A simple and reusable dark mode toggle switch using Bootstrap 5 for your website.

This project integrates a dark mode switch into your website, allowing users to toggle between dark and light themes. It uses Bootstrap 5 for styling and JavaScript for functionality, with the state of the theme being persisted in local storage so that the user's preference is maintained across sessions.

• Easy to integrate with existing Bootstrap projects
• Uses local storage to remember the user's theme preference
• Automatically applies the user's preferred theme on page load

To use this switch in your project, follow these steps:

1. Make sure Bootstrap 5 is included in your project:

<!-- Bootstrap CSS -->
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet">

<!-- Bootstrap Bundle JS (includes Popper) -->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"></script>

2. Include the HTML for the switch in your webpage:

<!-- Bootstrap 5 switch -->
<div class="form-check form-switch">
    <input class="form-check-input" type="checkbox" id="darkModeSwitch" checked>
    <label class="form-check-label" for="darkModeSwitch">Dark Mode</label>
</div>

3. Add the JavaScript code to handle the switch behavior:

document.addEventListener('DOMContentLoaded', (event) => {
    const htmlElement = document.documentElement;
    const switchElement = document.getElementById('darkModeSwitch');

    // Set the default theme to dark if no setting is found in local storage
    const currentTheme = localStorage.getItem('bsTheme') || 'dark';
    htmlElement.setAttribute('data-bs-theme', currentTheme);
    switchElement.checked = currentTheme === 'dark';

    switchElement.addEventListener('change', function () {
        if (this.checked) {
            htmlElement.setAttribute('data-bs-theme', 'dark');
            localStorage.setItem('bsTheme', 'dark');
        } else {
            htmlElement.setAttribute('data-bs-theme', 'light');
            localStorage.setItem('bsTheme', 'light');
        }
    });
});

4. (Optional) Customize the switch's appearance using Bootstrap's form-check classes or your own CSS.

You can easily customize the look and feel of the dark mode switch to match your website's branding. Use Bootstrap's utility classes or your own CSS to create a unique user experience.

Feel free to fork the project and submit pull requests. You can improve the script, add new features, or propose improvements to the documentation.

This project is open-source and available under the MIT License.