One of the first and most critical decisions in frontend design is deciding where and when your HTML is generated. Choosing the wrong strategy can cripple your SEO or ruin your user experience. Client-Side Rendering (CSR)

Blazing fast delivery via CDNs, but not ideal for highly dynamic, user-specific data. 3. State Management: Architectural Truths

Let’s break down a practical, scalable frontend architecture using a real-world example:

Always sanitize user input. Use modern frameworks that auto-escape strings, and enforce a strict Content Security Policy (CSP) header to restrict where scripts can be executed from.

The server sends a bare-minimum HTML file and a large JavaScript bundle. The browser executes the JS to build the DOM. Best for rich, authenticated dashboards where SEO is irrelevant.

Whether you are preparing for a "Big Tech" interview or refactoring a legacy enterprise app, remember: