Enhancements in React.js Codebase 🚀

[sanjaiyan-dev]

Hi,

This pull request contains very small improvements to the React.js code, which include:

1. Using useMemo instead of useEffect.
2. Adding asynchronous decoding for image elements.
3. Hoisting certain CSS styles that prevent the re-creation of objects in each re-render.

Actually, there is more room for optimization, which includes adding memoization using useCallback or useMemo, etc.

I apologize if I made any mistakes. ::(