feature: add generateJSON utility function to generate JSON from a HTML string

packages/core/src/helpers/generateJSON.ts

@@ -0,0 +1,13 @@
+import { DOMParser } from 'prosemirror-model'
+import getSchema from './getSchema'
+import elementFromString from '../utilities/elementFromString'
+import { Extensions } from '../types'
+
+export default function generateJSON(html: string, extensions: Extensions): Record<string, any> {
+  const schema = getSchema(extensions)
+  const dom = elementFromString(html)
+
+  return DOMParser.fromSchema(schema)
+    .parse(dom)
+    .toJSON()
+}