CSS modern behavior decisions quiz

Check the fallback, scope, and interaction consequences of newer CSS behavior. Each question has one answer and an explanation.

Review the decisions

• CSS container query units: size type to its component
• CSS @starting-style: define an element's entry state
• CSS anchor positioning: place a hint beside its control
• CSS view timelines: tie optional motion to visible progress

Other checks

• CSS Quizzes
• CSS rendering and input decisions quiz

Common Mistakes

• Do not treat optional animation as required information.
• Do not assume unsupported features make the fallback disappear.