Examples
Backend
Saving & Loading

Saving & Loading

This example shows how to save the editor contents to local storage whenever a change is made, and load the saved contents when the editor is created.

You can replace the saveToStorage and loadFromStorage functions with calls to your backend or database.

Try it out: Try typing in the editor and reloading the page!

Relevant Docs:

import { Block, BlockNoteEditor, PartialBlock } from "@blocknote/core";
import "@blocknote/core/fonts/inter.css";
import { BlockNoteView } from "@blocknote/mantine";
import "@blocknote/mantine/style.css";
import { useEffect, useMemo, useState } from "react";
 
async function saveToStorage(jsonBlocks: Block[]) {
  // Save contents to local storage. You might want to debounce this or replace
  // with a call to your API / database.
  localStorage.setItem("editorContent", JSON.stringify(jsonBlocks));
}
 
async function loadFromStorage() {
  // Gets the previously stored editor contents.
  const storageString = localStorage.getItem("editorContent");
  return storageString
    ? (JSON.parse(storageString) as PartialBlock[])
    : undefined;
}
 
export default function App() {
  const [initialContent, setInitialContent] = useState<
    PartialBlock[] | undefined | "loading"
  >("loading");
 
  // Loads the previously stored editor contents.
  useEffect(() => {
    loadFromStorage().then((content) => {
      setInitialContent(content);
    });
  }, []);
 
  // Creates a new editor instance.
  // We use useMemo + createBlockNoteEditor instead of useCreateBlockNote so we
  // can delay the creation of the editor until the initial content is loaded.
  const editor = useMemo(() => {
    if (initialContent === "loading") {
      return undefined;
    }
    return BlockNoteEditor.create({ initialContent });
  }, [initialContent]);
 
  if (editor === undefined) {
    return "Loading content...";
  }
 
  // Renders the editor instance.
  return (
    <BlockNoteView
      editor={editor}
      onChange={() => {
        saveToStorage(editor.document);
      }}
    />
  );
}