web dev//frontend

The frontend is the part of a software system executed or rendered near the user. On the web it combines document structure, presentation, interaction, local state, and communication with APIs.

The frontend is the part of a software system executed or rendered near the user. On the web it combines document structure, presentation, interaction, local state, and communication with APIs.

The backend can control its machines. The frontend runs on somebody else's device, browser, network, font set, accessibility configuration, and battery. Variability is part of the platform.

Frameworks organize state and rendering, but they do not remove browser fundamentals. When the abstraction leaks, HTML, CSS, events, caching, and network timing are still the ground truth.

Client code is observable and modifiable by the user. Frontend validation improves experience; it is never the security boundary.

Frontend quality is mostly the behavior between screenshots: loading, interruption, resizing, stale state, keyboard use, and failure recovery.