To animate an SVG, choose the method that matches the change: use SVG animation elements such as <animate> for attribute changes and motion paths, CSS keyframes or transitions for style changes, and JavaScript when animation must respond to user input or application state. The examples below show each method and how to account for reduced-motion preferences.
Choose an SVG animation method
| Method | Use it when | Typical examples |
|---|---|---|
| SVG animation elements | You want to declare attribute changes, transforms, or path motion in the SVG markup. | Move a circle, rotate a shape, or move an object along a path. |
| CSS animations or transitions | The change can be expressed as a CSS property and you want motion rules in a stylesheet. | Animate opacity, fill, or transforms. |
| JavaScript and the SVG DOM | The animation depends on events, data, or application state. | Start or change an animation when a user interacts with an SVG. |
SVG supports declarative animation in markup as well as scripting. The right choice depends on what changes, how interactive it is, and how the SVG will be embedded. W3C SVG 2 introduction describes both declarative and scripted animation.
Animate an SVG attribute with <animate>
Place an <animate> element inside the SVG shape whose attribute should change. This example moves a circle horizontally and repeats the motion:
<svg viewBox="0 0 300 100" xmlns="http://www.w3.org/2000/svg">
<circle cx="0" cy="50" r="15" fill="blue">
<animate attributeName="cx" from="0" to="300" dur="3s" repeatCount="indefinite" />
</circle>
</svg>attributeName identifies the attribute to animate; from and to set its endpoints; dur sets the duration; and repeatCount controls repetition. Change the attribute and values to suit the effect. For a discrete change rather than a continuous interpolation, SVG also defines <set>. See MDN’s <animate> reference and the W3C SVG Animations draft.
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Animate transforms or motion along a path
Use <animateTransform> when the animated value is a transform, such as rotation or scaling. Use <animateMotion> to move an element along a path; it can also rotate the element to follow the path’s tangent. These elements are useful when the effect is geometric motion rather than a change in a style such as opacity. MDN’s SVG animation guide explains these forms.
Animate an SVG with CSS
CSS keyframes animate CSS property values over time. This example scales a circle and changes its opacity:
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<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg" aria-labelledby="title">
<title id="title">Pulsing circle</title>
<circle class="pulse" cx="50" cy="50" r="20" />
</svg>.pulse {
transform-box: fill-box;
transform-origin: center;
animation: pulse 1.2s ease-in-out infinite alternate;
}
@keyframes pulse {
to { transform: scale(1.25); opacity: 0.65; }
}A CSS transition is another option when a property should change smoothly in response to a state change, rather than play through a keyframe sequence. CSS is a good fit for style-driven effects, but support and behavior depend on the specific property and the SVG’s embedding context; check the target browsers for the exact combination you plan to use. The sources do not establish that CSS is always faster or preferable to SVG animation elements.
Use JavaScript for interaction or dynamic behavior
JavaScript can access SVG elements, attributes, and properties through the SVG DOM, and event handlers can be assigned to graphical objects. Choose scripting when the animation must respond to a click, changing data, or application state. A particular JavaScript animation library is not required by the approach described here; use the SVG DOM directly or a library that fits your application.
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Keep the SVG accessible to the page and identify the element to be changed, then update the relevant attribute or style in response to the event or state change. The exact script depends on your interaction and application structure. See the W3C SVG 2 introduction for SVG scripting and event handling context.
Make animation safe to pause or reduce
Motion can cause discomfort for some people; blinking and flashing can be especially problematic. Provide a pause or disable mechanism for substantial or persistent motion, and respect the user’s reduced-motion preference. MDN discusses these concerns in its reduced-motion media query guide.
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For the CSS pulse above, a reduced-motion rule can disable the effect:
@media (prefers-reduced-motion: reduce) {
.pulse {
animation: none;
}
}For animation declared in SVG markup or driven by JavaScript, also provide a suitable control or alternate state. A CSS media query alone should not be assumed to control every animation mechanism or every way an SVG is embedded.
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Check the SVG’s browser and embedding context
Browser support is feature-specific: verify the exact animation element or CSS property in the browsers you target, and test whether the SVG is inline in HTML or referenced as an image. MDN describes <animate> as widely available across browsers since January 2020, but that milestone is not a guarantee that every SVG animation feature behaves identically in all browsers or embedding modes. MDN’s reference was last modified September 11, 2026; its SMIL guide was last modified July 30, 2026. The W3C SVG Animations page is a living Group Draft.
Troubleshoot common SVG animation problems
- The shape does not move: Confirm that
attributeNamematches an animatable attribute on the element and that the starting and ending values are valid for it. - A CSS transform looks misplaced: SVG transform origins can depend on the element’s coordinate system. Test with
transform-boxandtransform-origin, as in the CSS example, and check the result in your target browsers. - The animation works inline but not as an image: The embedding context can affect which mechanisms work. Test the delivered form rather than assuming inline SVG and referenced SVG behave the same.
- The effect cannot be stopped by your reduced-motion rule: The CSS rule shown applies to CSS animation. Add an appropriate control or alternate state for markup-driven or scripted animation.
- Motion is inconsistent across browsers: Check support for the specific animation element or CSS property and the target browser versions; do not infer support for every feature from the availability of
<animate>.
Or skip the browser setup
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