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Test your knowledge: CSS Values and Units

Assess common value types, units, functions, and value resolution.

6 questions ~4 min Beginner

Knowledge check

Test your knowledge: CSS Values and Units

Assess common value types, units, functions, and value resolution.

Stuck? Each question has an optional hint.
Skip a hard question and review it before your results.
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Review

Which value is a length?

2rem is a length value using the rem unit.
What does a percentage usually need?

Percentage resolution depends on the property and its defined reference context.
Which is a CSS function notation?

calc() is a CSS function used to compute a value expression.
Which statement best describes computed versus used values?

CSS value processing includes specified, computed, used, and actual-value concepts.
What does `sibling-index()` return?

Values Level 5 defines `sibling-index()` as a 1-indexed integer indicating the element’s position among its inclusive siblings.
What does `sibling-count()` return?

The function returns the total number of child elements in the parent of the element where it is used.

Back to lesson Next: The Cascade, Specificity, Inheritance, and Defaulting