HTMLOutputElement: validationMessage property

{{APIRef("HTML DOM")}}

The validationMessage read-only property of the {{domxref("HTMLOutputElement")}} interface returns a string representing a localized message that describes the validation constraints that the {{htmlelement("output")}} control does not satisfy (if any). This is the empty string as <output> elements are not candidates for constraint validation ({{domxref("HTMLOutputElement.willValidate")}} is false).

Value

The empty string, "";

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{HTMLelement("output")}}
• {{domxref("HTMLOutputElement")}}
• {{domxref("HTMLOutputElement.willValidate")}}
• {{domxref("HTMLOutputElement.validity")}}
• {{domxref("HTMLOutputElement.checkValidity()")}}
• {{domxref("HTMLOutputElement.reportValidity()")}}
• {{domxref("HTMLOutputElement.setCustomValidity()")}}
• Learn: Client-side form validation
• Guide: Constraint validation
• CSS {{cssxref(":valid")}} and {{cssxref(":invalid")}} pseudo-classes