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.
| Specification |
|---|
| HTML Standard # dom-cva-validationmessage-dev |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
validationMessage |
10 | 12 | 4 | 10 | ≤12.1 | 5.1 | ≤37 | 18 | 4 | ≤12.1 | 5 | 1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/HTMLObjectElement/validationMessage