React Gradient Path

A small library to have any gradient follow along any SVG path written in TypeScript and wrapped in a React component.

This library is inspired of the work of Patrick Cason.

Which in turn is inspired of the work of the great Mike Bostock.

We opted to use svgPathProperties to avoid the need for manipulating DOM elements directly.

Installation

npm install --save react-gradient-path

Example

import {createRoot} from 'react-dom/client';
import GradientPath from 'react-gradient-path';

const color = [
    {color: '#C6FFDD', pos: 0},
    {color: '#FBD786', pos: 0.25},
    {color: '#F7797D', pos: 0.5},
    {color: '#6DD5ED', pos: 0.75},
    {color: '#C6FFDD', pos: 1},
];

const App = () => (
    <svg width="300" height="200" viewBox="0 0 100 100">
        <GradientPath
            d="M24.3,30 C11.4,30,5,43.3,5,50 s6.4,20,19.3,20 c19.3,0,32.1-40,51.4-40 C88.6,30,95,43.3,95,50 s-6.4,20-19.3,20 C56.4,70,43.6,30,24.3,30z"
            width={10}
            segments={100}
            samples={10}
            fill={color}
        />
    </svg>
);

createRoot(document.getElementById('root')!).render(<App />);

A note about antialiasing

As Mike Bostock mentioned in his example:

This example uses a thin stroke in addition to filling the segments. This avoids antialiasing artifacts due to most web browsers not implementing full-scene antialiasing.

This is true and unavoidable. In both his example and in Gradient Path, you may notice small gaps between the edges of each segment. Don't worry, your glasses are working just fine.

To fix this you can add a very subtle stroke the same color as the fill, like this:

<GradientPath
    d="M24.3,30 C11.4,30,5,43.3,5,50 s6.4,20,19.3,20 c19.3,0,32.1-40,51.4-40 C88.6,30,95,43.3,95,50 s-6.4,20-19.3,20 C56.4,70,43.6,30,24.3,30z"
    width={10}
    segments={100}
    samples={10}
    strokeWidth={0.5}
    stroke={color}
    fill={color}
/>

Contributing

1. npm install - installs all dev dependencies
2. npm start - starts example app preview on http://localhost:3000

Fork and PR at will!

Acknowledgements

Mike Bostock @cereallarceny