first commit; migrate code from minimal/docs-server

src/html-sanitize.ts

@@ -0,0 +1,14 @@
+
+import { JSDOM } from 'jsdom';
+import createDOMPurify = require('dompurify');
+
+export function sanitize_html(html: string) : string {
+	const { window } = new JSDOM('');
+	const dom_purify = createDOMPurify(window as any as Window);
+	return dom_purify.sanitize(html, {
+		CUSTOM_ELEMENT_HANDLING: {
+			tagNameCheck: (tag_name) => tag_name === 'svg-icon',
+			attributeNameCheck: (attr_name) => attr_name === 'icon',
+		}
+	});
+}