import { parse, TreeAdapter } from "parse5"; import * as SerializerStream from "parse5-serializer-stream"; import { createReadStream, createWriteStream } from "fs"; const document = parse(""); const defaultAdapter = new Object() as TreeAdapter; let serializer = new SerializerStream(document); serializer = new SerializerStream(document, { treeAdapter: defaultAdapter }); serializer = new SerializerStream(document, { treeAdapter: defaultAdapter }); serializer.pipe(createWriteStream("file"));