HTMLButtonElement: 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 HTMLButtonElement
interface returns a string representing a localized message that describes the validation constraints that the <button>
control does not satisfy (if any). This is the empty string if the control is not a candidate for constraint validation (the <button>
's type
is button
or reset
), or it satisfies its constraints.
If the <button>
is a candidate for constraint validation (the type
is set or defaults to submit
and HTMLButtonElement.willValidate
is true
) and the constraints are not met (there is a non-null ValidityState.customError
), the value is the error message that would be shown to the user during element validation.
Value
A string.
Specifications
Specification |
---|
HTML Standard # dom-cva-validationmessage-dev |
Browser compatibility
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