HTMLOutputElement: validationMessage property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since December 2018.
The validationMessage read-only property of the HTMLOutputElement interface returns a string representing a localized message that describes the validation constraints that the <output> control does not satisfy (if any). This is the empty string as <output> elements are not candidates for constraint validation (HTMLOutputElement.willValidate is false).
Value
The empty string, "";
Specifications
| Specification |
|---|
| HTML Standard # dom-cva-validationmessage-dev |
Browser compatibility
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