npm i --save @graphcentral/notion-graph-scraper

You will be able to visualize the output from @graphcentral/notion-graph-scraper with @graphcentral/graph like below:

First, get a public Notion page (if you just want to test it out), preferably with some sub-pages inside it, so that you can get a graph with some nodes. You can also request private pages if you create your own instance of NotionAPI from notion-client. The example below is only for public pages.

Then, get the id of the page like below:

Then, input the id of the page as a parameter to notionGraph.buildGraphFromRootNode

import { NotionGraph } from "@graphcentral/notion-graph-scraper"
import fs from "fs"
/**
 * example of how to use `@graphcentral/notion-graph-scraper`
 */
;(async () => {
  const notionGraph = new NotionGraph({
    maxDiscoverableNodes: 2000,
    maxDiscoverableNodesInOtherSpaces: 2000,
    verbose: true,
  })
  const graph = await notionGraph.buildGraphFromRootNode(
    // Some random Japanese blog
    `95fcfe03257541c5aaa21dd43bdbc381`
  )
  console.log(graph.nodes.length)
  console.log(graph.links.length)
  await new Promise((resolve, reject) => {
    fs.writeFile(`test0.json`, JSON.stringify(graph), (err) => {
      if (err) reject(err)
      else resolve(``)
    })
  });

  process.exit(0)
})()

The graph will be an object of this type:

{
  nodes: Node[]
  links: Link[]
  errors: Error[]
}

Then, you can directly use this as an input to @graphcentral/graph to visualize it on the web as a force layout graph.

An example setup is at @graphcentral/notion-scrape-example.

This project uses es6 module (.mjs). Therefore, the following setup is needed:

In your package.json, specify "type" as "module"

{
  ...
  "type": "module",
  ...
}

Then, using the latest version of node (this project uses whatever is specified in .nvmrc which is as of now v16.15.1), just run node index.js where index.js contains the previous example code.