Helpers hastFromHtml This helper function helps you to get HTML AST from HTML string. import { hastFromHtml } from "mdx-svelte/unified" const svgHast = hastFromHtml( `<svg class="icon" xmlns="http://www.w3.org/2000/svg" fill="none" stroke="currentColor" stroke-width="1.5" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" d="M5.25 8.25h15m-16.5 7.5h15m-1.8-13.5-3.9 19.5m-2.1-19.5-3.9 19.5"/></svg>`, )Copy You can use this helper function in plugins like "rehype-autolink-headings". isHrefExternal This helper function helps you to check if a URL is external. import { isHrefExternal } from "mdx-svelte/unified" if ( isHrefExternal("http://example.com") && isHrefExternal("https://example.com") ) { // True }Copy