Uso con Node.js

Podemos renderizar fácilmente un Markmap como una imagen PNG usando Node.js aprovechando node-html-to-image, que usa Puppeteer en segundo plano.

import { Transformer } from 'markmap-lib';
import { fillTemplate } from 'markmap-render';
import nodeHtmlToImage from 'node-html-to-image';
import { writeFile } from 'node:fs/promises';

async function renderMarkmap(markdown: string, outFile: string) {
	const transformer = new Transformer();
	const { root, features } = transformer.transform(markdown);
	const assets = transformer.getUsedAssets(features);
	const html =
		fillTemplate(root, assets, {
			jsonOptions: {
				duration: 0,
				maxInitialScale: 5,
			},
		}) +
		`
<style>
body,
#mindmap {
  width: 2400px;
  height: 1800px;
}
</style>
`;
	const image = await nodeHtmlToImage({
		html,
	});
	await writeFile(outFile, image);
}

renderMarkmap(markdown, 'markmap.png');

Nota: Puppeteer puede consumir mucha memoria.