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GeezerVison is showing developer.mozilla.org — slot HTML global attribute - HTML | MDN

slot HTML global attribute

Baseline
Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

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The slot global attribute assigns a slot in a shadow DOM shadow tree to an element: An element with a slot attribute is assigned to the slot created by the <slot> element whose name attribute's value matches that slot attribute's value. You can have multiple elements assigned to the same slot by using the same slot name. Elements without a slot attribute are assigned to the unnamed slot, if one exists.

For examples, see our Using templates and slots guide.

Specifications

Specification
HTML
# attr-slot
DOM
# ref-for-dom-element-slot①

Browser compatibility

See also

  • HTML global attributes
  • HTML <slot> element
  • HTML <template> element
  • CSS ::slotted pseudo-element
  • CSS scoping module
  • Web components

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This page was last modified on Apr 17, 2026 by MDN contributors.

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