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Hiding Content Responsibly

• Kitty Giraudel writes about the HTML attributes and CSS properties commonly used to ‘hide’ content, either visually or from assistive technologies (AT), or both. They then go into detail on each one:
  • An sr-only class is great for visually hiding something while preserving it for AT.
  • aria-hidden is great for hiding content from AT while keeping it visually displayed (e.g. decorative SVGs). However, make sure that there are no focusable elements within these areas, as they are still focusable.
  • display: none or the hidden attribute hide content from everyone, although their contents can still be referenced via aria-describedby/aria-labelledby, which could be handy to avoid vocalising something twice. Use this over width: 0 and height: 0.
  • visibility: hidden hides content visually and from AT (equivalent to display: none) but keeps the space, helping to avoid layout shift. Generally you’ll want to use this over opacity: 0 and clip-path: circle(0), which are inconsistently treated by AT, and over transform: scale(0), which has limited uses.
  • You’ll also want to use visibility: hidden over the Chrome-only content-visibility: hidden, which has low browser support.

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