Using Headless UI in React

1. Introduction

Headless UI is a library that provides unstyled, fully accessible UI components designed to integrate seamlessly with any styling solution.

This lesson covers how to effectively use Headless UI in a React application, focusing on building accessible and customizable components without sacrificing functionality.

2. Installation

To install Headless UI, you can use npm or yarn. Run the following command:

npm install @headlessui/react

yarn add @headlessui/react

3. Components

Headless UI provides various components, including:

• Combobox
• Listbox
• Menu
• Modal
• Popover
• Switch

Example: Using the Combobox

Here's how to implement a Combobox using Headless UI:

import { Combobox } from '@headlessui/react';
import { useState } from 'react';

function MyCombobox() {
    const [selected, setSelected] = useState('');
    const [query, setQuery] = useState('');

    const items = ['Apple', 'Banana', 'Cherry', 'Date', 'Elderberry'];

    const filteredItems =
        query === ''
            ? items
            : items.filter(item => item.toLowerCase().includes(query.toLowerCase()));

    return (
        
             setQuery(event.target.value)} />
            
                {filteredItems.map(item => (
                    
                        {item}
                    
                ))}
            
        
    );
}

4. Best Practices

When using Headless UI, consider the following best practices:

1. Ensure accessibility: Always use the components as intended to maintain accessibility.
2. Customize styles: Use CSS modules or styled-components to style your components without altering functionality.
3. Test components: Regularly test components to ensure they behave as expected.

5. FAQ