Front End vs Back End
In one sentenceThe front end is what users see and click in the browser; the back end is the server, database and logic behind it.
What it means
Front end: HTML, CSS, JavaScript, the screens. Back end: the server, the Database, logins, payments, emails, API calls. "Full stack" means both.
How to use it
- Secrets like API keys must live in the back end, never in front-end code that every visitor can read.
- When describing an app to AI, describe both: what people see, and what has to happen behind the scenes.
Related terms
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