The form
read-only property of the ElementInternals
interface returns the HTMLFormElement
associated with this element.
ElementInternals.form
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(); } connectedCallback() { console.log(this.#internals.form.length) } } window.customElements.define("custom-checkbox", CustomCheckbox);
Specifications
Specification |
---|
HTML Standard # dom-elementinternals-form |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
form |
77
|
79
|
98
95-98
|
No
|
64
|
No
|
77
|
77
|
98
|
55
|
No
|
12.0
|
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https://developer.mozilla.org/en-US/docs/Web/API/ElementInternals/form