Web/API/HTMLSlotElement/assignedNodes

The assignedNodes() property of the HTMLSlotElement interface returns a sequence of the nodes assigned to this slot, and if the flatten option is set to true, the assigned nodes of any other slots that are descendants of this slot. If no assigned nodes are found, it returns the slot's fallback content.

Syntax

var assignedNodes = HTMLSlotElement.assignedNodes(options)

Parameters

options Optional: An object that sets options for the nodes to be returned. The available options are:

flatten

A Boolean indicating whether to return the assigned nodes of any available child <slot> elements (true) or not (false). Defaults to false.

Return value

An array of nodes.

Examples

The following snippet is taken from our slotchange example ([[../../../../../../../mdn.github.io/web-components-examples/slotchange/index|see it live also]]).

let slots = this.shadowRoot.querySelectorAll('slot');
slots[1].addEventListener('slotchange', function(e) {
  let nodes = slots[1].assignedNodes();
  console.log('Element in Slot "' + slots[1].name + '" changed to "' + nodes[0].outerHTML + '".');
});

Here we grab references to all the slots, then add a slotchange event listener to the 2nd slot in the template — which is the one that keeps having its contents changed in the example.

Every time the element inserted in the slot changes, we log a report to the console saying which slot has changed, and what the new node inside the slot is.

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'assignedNodes' in that specification.	Living Standard

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`assignedNodes` Experimental'	Chrome Full support 53	Edge Full support 79	Firefox Full support 63 Full support 63 No support 59 — 63 Disabled' Disabled' From version 59 until version 63 (exclusive): this feature is behind the `dom.webcomponents.shadowdom.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. No support ? — 59 Disabled' Disabled' Until version 59 (exclusive): this feature is behind the `dom.webcomponents.enabled` preference (needs to be set to `true`) and the `dom.webcomponents.shadowdom.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 40	Safari Full support 10.1	WebView Android Full support 53	Chrome Android Full support 53	Firefox Android Full support 63 Full support 63 No support 59 — 63 Disabled' Disabled' From version 59 until version 63 (exclusive): this feature is behind the `dom.webcomponents.shadowdom.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. No support ? — 59 Disabled' Disabled' Until version 59 (exclusive): this feature is behind the `dom.webcomponents.enabled` preference (needs to be set to `true`) and the `dom.webcomponents.shadowdom.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android Full support 41	Safari iOS Full support 10.3	Samsung Internet Android Full support 6.0

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.
User must explicitly enable this feature.': User must explicitly enable this feature.

HTMLSlotElement.assignedNodes() by Mozilla Contributors is licensed under CC-BY-SA 2.5.