Error Prevention
Nielsen Heuristic 5 — Error Prevention: Even better than good error messages is a careful design which prevents a problem from occurring in the first place.…
$ aoe install @community/fact-error-preventionProjection
Always in _index.xml · the agent never has to ask for this.
ErrorPrevention [fact] v1.0.0
Nielsen Heuristic 5 — Error Prevention: Even better than good error messages is a careful design which prevents a problem from occurring in the first place. Either eliminate error-prone conditions or check for them and present users with a confirmation option before they commit to the action.
Loaded when retrieval picks the atom as adjacent / supporting.
ErrorPrevention [fact] v1.0.0
Nielsen Heuristic 5 — Error Prevention: Even better than good error messages is a careful design which prevents a problem from occurring in the first place. Either eliminate error-prone conditions or check for them and present users with a confirmation option before they commit to the action.
Confidence
proven
Evidence
@nielsen/source-nielsen-1994
Meta
- License: Apache-2.0
- License Provenance: package-authorship-claim
Heuristic Number
5
Violations
- Destructive action (delete, archive) placed adjacent to common non-destructive actions without visual separation.
- Submit button active even when required fields are empty — error only revealed after submit.
- No warning before navigating away from an unsaved form.
Loaded when retrieval picks the atom as a focal / direct hit.
ErrorPrevention [fact] v1.0.0
Nielsen Heuristic 5 — Error Prevention: Even better than good error messages is a careful design which prevents a problem from occurring in the first place. Either eliminate error-prone conditions or check for them and present users with a confirmation option before they commit to the action.
Confidence
proven
Evidence
@nielsen/source-nielsen-1994
Meta
- License: Apache-2.0
- License Provenance: package-authorship-claim
Heuristic Number
5
Violations
- Destructive action (delete, archive) placed adjacent to common non-destructive actions without visual separation.
- Submit button active even when required fields are empty — error only revealed after submit.
- No warning before navigating away from an unsaved form.
Examples
- Disabling the submit button until required form fields pass inline validation.
- 'Are you sure?' confirmation dialog before deleting data that cannot be recovered.
- Date picker widget that prevents selecting past dates for future-only bookings.
- Autocorrect and spellcheck that catch typos before form submission.
Relations
related: [@nielsen/taxonomy-10-heuristics]
Confidence
proven
Evidence
@nielsen/source-nielsen-1994
Meta
- License: Apache-2.0
- License Provenance: package-authorship-claim
Heuristic Number
5
Violations
- Destructive action (delete, archive) placed adjacent to common non-destructive actions without visual separation.
- Submit button active even when required fields are empty — error only revealed after submit.
- No warning before navigating away from an unsaved form.
Supplies To
Source
aoe-engine/examples/frontend-design/primes/compiled/@community/fact-error-prevention/atom.yaml