ElementInternals: willValidate property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2023.
The willValidate read-only property of the ElementInternals interface returns true if the element is a submittable element that is a candidate for constraint validation.
Elements that are barred from being candidates for constraint validation include those that have the attributes: disabled, hidden or readonly, input elements of type=button or type=reset, or any element that is a <datalist> element or has a <datalist> element ancestor.
Value
true if the element is a candidate for constraint validation, otherwise false.
Exceptions
NotSupportedErrorDOMException-
Thrown if the element does not have its
formAssociatedproperty set totrue.
Examples
The following example shows a custom checkbox component with formAssociated set to true, the value of willValidate is logged to the console.
class CustomCheckbox extends HTMLElement {
static formAssociated = true;
constructor() {
super();
this.internals_ = this.attachInternals();
}
// …
}
window.customElements.define("custom-checkbox", CustomCheckbox);
let element = document.getElementById("custom-checkbox");
console.log(element.internals_.willValidate); // true
Specifications
| Specification |
|---|
| HTML # dom-elementinternals-willvalidate |
Browser compatibility
Loading…