How to use keyframe animations in CSS

What to know about keyframe animations in CSS

Keyframes let you build reusable motion patterns like fades, slides, and pulsing indicators. This chapter explains the concept, demonstrates a practical example, and gives you a guided exercise.

How to use keyframe animations in CSS

Write a rule with a clear selector and declarations, then inspect the cascade in browser developer tools. Prefer reusable classes, responsive units, and visible focus styles.

Example: keyframe animations in CSS

Use this example as a starting point. Identify the part that controls the result, then adapt it to your own page or project.

@keyframes pulse { 0% { opacity: 0.4; } 100% { opacity: 1; } }

Common questions about keyframe animations

When should I use keyframe animations?

Use this technique when it expresses the structure, styling, or behavior your page needs. Keep the implementation focused and test it with the surrounding content.

What should I practice next?

Style a responsive card with readable type, consistent spacing, a clear focus state, and a layout that adapts to a narrow screen.