Hidden until found
type: TechArticle
description: Use hidden="until-found" for collapsible content so that browser find-in-page, assistive tech, and search engines can still reach the text and auto-expand it.
language: en
is part of: Web Specification Studio
author: Web Specification Studio
publisher: Web Specification Studio
license: https://creativecommons.org/licenses/by/4.0/
date modified: 2026-05-31T17:50:00.000Z
citation: HTML Standard — The hidden attribute
  type: CreativeWork
  publisher: WHATWG
citation: CSS Containment Module Level 2 — Using content-visibility: hidden
  type: CreativeWork
  publisher: W3C
citation: MDN — hidden global attribute
  type: CreativeWork
  publisher: MDN
citation: Chrome for Developers — hidden=until-found and the beforematch event
  type: CreativeWork
  publisher: Google

Web Specification Studio
type: WebSite

Web Specification Studio
type: Organization

breadcrumb
type: BreadcrumbList
item list element: Home
  type: ListItem
  position: 1
  item: https://webspecification.com/
item list element: Spec
  type: ListItem
  position: 2
  item: https://webspecification.com/spec/
item list element: Accessibility
  type: ListItem
  position: 3
  item: https://webspecification.com/spec/accessibility/
item list element: Hidden until found
  type: ListItem
  position: 4
  item: https://webspecification.com/spec/accessibility/hidden-until-found/