Parse RDFa from HTML in Deno

rdfa-parsing-deno.ts

import jsonld from "https://esm.sh/jsonld?target=esnext"
import jsonldRdfaParser from "https://esm.sh/jsonld8-rdfa-parser?target=esnext"
import { DOMParser, Node } from "https://esm.sh/linkedom?target=esnext";
import * as path from "jsr:@std/path"

//@ts-ignore
Node.prototype.getAttributeNodeNS = function(_, attr){ return this.getAttributeNode(attr) }
jsonld.registerRDFParser('text/html', jsonldRdfaParser);

const filePath = "index.html"

const document = parser.parseFromString(await Deno.readTextFile(filePath), "text/html")

const base = document.createElement("base")
base.setAttribute("href", path.toFileUrl(path.resolve(filePath)))
document.head.append(base)

const json = await jsonld.fromRDF(document.documentElement, {format: 'text/html'})