add getSchema & getHtml utility functions to generate HTML from a ProseMirror/tiptap document, without an Editor instance

packages/core/src/utils/generateHtml.ts

@@ -0,0 +1,21 @@
+import Extension from '../Extension'
+import Node from '../Node'
+import Mark from '../Mark'
+import getSchema from './getSchema'
+import { Node as ProseMirrorNode, DOMSerializer } from "prosemirror-model"
+
+export default function generateHtml(doc: object, extensions: (Extension | Node | Mark)[]): string {
+  const schema = getSchema(extensions)
+
+  let contentNode = ProseMirrorNode.fromJSON(schema, doc)
+  let temporaryDocument = document.implementation.createHTMLDocument()
+  const div = temporaryDocument.createElement('div')
+
+  const fragment = DOMSerializer
+    .fromSchema(schema)
+    .serializeFragment(contentNode.content)
+
+  div.appendChild(fragment)
+
+  return div.innerHTML
+}