JSFiddle - React, Tailwind, and code Playground

JavaScript

window.indexedDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB;

const DB_NAME = 'dbName';
const DB_VERSION = 1;
const DB_STORE_NAME = 'dbStore';

var db;

    var req = indexedDB.open(DB_NAME, DB_VERSION);
    req.onsuccess = function (evt) {
        db = this.result;
        console.log('success', evt.target.result);
    };
    req.onerror = function (evt) {
        console.error("error", evt);
    };
    req.onblocked = function (evt) {
        console.log('blocked', evt);
    };