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This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The validationMessage read-only property of the HTMLObjectElement interface returns a string representing a localized message that describes the validation constraints that the control does not satisfy (if any). This is the empty string if the control is not a candidate for constraint validation (willValidate is false), or it satisfies its constraints.
A string.
| HTML # dom-cva-validationmessage-dev |
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This page was last modified on Apr 7, 2023 by MDN contributors.
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