To ensure accessibility, follow Web Content Accessibility Guidelines (WCAG), use semantic HTML, and test your app with assistive technologies.

Ensuring your web app is accessible to all users, including those with disabilities, is crucial for providing an inclusive experience. Start by following the Web Content Accessibility Guidelines (WCAG), which outline best practices for making content more accessible. Familiarize yourself with the four principles of accessibility: perceivable, operable, understandable, and robust (POUR). These principles guide you in creating an inclusive interface. Use semantic HTML to improve accessibility. Elements like headings, lists, and landmarks provide structure and context for assistive technologies, such as screen readers. Properly use ARIA (Accessible Rich Internet Applications) attributes to enhance accessibility for complex user interfaces. However, use ARIA sparingly, as semantic HTML should always be the first choice for improving accessibility. Ensure your app is navigable by keyboard, allowing users who cannot use a mouse to access all features. Test keyboard navigation thoroughly, checking for focus states and logical tab orders. Another crucial aspect of accessibility is color contrast. Ensure that text has sufficient contrast against its background to make it readable for users with visual impairments. Use tools like WebAIM's Contrast Checker to assess color combinations. Testing your app with assistive technologies is essential. Conduct user testing with individuals who have disabilities to gather valuable feedback on your app's accessibility. Tools like Lighthouse and Axe can also help identify accessibility issues automatically. By following these practices, you can create a web app that is accessible to all users, fostering an inclusive digital environment.