material-shapes-ts

All 35 Material Design shapes for the web, plus smooth morphing between any two of them. A faithful TypeScript port of the AndroidX Graphics Shapes library and Compose MaterialShapes.

Every shape is a rounded polygon rendered to plain SVG path data, so it drops straight into a <path d>, a CSS clip-path: path(), or a canvas Path2D — in any framework or none. Optional Vue 3 bindings ship separately.

• Zero runtime dependencies in the core.
• 35 shapes — Circle, Square, Slanted, Arch, Semicircle, Oval, Pill, Triangle, Arrow, Fan, Diamond, Clamshell, Pentagon, Gem, Very sunny, Sunny, 4/6/7/9/12-sided cookie, 4/8-leaf clover, Burst, Soft burst, Boom, Soft boom, Flower, Puffy, Puffy diamond, Ghost-ish, Pixel circle, Pixel triangle, Bun, Heart.
• Morphing with corner-aware matching (convex↔convex), plus a batteries-included animateMorph() using Material 3 easing.

Install

npm install material-shapes-ts
# pnpm add material-shapes-ts   /   yarn add material-shapes-ts

Quick start — a shape as SVG

import { MaterialShapes, roundedPolygonToPath } from 'material-shapes-ts';

const d = roundedPolygonToPath(MaterialShapes.Heart).toSvgPathData();

// Coordinates live in a normalized 0..1 box, so a unit viewBox renders natively:
// <svg viewBox="0 0 1 1"><path d="…" /></svg>
pathEl.setAttribute('d', d);

// Or clip any element to the shape:
box.style.clipPath = `path('${d}')`;

Accessing shapes

Each shape is a lazily-computed, cached RoundedPolygon:

MaterialShapes.Circle;        // RoundedPolygon
MaterialShapes.Cookie7Sided;
MaterialShapes.Heart;

MaterialShapes.names;                 // readonly ['Circle', 'Square', …] (35, in chart order)
MaterialShapes.byName('Heart');       // lookup by name
MaterialShapes.all();                 // [{ name, polygon }, …] — handy for galleries

Morphing between shapes

A Morph matches the corners of two shapes and interpolates between them. Sample a frozen frame at any progress 0..1:

import { MaterialShapes, Morph, morphToPath } from 'material-shapes-ts';

const morph = new Morph(MaterialShapes.Circle, MaterialShapes.Heart);
const halfway = morphToPath(morph, 0.5).toSvgPathData();

Animating

animateMorph() builds the morph once and drives it with requestAnimationFrame, handing you an SVG path string each frame:

import { MaterialShapes, animateMorph } from 'material-shapes-ts';

const anim = animateMorph(MaterialShapes.Circle, MaterialShapes.Heart, {
  duration: 400,           // ms (default 400)
  easing: 'emphasized',    // a Material token name or your own (t) => number
  onFrame: (d) => pathEl.setAttribute('d', d),
  onComplete: () => {},
});

anim.cancel();             // stop early
await anim.finished;       // resolves when done (or cancelled)

Material 3 easing tokens are exported as Easings (linear, standard, standardAccelerate, standardDecelerate, emphasized, emphasizedAccelerate, emphasizedDecelerate), and cubicBezier(x1,y1,x2,y2) builds your own.

Vue 3

Bindings live in the material-shapes-ts/vue subpath (vue is an optional peer dependency, never bundled into the core). They come in three flavours: render a shape as SVG, clip any element to a shape, and morph either on interaction.

Render a shape as SVG

<script setup lang="ts">
import { ref } from 'vue';
import { MaterialShape, ShapeMorph, useMorph } from 'material-shapes-ts/vue';

const t = ref(0); // bind to a slider
const heartPath = useMorph('Circle', 'Heart', t); // reactive path string
</script>

<template>
  <MaterialShape :shape="'Heart'" :size="120" color="deeppink" />
  <ShapeMorph from="Circle" to="Heart" :progress="t" :size="120" />
  <svg viewBox="0 0 1 1"><path :d="heartPath" /></svg>
</template>

Clip any element to a shape — the v-material-shape directive

Because shapes are normalized to a 0..1 box, they map 1:1 onto an SVG clipPath with clipPathUnits="objectBoundingBox", so one path clips an element at any size.

<button v-material-shape="'Flower'">Save</button>

<!-- morph on hover / focus (respects prefers-reduced-motion) -->
<button v-material-shape="{ rest: 'Circle', hover: 'Flower', duration: 300, easing: 'emphasized' }">
  Save
</button>

Heads-up: clip-path also clips box-shadow, CSS borders and the focus ring. For interactive elements reach for <ShapeSurface>, which restores a focus ring and supports drop-shadow elevation.

Shaped surfaces & backdrops

<script setup lang="ts">
import { ShapeSurface, ShapeBackdrop } from 'material-shapes-ts/vue';
</script>

<template>
  <!-- clips the slot to a shape, morphs on hover, keeps an accessible focus ring -->
  <ShapeSurface shape="Circle" hover-shape="Flower" :size="72">
    <MyIcon />
  </ShapeSurface>

  <!-- a filled shape behind content -->
  <ShapeBackdrop shape="Sunny" color="teal" :opacity="0.12">
    <h2>Sits on top of the shape</h2>
  </ShapeBackdrop>
</template>

Style <ShapeSurface> with --shape-focus-color (focus ring) and --shape-surface-shadow (a drop-shadow filter, since box-shadow is clipped away).

Register globally (optional)

import { MaterialShapesPlugin } from 'material-shapes-ts/vue';
app.use(MaterialShapesPlugin); // v-material-shape, <ShapeSurface>, <ShapeBackdrop>

Also exported: useShapePath(shape), useShapeClip(shape), useShapeMorphClip(from, to, progress) (return { clipId, pathD, clipStyle } for rolling your own clipped element).

Rendering recipes

const d = roundedPolygonToPath(MaterialShapes.Pill).toSvgPathData();

// 1. Inline SVG — <svg viewBox="0 0 1 1">
svg.innerHTML = `<path d="${d}" fill="currentColor" />`;

// 2. Clip an image / element (CSS)
img.style.clipPath = `path('${d}')`;

// 3. Canvas
const p = new Path2D(d);
ctx.save(); ctx.scale(size, size); ctx.fill(p); ctx.restore();

Demo

An interactive gallery + morph playground lives in demo/. Build a self-contained page with:

npm run build          # compile the library
npm run build:demo     # inline it into demo/index.html

Then open demo/index.html.

Development

npm run build   # tsc → dist/
npm test        # node:test — validates all 35 shapes + all 35×35 morph pairs

Releasing

CI publishes to the public npm registry on every v* tag (see .github/workflows/publish.yml). One-time setup: add an npm Automation token as the NPM_TOKEN repo secret.

# bump "version" in package.json (e.g. 0.2.0 → 0.2.1), commit, then:
git tag v0.2.1
git push --tags        # → runs build + tests, then publishes with provenance

The tag must match package.json's version or the workflow fails. Every push and PR also runs build + tests via ci.yml.

Credits & license

Ported from the Android Open Source Project's androidx.graphics.shapes and androidx.compose.material3.MaterialShapes. Licensed under Apache-2.0.