10.5. Ensure content remains readable even when text spacing properties are customized

On every web page, content must remain readable when text spacing properties are customized.

To ensure this rule is respected:

  • Do not define a fixed height (CSS height property) on elements likely to contain text, particularly form fields and card type component.
  • Be careful when using absolute positioning (CSS declaration: position: absolute;). Although this type of positioning is compatible with accessibility, it can cause content overlap in some cases.
  • Do not mark up text that is not a paragraph with <p> tags, such as tags, buttons, etc.

Tip

The free “Text Spacing” tool (add to your browser favorites) allows you to test whether this rule is being applied correctly.

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Updates

29 October 2025
Update the sheet to adapt to current development methods.

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