When designing web forms validation, there are a couple of things that you should remember:
- Try to be simple. This includes the layout and generic design style.
- Keep elements aligned.
- Display validation results as soon as possible (but not too soon, for instance let the user finish the entry if it is not obvious that he is making a mistake).
- Be consistent (naming) and coherent.
- Avoid "wizards" style when possible.
- Try to activate the submit button only when all required fields are filled in correctly.
- Never redisplay the form emptied when there is an error after the submit. Always keep what the user entered.
Nice to have:
- Auto-completion of the fields
- Reset button
Resources : article from
ZDNet, and
A List Apart
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