HTMLFieldSetElement: validity 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 validity read-only property of the HTMLFieldSetElement interface returns a ValidityState object that represents the validity states this element is in. Although <fieldset> elements are never candidates for constraint validation, the validity state may still be invalid if a custom validity message has been set.

Note: The :valid and :invalid CSS pseudo-classes are applied to <fieldset> elements based on the validity of its descendant form controls, not the fieldset itself.

Value

A ValidityState object.

Examples

The following example demonstrates that a <fieldset> is in an invalid state when a customError is set; in this state, checkValidity() returns true while the validityState's validity property is false.

js
const fieldSet = document.getElementById("myFieldSet");
fieldSet.setCustomValidity("This fieldset is invalid.");
const validityState = fieldSet.validity;
console.log(validityState.valid); // false
console.log(validityState.customError); // true
console.log(fieldSet.checkValidity()); // true

Note: The :valid and :invalid CSS pseudo-classes are applied to <fieldset> elements based on the validity of its descendant form controls, not the fieldset itself.

Specifications

Specification
HTML
# the-constraint-validation-api:dom-cva-validity

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
validity

Legend

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Full support
Full support

See also