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Title Inappropriate Zoomed Text Visibility Check
id css_02
type true
elem all
test overflow
score 10
level AA
trust 1
ref 59br37
scs 1.4.4
dis 43353
result warning

Inappropriate Zoomed Text Visibility Check

Description

The "Inappropriate Zoomed Text Visibility Check" evaluates whether any elements using CSS overflow properties (e.g., hidden, scroll, auto) do not cause essential text to be clipped or hidden when the page is zoomed up to 200%.

Example outcome

I found 1 text node with a CSS overflow property that might prevent a user from seeing the text when the page is zoomed.

Impact

  • Visual Impairments: Visually impaired users often zoom pages to read text clearly. If overflow clips content, it may become unreadable.
  • Motor Impairments: Users with motor impairments, who cannot pan precisely with a mouse or touch, may miss content if it’s hidden off-screen.
  • Elderly: Elder people may have reduced contrast sensitivity and rely on magnification to interpret content.

Fixes

To address inappropriate text visibility on zoom:

  1. Avoid using overflow: hidden on containers with readable content, especially when widths/heights are fixed.
  2. Instead of clipping content, let it adapt or wrap.
  3. Allow content to grow as needed to accommodate zoom.

Resources