: The Web Component Slot element

The <slot> HTML 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.

Attributes

This element includes the global attributes.

name
- : The slot's name. When the slot's containing component gets rendered, the slot is rendered with the custom element's child that has a matching slot attribute. A named slot is a <slot> element with a name attribute. Unnamed slots have the name default to the empty string. Names should be unique per shadow root: if you have two slots with the same name, all of the elements with a matching slot attribute will be assigned to the first slot with that name.

Examples

html

<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>
      <span class="desc"><slot name="description">NEED DESCRIPTION</slot></span>
    </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 running live). In addition, you can find an explanation at Using templates and slots.

Technical summary

<table class="properties"> <tbody> <tr> <th scope="row"> <a href="/en-US/docs/Web/HTML/Guides/Content_categories" >Content categories</a > </th> <td> <a href="/en-US/docs/Web/HTML/Guides/Content_categories#flow_content" >Flow content</a >, <a href="/en-US/docs/Web/HTML/Guides/Content_categories#phrasing_content" >phrasing content</a > </td> </tr> <tr> <th scope="row">Permitted content</th> <td> <a href="/en-US/docs/Web/HTML/Guides/Content_categories#transparent_content_model" >Transparent</a > </td> </tr> <tr> <th scope="row">Events</th> <td>{{domxref("HTMLSlotElement/slotchange_event", "slotchange")}}</td> </tr> <tr> <th scope="row">Tag omission</th> <td>None, both the starting and ending tag are mandatory.</td> </tr> <tr> <th scope="row">Permitted parents</th> <td> Any element that accepts <a href="/en-US/docs/Web/HTML/Guides/Content_categories#phrasing_content" >phrasing content</a > </td> </tr> <tr> <th scope="row">Implicit ARIA role</th> <td> <a href="https://w3c.github.io/html-aria/#dfn-no-corresponding-role" >No corresponding role</a > </td> </tr> <tr> <th scope="row">Permitted ARIA roles</th> <td>No <code>role</code> permitted</td> </tr> <tr> <th scope="row">DOM interface</th> <td>{{domxref("HTMLSlotElement")}}</td> </tr> </tbody> </table>

Attributes

Examples

Technical summary

Specifications

Browser compatibility

See also