Slotable.assignedSlot

The assignedSlot read-only property of the Slotable interface returns an HTMLSlotElement representing the <slot> element the node is inserted in.

Syntax

var slotElement = elementInstance.assignedSlot

Value

An HTMLSlotElement instance, or null if the element is not assigned to a slot, or if the associated shadow root was attached with its mode set to closed (see Element.attachShadow for further details).

Examples

In our simple-template example (see it live), we create a trivial custom element example called <my-paragraph> in which a shadow root is attached and then populated using the contents of a template that contains a slot named my-text.

When <my-paragraph> is used in the document, the slot is populated by a slotable element by including it inside the element with a slot attribute with the value my-text. Here is one such example:

<my-paragraph>
  <span slot="my-text">Let's have some different text!</span>
</my-paragraph>

In our JavaScript file we get a reference to the <span> shown above, then log a reference to the original <slot> element the <span> was inserted in.

let slottedSpan = document.querySelector('my-paragraph span')
console.log(slottedSpan.assignedSlot); // logs '<slot name="my-text">'

Specifications

Specification Status Comment
Unknown
The definition of 'assignedSlot' in that specification.
Unknown Initial definition.

Browser Compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 53.0 (Yes) No support (Yes) No support
Feature Android Android Webview Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support No support 53.0 (Yes) No support (Yes) No support 53.0

 

Document Tags and Contributors

 Contributors to this page: chrisdavidmills
 Last updated by: chrisdavidmills,