When webpack config target option is 'node' svg-sprite-loader will use isomorphic runtime sprite module.
import symbol from '../assets/twitter.svg';
// Import sprite instance which already contains twitter logo required above
import sprite from 'svg-sprite-loader/runtime/sprite.build';
// Render sprite
const spriteContent = sprite.stringify();
const pageContent = `
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
</head>
<body>
${spriteContent}
<svg viewBox="${symbol.viewBox}">
<use xlink:href="#${symbol.id}"></use>
</svg>
</body>
</html>
`;
console.log(pageContent);