ElementInternals.form
The form
read-only property of the ElementInternals
interface returns the HTMLFormElement
associated with this element.
Value
An HTMLFormElement
.
Examples
The following example shows a custom checkbox component inside a form with an ID of myForm
.
Printing form.length
to the console, gives us the value of HTMLFormElement.length
.
<form id="myForm"><custom-checkbox id="custom-checkbox"></custom-checkbox>
<custom-label for="custom-checkbox">Join newsletter</custom-label></form>
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_.form.length);
Specifications
Specification |
---|
HTML Standard # dom-elementinternals-form |
Browser compatibility
BCD tables only load in the browser