Usage

$ npm install gradient2svg

Convert linear-gradient() and radial-gradient()

import cssGradient2SVG from 'gradient2svg'

// Linear gradient
const svgGradient1 = cssGradient2SVG('linear-gradient(55deg, #f00, #000)');
/*
  <linearGradient data-gradient-angle="55" x1="9.04%" y1="78.68%" x2="90.96%" y2="21.32%">
    <stop offset="0%" style="stop-color: #f00;" /
    <stop offset="100%" style="stop-color: #000;" />
  </linearGradient>
*/

// Radial gradient
const svgGradient2 = cssGradient2SVG('radial-gradient(circle at 10% center, #f00 10%, #00f 95%)');

/*
  <radialGradient cx="0.1" cy="0.5" r="50%">
    <stop offset="10%" style="stop-color: #f00;" />
    <stop offset="95%" style="stop-color: #00f;" />
  </linearGradient>
*/

Imporrtant

Currently, the <size> keywords such as closest-side, closest-corner, farthest-side, farthest-corner, cover and contain that are describing a responsive size of a radial-gradient in CSS are NOT supported because there is no way to describe this in plain SVG.