Frontend
You might say
People keep talking about the frontend and backend. What's the difference?
The layer people directly see, click, and type intoOn a sign-up page, the fields, submit button, and pending, success, or error messages belong to the frontend; whether the account was actually created must come from the backend result.
Which parts handle one save?
Highlighted steps show what this term is responsible for in the flow.
API
/api/profileURL · method · body
—
responsestatus · body
Waiting for request
- ·Signed-in user?
- ·Name length OK?
- ·Allowed to update?
- ·Write only after checks
profilestable
| id | name | updated |
|---|---|---|
| 7 | Momo | yesterday |
1 / 6Edit and saveFocus
FrontendRead the input and show a pending state
Quick checkChoose the best answer
The page says Saved, but the old value returns after refresh. What should you check first?
You can say this to an AI Agent
The page says Saved, but the value disappears after refresh. Check whether the frontend reports success too early and whether it handles the save request and refresh read correctly. Fix the cause, then save and refresh again to verify it.
Recommended tool
Web fine-tuning tool · Selector Pro
Select page elements for precise AI edits
Click a button, text, or card, note the change, then copy its exact location to AI.
Open Selector Pro website↗Further reading