` and `dark`, where each theme will have the same key with different color options. For example, if we define a key called `primary-color`, the `light` object might return a bright blue, while the `dark` object returns a deep navy.

We'll also create a state variable to track our current theme, which we can use to dynamically update our UI components. This will allow us to easily switch between light and dark modes without having to re-render the entire application.

To implement this functionality in our React component, we'll use the `useState` hook to initialize our theme with the default value of `'light'`. We'll then use the `useEffect` hook to check if there is a saved theme in local storage. If not, we'll set it to `'light'`.

Now that we have our themes defined and our state variable initialized, let's create a toggle button to allow users to switch between light and dark modes. This will be done using CSS variables and React.

Here's the complete code for our theme switcher:

```css

// theme-variables.scss

$primary-color-light: #007bff;

$primary-color-dark: #2196f3;

.theme-light {

--primary-color: #007bff;

}

.theme-dark {

--primary-color: #2196f3;

}

```

```jsx

import React, { useState, useEffect } from 'react';

function useDarkMode() {

const 'theme, setTheme' = useState('light');

const componentMounted = useRef(false);

useEffect(() => {

if (!componentMounted.current) {

componentMounted.current = true;

} else {

localStorage.setItem('theme', theme);

}

}, 'theme');

return { theme, setTheme };

}

function App() {

const { theme, setTheme } = useDarkMode();

const toggleTheme = () => {

setTheme(theme === 'light' ? 'dark' : 'light');

};

return (

className={`theme-${theme}`}

style={{

fontFamily: 'BlinkMacSystemFont, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif',

}}

);

}

export default App;

```

With this code, we can now switch between light and dark modes using a toggle button. The `useEffect` hook ensures that our theme is saved to local storage whenever it changes.

In conclusion, implementing dark mode in a React application using Tailwind CSS is a relatively simple process that requires defining our themes, creating a state variable to track our current theme, and implementing a toggle button to switch between light and dark modes. With this tutorial, you should now be able to create your own dark mode switcher for your React application.

Why I Like Dark Mode

I'm a big fan of dark mode. Not only does it look sleek and modern, but it also makes web pages easier for me to read and helps my eyes feel more relaxed. Many websites have implemented dark mode already, including YouTube and Twitter, and I think we'll see it become even more popular in the future.

I like when websites have a dark mode option because it gives me the choice to customize my browsing experience. If you're like me and appreciate dark mode, then implementing this feature in your React application is definitely worth considering.

In this blog post, we explored how to implement dark mode in a React application using Tailwind CSS. We created a function called `themed` to dynamically switch between light and dark modes, and implemented a mixin called `themify` to generate the themes. We also used the `useState` hook to initialize our theme with the default value of `'light'`, and the `useEffect` hook to check if there is a saved theme in local storage.

With this tutorial, you should now be able to create your own dark mode switcher for your React application. Whether you're building a personal project or working on a commercial website, implementing dark mode can be a great way to enhance the user experience and make your app more visually appealing.

React dark mode switch with css