Writing well-structured code that is easy to maintain and understand. 

Optimizing code for performance, ensuring fast loading times and smooth user experiences.

Ensuring that the applications work consistently across different web browsers and devices. Also, test and debug code to address any compatibility issues that may arise.

Building applications that adapt and work well across different devices and screen sizes.

Ensuring that the websites and applications are responsive.

Providing pre-built components and efficient ways to manage the state of an application.

Creating a positive user experience by ensuring intuitive and user-friendly interfaces. Also, consider factors such as accessibility and interactivity to enhance user experience.