const SiteClient = require('datocms-client').SiteClient;
const client = new SiteClient('YOUR-API-TOKEN');
const itemId = '6542';
client.itemVersions.all(itemId)
.then((itemVersions) => {
    itemVersions.forEach((itemVersion) => {
      console.log(itemVersion);
    });
  })
.catch((error) => {
  console.error(error);
});
// if you want to fetch all the pages with just one call:
client.itemVersions.all(itemId)
.then((itemVersions) => {
    itemVersions.forEach((itemVersion) => {
      console.log(itemVersion);
    });
  })

> node example.js
{
  "id": "6542",
  "title": "My first blog post!",
  "content": "Lorem ipsum dolor sit amet...",
  "category": "24",
  "image": {
    "alt": "Alt text",
    "title": "Image title",
    "customData": {},
    "focalPoint": null,
    "uploadId": "20042921"
  },
  "meta": {
    "created_at": "2020-04-21T07:57:11.124Z",
    "is_valid": true,
    "is_published": true,
    "is_current": true
  },
  "itemType": "44",
  "item": "4235",
  "editor": "312"
}