Web/API/Element/slot

The slot property of the Element interface returns the name of the shadow DOM slot the element is inserted in.

A slot is a placeholder inside a web component that users can fill with their own markup (see Using templates and slots for more information).

Syntax

var aString = element.slot
element.slot = aString

Value

A DOMString.

Examples

In our simple-template example ([[../../../../../../../mdn.github.io/web-components-examples/simple-template/index|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 name of the corresponding <slot> element.

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

Specifications

Specification	Status	Comment
DOMThe definition of 'slot' 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
`slot`	Chrome Full support 53	Edge Full support 79	Firefox Full support 63	IE No support No	Opera Full support Yes	Safari Full support 10	WebView Android Full support 53	Chrome Android Full support 53	Firefox Android Full support 63	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support 6.0

Legend

Full support: Full support
No support: No support

Element.slot by Mozilla Contributors is licensed under CC-BY-SA 2.5.