The setCustomValidity() method of the
HTMLObjectElement interface sets a custom validity message for the
element.
Syntax
HTMLObjectElement.setCustomValidity(message);Parameters
- error
- The message to use for validity errors.
Return value
Exceptions
None.
Examples
In this example, we pass the ID of an input element, and set different error messages depending on whether the value is missing, too low or too high. Additionally you must call the reportValidity method on the same element or nothing will happen.
function validate(inputID)
{
var input = document.getElementById(inputID);
var validityState_object = input.validity;
if (validityState_object.valueMissing)
{
input.setCustomValidity('You gotta fill this out, yo!');
input.reportValidity();
}
else if (validityState_object.rangeUnderflow)
{
input.setCustomValidity('We need a higher number!');
input.reportValidity();
}
else if (validityState_object.rangeOverflow)
{
input.setCustomValidity('Thats too high!');
input.reportValidity();
}
else
{
input.setCustomValidity('');
input.reportValidity();
}
}It's vital to set the message to an empty string if there are no errors. As long as the error message is not null, the form will not pass validation and will not be submitted.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Unknown The definition of 'setCustomValidity' in that specification. |
Living Standard | Initial definition. |
Browser compatibility
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