ElementInternals: form property
Baseline 2023Newly available
Since March 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.
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
.
html
<form id="myForm">
<custom-checkbox id="custom-checkbox"></custom-checkbox>
<custom-label for="custom-checkbox">Join newsletter</custom-label>
</form>
js
class CustomCheckbox extends HTMLElement {
static formAssociated = true;
#internals;
constructor() {
super();
this.#internals = this.attachInternals();
}
connectedCallback() {
console.log(this.#internals.form.length);
}
}
window.customElements.define("custom-checkbox", CustomCheckbox);
Specifications
Specification |
---|
HTML # dom-elementinternals-form |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
form |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.