Exports a indexeddb from any website

export-indexeddb.js

// Use the latest version of your web-browser
// Tested on chrome 72

// A function to inject scripts in the current webpage
async function injectScript (url) { 
  return new Promise((resolve) => {
    let script = document.createElement('script');
    script.type = 'text/javascript';
    script.async = true;
    script.onload = function(){
       resolve();
    };
    script.src = url;
    document.getElementsByTagName('head')[0].appendChild(script);
  });
}

// We will be using a promise based library for indexeddb (It's from jake, you can trust it :))
// This will put `idb` in the global scope (window)
await injectScript('https://wzrd.in/standalone/idb')

// If the above does not work you copy the script manually from here
// https://raw.githubusercontent.com/jakearchibald/idb/master/build/idb.js

// To get list of all dbs and their version
let dbs = await window.indexedDB.databases(),
    db = dbs[0], // we are exporting the 1st db, change this as per your needs
    dbPromise = await idb.openDb(db.name, db.version),
    tableNames = [].slice.apply(dbPromise.objectStoreNames);

// Log contents from all the tables
await Promise.all(tableNames.map(async (tableName) => {
    return {
        [tableName]: await dbPromise.transaction(tableName).objectStore(tableName).getAll()
    }
}));

Do you have video tutorial.
Thanks a lot

In line 28, it should be openDB instead of openDb