Paths/Frontend Engineer/Forms & Validation / Client-Side Validation
Write Error Messages People Can Use
An error message is a sentence about what to do next, tied to the field it belongs to. Write the strategy.
Validator
⏱ 0:00
IDLE — checks run live as you type commands; submit when done
01Requirements
live checks- File ~/app/forms/errors.md exists○
- The document states how a message is worded○
- The document states how errors are attached to their field and announced○
02Walkthrough
1 of 4 revealed- 01
Create the forms directory
The strategy lives with the form code.
mkdir -p ~/app/forms - 3 locked · each failed submit reveals one
03Stuck?
0 of 3 revealedTake a hint without losing the lab — each one points at the thing to look at, not at the answer.
04AI Tutor
guides, never solvesTell me what you're stuck on — I'll nudge, not solve. Which requirement are you looking at?
04Notebook
saved locally in this browserlearner@lab — ubuntu:24.04
Session is disposable
↑/↓ recalls commands · Ctrl+Enter submits · type help for the command list