Applicability
CSS
This technique relates to:
- Success Criterion 1.4.4: Resize text (Sufficient as a way to meet an unwritten technique)
- Success Criterion 1.4.5: Images of Text (Advisory)
- Success Criterion 1.4.8: Visual Presentation (Sufficient as a way to meet G146: Using liquid layout)
- Success Criterion 1.4.9: Images of Text (No Exception) (Advisory)
Description
The objective of this technique is to specify text font size proportionally so that
user agents can scale content effectively. If a font-size is specified for the body element, all other elements inherit that value, unless overridden by a more specific
selector.
Examples
Example 1: Percent font sizes in CSS
This example defines the font size for the strong element so that its text will always be larger than the surrounding text, in whatever
context it is used. Assuming that headings and paragraphs use different font sizes,
the emphasized words in this example will each be larger than their surrounding text.
strong {font-size: 120%}
...
<h1>Letting the <strong>user</strong> control text size</h1>
<p>Since only the user can know what size text works for him,
it is <strong>very</strong> important to let him configure the text size.
…Resources
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Tests
Procedure
- Check that the value of the CSS property that defines the font size is a percentage.
Expected Results
- Check #1 is true