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Problem Being Solved
Users need to know how to correct form errors.
When to Use
- Validation should be used on all fields that require a value. Validation should also be used for fields that require data to be entered in a specific format (e.g., email address) when the input is not dictated by the control type.
- Note that the pattern consists of both field-level messaging and an error box at the top of the page with jumplinks to the field. This approach supports screenreaders.
When Not to Use
Validation is not necessary if a field is optional and doesn’t require a specific data format.
We use the jquery Validation plugin for front end validation, with some customizations for certain fields. See https://jqueryvalidation.org/