Displaying Document JSON

import { Block } from "@blocknote/core";
import "@blocknote/core/fonts/inter.css";
import { BlockNoteView } from "@blocknote/mantine";
import "@blocknote/mantine/style.css";
import { useCreateBlockNote } from "@blocknote/react";
import { useState } from "react";

import "./styles.css";

export default function App() {
  // Stores the document JSON.
  const [blocks, setBlocks] = useState<Block[]>([]);

  // Creates a new editor instance.
  const editor = useCreateBlockNote({
    initialContent: [
      {
        type: "paragraph",
        content: "Welcome to this demo!",
      },
      {
        type: "heading",
        content: "This is a heading block",
      },
      {
        type: "paragraph",
        content: "This is a paragraph block",
      },
      {
        type: "paragraph",
      },
    ],
  });

  // Renders the editor instance and its document JSON.
  return (
    <div className={"wrapper"}>
      <div>BlockNote Editor:</div>
      <div className={"item"}>
        <BlockNoteView
          editor={editor}
          onChange={() => {
            // Saves the document JSON to state.
            setBlocks(editor.document);
          }}
        />
      </div>
      <div>Document JSON:</div>
      <div className={"item bordered"}>
        <pre>
          <code>{JSON.stringify(editor.document, null, 2)}</code>
        </pre>
      </div>
    </div>
  );
}

.wrapper {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.item {
  border-radius: 0.5rem;
  flex: 1;
  overflow: hidden;
}

.item.bordered {
  border: 1px solid gray;
}

.item pre {
  border-radius: 0.5rem;
  height: 100%;
  overflow: auto;
  padding-block: 1rem;
  padding-inline: 54px;
  width: 100%;
  white-space: pre-wrap;
}