This article demonstrates Houdini's capabilities by creating a 3D card flip animation. It guides you through the core concepts and practical implementation, showing how to enhance your workflow and achieve advanced CSS animations.
Traditional CSS animation limitations are overcome by Houdini, a set of experimental browser APIs offering unprecedented control over the rendering engine. This allows for unique visual experiences previously impossible, pushing web design boundaries.
Key Concepts:
- Houdini's core APIs (Worklets, Custom Properties, Paint API)
- Creating interactive 3D animations
- Expanding the card flip example
Houdini's Triad:
Houdini extends the browser's rendering engine, enabling custom animations, effects, and styles. We'll explore its three main APIs in detail. (Note: Enable Houdini in chrome://flags/ by searching for and activating relevant experiments.)
Worklets:
JavaScript modules running within the browser's rendering engine, enabling custom paint, layout, and animation behaviors. Worklets allow for:
- Dynamic animations (e.g., animating stroke width based on user interaction)
- Interactive effects (e.g., particle systems, ripple effects)
- Extended visual styles (e.g., custom gradients, patterns)
- JavaScript integration
Worklet Example: Starry Night Sky:
A starry night effect illustrates worklet usage. The HTML includes a <div> for the effect:
<pre class='brush:php;toolbar:false;'><div id="night-sky"></div>
<??></pre>
<p>CSS applies the worklet:</p>
<pre class='brush:php;toolbar:false;'>#night-sky {
width: 100vw;
height: 100vh;
background-image: paint(starrySky);
}</pre>
<p>JavaScript (app.js) creates the starry effect:</p>
<pre class='brush:php;toolbar:false;'>class Star { paint(ctx, geom, properties) { /* ... star drawing logic ... */ } }
registerPaint('starrySky', Star);</pre>
<p><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/173899357963721.jpg" class="lazy" alt="Building a 3D Card Flip Animation with CSS Houdini " /></p>
<p><strong>Custom Properties:</strong></p>
<p>Advanced CSS variables offering type checking, syntax definition, and custom logic for dynamic styling.</p>
<p><strong>Custom Property Example: Circular Progress Bar:</strong></p>
<p>A circular progress bar demonstrates custom properties and paint worklets. The HTML:</p>
<pre class='brush:php;toolbar:false;'><div class="progress" data-progress="0"></div></pre>
<p>CSS defines the progress bar and the <code>--progress
custom property:
@property --progress { syntax: '<percentage>'; inherits: false; initial-value: 0%; } .progress { background: conic-gradient(...var(--progress)...); }
JavaScript (paint-worklet.js) handles the painting:
class PaintWorklet { paint(ctx, { width, height, progress }) { /* ... drawing logic ... */ } }
Another JavaScript file registers the worklet and updates the progress:
// ... code to register the paint worklet and update --progress ...
Paint API:
Enables dynamic and customized visual styles. Key features include paint worklets, custom properties, and the paint()
function.
Paint API Example: Dynamic Pattern:
This example creates a dynamic pattern of circles. The HTML:
<div id="night-sky"></div> <??>
CSS applies the paint worklet:
#night-sky { width: 100vw; height: 100vh; background-image: paint(starrySky); }
JavaScript (app.js) defines the pattern:
class Star { paint(ctx, geom, properties) { /* ... star drawing logic ... */ } } registerPaint('starrySky', Star);
Interactive 3D Card Flip:
This section details building a 3D card flip animation using Houdini. The HTML, CSS, and JavaScript (app.js and paintWorklet.js) are provided, demonstrating the integration of worklets, custom properties, and the Paint API to create a hover-triggered animation.
Expanding the Card Flip:
The card flip is integrated into a sample company website staff section, showcasing its practical application. Modified HTML, CSS, and JavaScript are shown, demonstrating how to incorporate images and staff information.
Conclusion:
This article provides a comprehensive introduction to Houdini's capabilities, demonstrating its potential for creating innovative and interactive web experiences. The examples illustrate how to leverage worklets, custom properties, and the Paint API to achieve advanced visual effects and enhance web development workflows.
The above is the detailed content of Building a 3D Card Flip Animation with CSS Houdini. For more information, please follow other related articles on the PHP Chinese website!

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