Frontend

Provide styling content without embedding it within the TSX in the frontend, use external links for styles.
Online banking theming to be followed for colors, backgrounds, padding, and strokes.
Proper error handling using try-except blocks in Python and error boundaries in React.
If you are using `innerHTML` in a Jinja2 template, replace it with `innerText` so that your application is not prone to XSS attacks.
Never display user input data using `dangerouslySetInnerHTML` without sanitizing it first with a library like DOMPurify.
Leverage established libraries and frameworks so that reinvention is minimal; ensure that all the dependencies are kept up to date regularly.