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npx skills add supermemoryai/skills --skill svg-animations
Create beautiful, performant SVG animations and illustrations. Use this skill when the user asks to create SVG graphics, icons, illustrations, animated logos, path animations, morphing shapes, loading spinners, or any animated SVG content. Covers SMIL animations, CSS-driven SVG animation, path drawing effects, shape morphing, motion paths, gradients, masks, and filters.
npx skills add supermemoryai/skills --skill svg-animations
This skill guides creation of handcrafted SVG animations — from simple animated icons to complex multi-stage path animations. SVGs are a markup language for images; every element is a DOM node you can style, animate, and script.
SVGs use a coordinate system defined by viewBox="minX minY width height". The viewBox is your canvas — all coordinates are relative to it, making SVGs resolution-independent.
<path> Element — The Power ToolThe d attribute defines a path using commands. Uppercase = absolute, lowercase = relative.
| Command | Purpose | Syntax |
|---|---|---|
| M/m | Move to | M x y |
| L/l | Line to | L x y |
| H/h | Horizontal line | H x |
| V/v | Vertical line | V y |
| C/c | Cubic bézier | C x1 y1, x2 y2, x y |
| S/s | Smooth cubic bézier | S x2 y2, x y |
| Q/q | Quadratic bézier | Q x1 y1, x y |
| T/t | Smooth quadratic | T x y |
| A/a | Elliptical arc | A rx ry rotation large-arc sweep x y |
| Z/z | Close path | Z |
Cubic Bézier (C): Two control points define the curve. The first control point sets the departure angle, the second sets the arrival angle.
Smooth Cubic (S): Reflects the previous control point automatically — perfect for chaining fluid S-curves.
Arc (A): rx ry x-rotation large-arc-flag sweep-flag x y
large-arc-flag: 0 = small arc, 1 = large arc (>180°)sweep-flag: 0 = counterclockwise, 1 = clockwiseUse <g> to group elements for collective transforms, styling, and animation targets.
Many SVG attributes are valid CSS properties: fill, stroke, opacity, transform, stroke-dasharray, stroke-dashoffset, etc.
The most iconic SVG animation. Uses stroke-dasharray and stroke-dashoffset to make a path appear to draw itself.
How it works:
stroke-dasharray to the path's total length (one giant dash + one giant gap)stroke-dashoffset to the same length (shifts the dash off-screen)stroke-dashoffset to 0 (slides the dash into view)Getting exact path length in JS:
d Property AnimationModern browsers support animating the d attribute directly in CSS:
Requirement: Both paths must have the same number and types of commands for interpolation to work.
SMIL animations are declared directly inside SVG markup. They work even when SVG is loaded as an <img> or CSS background-image — where CSS and JS can't reach.
<animate> — Animate Any AttributeWith keyframes:
<animateTransform> — Transform AnimationsTypes: translate, scale, rotate, skewX, skewY
<animateMotion> — Move Along a Pathrotate="auto" orients the element tangent to the path. rotate="auto-reverse" flips it 180°.
<set> — Discrete Value ChangesTrigger values:
begin="click" — on clickbegin="2s" — after 2 secondsbegin="other.end" — when another animation endsbegin="other.end + 1s" — 1s after another endsbegin="other.repeat(2)" — on 2nd repeat of anothercalcMode and keySplinescalcMode options: linear (default), discrete, paced, spline
keySplines takes cubic-bezier control points (x1 y1 x2 y2) per interval. Common easings:
0.42 0 0.58 10 0 0.58 10.34 1.56 0.64 1Both shapes must have identical command structures (same number of points, same command types):
Use viewBox, never hardcode width/height in the SVG — let the container size it. This keeps it resolution-independent.
<defs> for reusable definitions — gradients, filters, masks, clipPaths, and reusable shapes belong in <defs>.
Prefer SMIL for self-contained SVGs (icons, logos loaded via <img>) — CSS/JS won't work there. Use CSS animations when the SVG is inlined and you want to coordinate with the rest of the page.
Shape morphing requires matching commands — same number of path commands, same types, same order. If shapes differ, add invisible intermediate points to equalize.
stroke-linecap="round" makes line animations look polished.
fill="freeze" in SMIL keeps the final animation state. Without it, the element snaps back.
transform-origin: center in CSS — SVG transforms default to the origin (0,0), not the element center. Always set this explicitly.
Use getTotalLength() in JS to get exact path lengths for stroke animations instead of guessing.
Layer animations with <g> groups — animate the group transform separately from individual element properties for complex choreography.
Performance: SVG animations are GPU-composited when animating transform and opacity. Animating d, points, or layout attributes triggers repaints — use sparingly on complex SVGs.
will-change: transform on animated SVG elements helps the browser optimize compositing.
Accessibility: Add role="img" and <title> / <desc> elements. Use prefers-reduced-motion media query to disable animations for users who request it:
<rect x="10" y="10" width="80" height="40" rx="4" fill="#1a1a1a" />
<circle cx="50" cy="50" r="30" fill="#e63946" />
<ellipse cx="50" cy="50" rx="40" ry="20" fill="#457b9d" />
<line x1="10" y1="10" x2="90" y2="90" stroke="#2a9d8f" stroke-width="2" />
<polygon points="50,5 95,90 5,90" fill="#e9c46a" />
<polyline points="10,80 40,20 70,60 100,10" fill="none" stroke="#264653" stroke-width="2" /><path d="M 10 80 C 40 10, 65 10, 95 80" stroke="#000" fill="none" stroke-width="2" /><path d="M 10 80 C 40 10, 65 10, 95 80 S 150 150, 180 80" stroke="#000" fill="none" /><!-- Heart shape using arcs and quadratic curves -->
<path d="M 10,30 A 20,20 0,0,1 50,30 A 20,20 0,0,1 90,30 Q 90,60 50,90 Q 10,60 10,30 Z"
fill="#e63946" /><g transform="translate(50, 50) rotate(45)" opacity="0.8">
<rect x="-20" y="-20" width="40" height="40" fill="#264653" />
</g><defs>
<!-- Linear gradient -->
<linearGradient id="grad" x1="0%" y1="0%" x2="100%" y2="100%">
<stop offset="0%" stop-color="#e63946" />
<stop offset="100%" stop-color="#457b9d" />
</linearGradient>
<!-- Radial gradient -->
<radialGradient id="glow" cx="50%" cy="50%" r="50%">
<stop offset="0%" stop-color="#fff" stop-opacity="0.8" />
<stop offset="100%" stop-color="#fff" stop-opacity="0" />
</radialGradient>
<!-- Mask -->
<mask id="reveal">
<rect width="100%" height="100%" fill="black" />
<circle cx="100" cy="100" r="50" fill="white" />
</mask>
<!-- Blur filter -->
<filter id="blur">
<feGaussianBlur in="SourceGraphic" stdDeviation="3" />
</filter>
</defs>
<rect width="200" height="200" fill="url(#grad)" />
<rect width="200" height="200" fill="url(#grad)" mask="url(#reveal)" />
<circle cx="50" cy="50" r="20" filter="url(#blur)" fill="#e63946" />.pulse {
animation: pulse 2s ease-in-out infinite;
transform-origin: center;
}
@keyframes pulse {
0%, 100% { transform: scale(1); opacity: 1; }
50% { transform: scale(1.15); opacity: 0.7; }
}<svg viewBox="0 0 200 200">
<path class="draw" d="M 20 100 C 20 50, 80 50, 80 100 S 140 150, 140 100"
fill="none" stroke="#1a1a1a" stroke-width="3" />
</svg>
<style>
.draw {
stroke-dasharray: 300;
stroke-dashoffset: 300;
animation: draw 2s ease forwards;
}
@keyframes draw {
to { stroke-dashoffset: 0; }
}
</style>const path = document.querySelector('.draw');
const length = path.getTotalLength();
path.style.strokeDasharray = length;
path.style.strokeDashoffset = length;.line-1 { animation-delay: 0s; }
.line-2 { animation-delay: 0.3s; }
.line-3 { animation-delay: 0.6s; }path {
d: path("M 10,30 A 20,20 0,0,1 50,30 A 20,20 0,0,1 90,30 Q 90,60 50,90 Q 10,60 10,30 z");
transition: d 0.5s ease;
}
path:hover {
d: path("M 10,50 A 20,20 0,0,1 50,10 A 20,20 0,0,1 90,50 Q 90,80 50,100 Q 10,80 10,50 z");
}<circle cx="50" cy="50" r="20" fill="#e63946">
<animate attributeName="r" from="20" to="40" dur="1s"
repeatCount="indefinite" />
</circle><animate attributeName="cx"
values="50; 150; 100; 50"
keyTimes="0; 0.33; 0.66; 1"
dur="3s" repeatCount="indefinite" /><rect x="-20" y="-20" width="40" height="40" fill="#264653">
<animateTransform attributeName="transform" type="rotate"
from="0" to="360" dur="4s" repeatCount="indefinite" />
</rect><circle r="5" fill="#e63946">
<animateMotion dur="3s" repeatCount="indefinite" rotate="auto">
<mpath href="#motionPath" />
</animateMotion>
</circle>
<path id="motionPath" d="M 20,50 C 20,0 80,0 80,50 S 140,100 140,50"
fill="none" stroke="#ccc" /><rect width="40" height="40" fill="#264653">
<set attributeName="fill" to="#e63946" begin="1s" />
</rect><!-- Chain animations by referencing IDs -->
<animate id="first" attributeName="cx" to="150" dur="1s" fill="freeze" />
<animate attributeName="cy" to="150" dur="1s" begin="first.end" fill="freeze" />
<animate attributeName="r" to="30" dur="0.5s" begin="first.end + 0.5s" fill="freeze" /><animate attributeName="cx" values="50;150" dur="1s"
calcMode="spline" keySplines="0.42 0 0.58 1" /><path fill="#e63946">
<animate attributeName="d" dur="2s" repeatCount="indefinite"
values="M 50,10 L 90,90 L 10,90 Z;
M 50,90 L 90,10 L 10,10 Z;
M 50,10 L 90,90 L 10,90 Z" />
</path><svg viewBox="0 0 50 50">
<circle cx="25" cy="25" r="20" fill="none" stroke="#1a1a1a"
stroke-width="3" stroke-linecap="round"
stroke-dasharray="90 150" stroke-dashoffset="0">
<animateTransform attributeName="transform" type="rotate"
from="0 25 25" to="360 25 25" dur="1s"
repeatCount="indefinite" />
<animate attributeName="stroke-dashoffset" values="0;-280"
dur="1.5s" repeatCount="indefinite" />
</circle>
</svg><svg viewBox="0 0 52 52">
<circle cx="26" cy="26" r="24" fill="none" stroke="#4caf50"
stroke-width="2" class="draw"
style="stroke-dasharray:150;stroke-dashoffset:150;
animation:draw .6s ease forwards" />
<path fill="none" stroke="#4caf50" stroke-width="3"
stroke-linecap="round" stroke-linejoin="round"
d="M14 27l7 7 16-16" class="draw"
style="stroke-dasharray:50;stroke-dashoffset:50;
animation:draw .4s ease .5s forwards" />
</svg><svg viewBox="0 0 24 24" id="menu">
<path id="top" d="M 3,6 L 21,6" stroke="#1a1a1a" stroke-width="2" stroke-linecap="round">
<animate attributeName="d" to="M 5,5 L 19,19" dur="0.3s" begin="menu.click" fill="freeze" />
</path>
<path id="mid" d="M 3,12 L 21,12" stroke="#1a1a1a" stroke-width="2" stroke-linecap="round">
<animate attributeName="opacity" to="0" dur="0.1s" begin="menu.click" fill="freeze" />
</path>
<path id="bot" d="M 3,18 L 21,18" stroke="#1a1a1a" stroke-width="2" stroke-linecap="round">
<animate attributeName="d" to="M 5,19 L 19,5" dur="0.3s" begin="menu.click" fill="freeze" />
</path>
</svg><defs>
<linearGradient id="shift" x1="0%" y1="0%" x2="100%" y2="0%">
<stop offset="0%">
<animate attributeName="stop-color"
values="#e63946;#457b9d;#2a9d8f;#e63946"
dur="4s" repeatCount="indefinite" />
</stop>
<stop offset="100%">
<animate attributeName="stop-color"
values="#457b9d;#2a9d8f;#e63946;#457b9d"
dur="4s" repeatCount="indefinite" />
</stop>
</linearGradient>
</defs>
<rect width="200" height="100" fill="url(#shift)" rx="8" /><circle cx="100" cy="100" r="30" fill="#e63946">
<animate attributeName="r" values="30;35;30" dur="2s"
calcMode="spline" keySplines="0.4 0 0.6 1;0.4 0 0.6 1"
repeatCount="indefinite" />
<animate attributeName="opacity" values="1;0.6;1" dur="2s"
calcMode="spline" keySplines="0.4 0 0.6 1;0.4 0 0.6 1"
repeatCount="indefinite" />
</circle><path fill="#457b9d" opacity="0.7">
<animate attributeName="d" dur="5s" repeatCount="indefinite"
values="M 0,40 C 30,35 70,45 100,40 L 100,100 L 0,100 Z;
M 0,40 C 30,50 70,30 100,40 L 100,100 L 0,100 Z;
M 0,40 C 30,35 70,45 100,40 L 100,100 L 0,100 Z"
calcMode="spline" keySplines="0.4 0 0.6 1;0.4 0 0.6 1" />
</path>@media (prefers-reduced-motion: reduce) {
svg * {
animation: none !important;
transition: none !important;
}
}