Using AceBase instead of Dexie.js to store sticky notes in the browser's IndexedDB. See Andy Haskell's IndexedDB tutorial Part 4 at https://dev.to/andyhaskell/using-dexie-js-to-write-slick-indexeddb-code-304o

db.js

let { AceBase } = require('acebase');

// Database contains all IndexedDB database logic for our web app.
class Database {
  // The constructor opens/creates the database titled 'my_db_(namespace)'
  constructor(namespace) {

    // Use AceBase.WithIndexedDB to create an AceBase instance 
    // that uses IndexedDB to store its data
    let name = Database.dbName(namespace);
    let db = AceBase.WithIndexedDB(name, { logLevel: 'log' });

    // Keep a reference to the notes node
    this.notes = db.ref('notes');
  }

  // addStickyNote adds a sticky note with the text passed in to the "notes"
  // object store. Returns a promise that resolves when the sticky note is
  // successfully added.
  addStickyNote(message) {
    return this.notes.push({
      text:      message,
      timestamp: new Date(),
    });
  }

  // getNotes retrieves all sticky notes from the "notes" object store. Returns
  // a promise that resolves when we successfully retrieve the sticky notes,
  // giving us the notes in an array.
  getNotes(reverseOrder) {
    return this.notes
        .query()
        .sort('timestamp', !reverseOrder)
        .get()
        .then(snaps => snaps.getValues());
  }

  // dbName sets up the name of the database using an optional namespace
  // parameter for test coverage.
  static dbName(namespace) {
    return namespace != undefined ?
      `my_db_${namespace}` :
      'my_db';
  }
}

module.exports = Database;