This article covers field validators as a way of getting early user feedback. This is part of the UI Library.
The UI Library is a mixed bag of Javascript extensions for programming UI controls in USoft web pages. Do not confuse with the structured UDB object model for data exchange between USoft web pages and a Rules Engine.
Field validation is attractive for for early user feedback. USoft has field validation built in by default. An adjusted version of the jQuery validator plug-in is incorporated (jquery.validate.js) to facilitate this. The plug-in comes with a default set of validators. The entire control is well documented at http://jqueryvalidation.org/documentation/.
USoft provides an additional set of validators that can be found in the usoft.ui.validator.js file:
| Validator | Explanation |
|---|---|
| pattern | Allows a field value to be validated against a regular expression. |
| biccode | Checks that the field value is a valid BIC code. |
| iban | Checks that the field value is a valid IBAN code. |
| udb-mandatory | Checks that the field value meets the Mandatory check defined at domain level. |
| udb-numeric | Checks that the field value meets the number format check defined at domain level. |
| udb-ioformat | Checks that the field value meets the IO Format check defined at domain level. |
| udb-value-list | Check that the field value is one of the allowed values defined for the domain. |
- If a field value is validated as being correct, the value 'valid' is added to its class list.
- If a field value is validated as being incorrect, the value 'error' is added to its class list.
- If one of the domain checks is violated, the value 'domain-error' is added to the class list.
Additionally, an error message is displayed as visual feedback to the user, where applicable.
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