CSS Academy · Lesson

Animating clip-path Shapes

Create dramatic reveal animations by transitioning between clip-path polygon values.

Lesson 3 of 412 steps

Animating clip-path Shapes is a free CSS Academy lesson on CoddyKit. This is lesson 3 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the CSS Academy learning path, and your progress syncs across the web and the CoddyKit app. The CSS Academy course includes 4 lessons in total.

Animatable clip-path

CSS can transition and animate between two clip-path values as long as both are the same shape function with the same number of arguments. Interpolation is point by point.

Slide Reveal Animation

A classic clip-path reveal — content slides in from left:

<div class="content visible"></div>

Circular Reveal

Expand a circle from center to reveal content:

<div class="overlay open"></div>

Shape Morphing

Animate between polygon shapes for a morphing effect. Both polygons must have the same number of vertices:

<div class="morph-shape"></div>

Matching Vertex Count

To animate between different polygon shapes (e.g., triangle to square), add extra coincident points to the simpler shape:

<div class="triangle-4pt"></div>
<div class="square-4pt"></div>

Hover Reveal Effect

A card image that clips to a circle on hover:

<div class="card">
  <div class="card-img"></div>
</div>

Wipe Transitions

Diagonal wipe transition for page changes:

<div class="page-enter"></div>

Performance of clip-path Animation

Animated clip-path triggers the paint stage on most browsers (unlike transform/opacity which are composite-only). For complex animations on large elements, test performance in DevTools before shipping.

clip-path vs mask-image for Animation

For complex animated transparency, mask-image with an animated gradient can be more performant than clip-path for simple directional reveals.

Spring Easing with clip-path

Spring-like easing creates organic-feeling reveals:

<div class="reveal"></div>

Quick Check

What is required for CSS to smoothly interpolate between two polygon() clip-path values?

Answer it in the interactive lesson

Recap

Animate between clip-path shapes using transitions or @keyframes. The same shape function with the same number of vertices is required for interpolation. Use circle() for expanding reveals, polygon() for wipes and morphs, and inset() for rectangular clip transitions. Match vertex counts by adding coincident points to simpler shapes.

Free to start

Learn CSS with an AI tutor — free

Write and run real code in your browser, get instant help from a 24/7 AI tutor, and pick up where you left off on the web or in the app.

Courses: 40
Lessons: 159

Start learning free View the full course

Frequently Asked Questions

Is the “Animating clip-path Shapes” lesson free?

Yes — the full text of “Animating clip-path Shapes” is free to read here on the web. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the CSS Academy course, upgrade to CoddyKit PRO. The CSS Academy course includes 4 lessons in total.

What will I learn in “Animating clip-path Shapes”?

Create dramatic reveal animations by transitioning between clip-path polygon values. You practise CSS Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start CSS Academy?

No prior experience is required. CSS Academy on CoddyKit is structured for beginners through advanced learners, so you can start here or from the beginning and move at your own pace. This is lesson 3 of 4.

How long does the “Animating clip-path Shapes” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this CSS Academy lesson?

Yes. Every CSS Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

All lessons in this course

← Back to CSS Academy