Web/HTML/Element/slot

The HTML <slot> element—part of the Web Components technology suite—is a placeholder inside a web component that you can fill with your own markup, which lets you create separate DOM trees and present them together.

Content categories	Flow content, phrasing content
Permitted content	Transparent
Events	`slotchange`
Tag omission	None, both the starting and ending tag are mandatory.
Permitted parents	Any element that accepts phrasing content
Implicit ARIA role	No corresponding role
Permitted ARIA roles	No `role` permitted
DOM interface	`HTMLSlotElement`

Attributes

This element includes the global attributes.

name: The slot's name.; A named slot is a <slot> element with a name attribute.

Examples

<template id="element-details-template">
  <style>
    details {font-family: "Open Sans Light", Helvetica, Arial, sans-serif }
    .name {font-weight: bold; color: #217ac0; font-size: 120% }
    h4 {
      margin: 10px 0 -8px 0;
      background: #217ac0; 
      color: white;
      padding: 2px 6px;
      border: 1px solid #cee9f9; 
      border-radius: 4px;
    }
    .attributes { margin-left: 22px; font-size: 90% }
    .attributes p { margin-left: 16px; font-style: italic }
  </style>
  <details>
    <summary>
      <code class="name">&lt;<slot name="element-name">NEED NAME</slot>&gt;</code>
      <i class="desc"><slot name="description">NEED DESCRIPTION</slot></i>
    </summary>
    <div class="attributes">
      <h4>Attributes</h4>
      <slot name="attributes"><p>None</p></slot>
    </div>
  </details>
  <hr>
</template>

Note: You can see this complete example in action at element-details (see it [[../../../../../../../mdn.github.io/web-components-examples/element-details/index|running live]]). In addition, you can find an explanation at Using templates and slots.

Specifications

Specification	Status	Comments
HTML Living StandardThe definition of '<slot>' in that specification.	Living Standard
DOMThe definition of 'Slots' 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 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	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	Samsung Internet Android Full support 6.0
`name`	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	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	Samsung Internet Android Full support 6.0

Legend

Full support: Full support
No support: No support
User must explicitly enable this feature.': User must explicitly enable this feature.

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