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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).


var aString = element.slot
element.slot = aString


A DOMString.


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:

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

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'


Specification Status Comment
The definition of 'slot' in that specification.
Living Standard  

Browser Compatibility

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

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 Colaboradores en esta página: chrisdavidmills, DomenicDenicola, TJNK, valtlai, ThatGlennD, jpmedley
 Última actualización por: chrisdavidmills,