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I have a Webform with a custom composite, and there I have a element which type is Number and i want to validate this element.

If I check required when the field is empty it show a message that the field is required, but if I put letters in the field show the same message when it should be that the field is not valid because it has letters.

I know how to do this with a textfield element but this element is not inside the custom composite with a regular expression . And even if i change the custom composite element from Number to Textfield I can not do it this, can not be validated individually.

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Instead of putting validations just create a number type field. And inside the number field of the custom composite element, you can not enter the letters, only numbers can be entered so no concept/need for validating against letters.

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