How different layers of frontend and backend interact

GREENFIELD LOCAL HUB Digital Product Design & Development Year 13 OSP DPDD Architecture: HTML/CSS/JS served by Flask + MySQL Stack: Python · Flask · Jinja2 · MySQL · HTML · CSS · JavaScript 1. System Design 1.1 Architecture The system follows a simplified three-tier architecture where Flask serves both the frontend and backend logic. HTML, CSS and JavaScript files are rendered using Jinja2 templates. User interactions trigger HTTP requests to Flask routes, which validate input, interact with