JSFiddle - React, Tailwind, and code Playground

JavaScript

var db_name = 'SO_22977915t',
    store_name = 'people';
$.ajax({
    url: '/echo/json/',
    type: 'post',
    dataType: 'json',
    data: {
        json: JSON.stringify({
            case1: [{
                "name": "nick",
                    "age": 28
            }, {
                "name": "katie",
                    "age": 32
            }],
            case2: [{
                "husband": {
                    "name": "Jhon",
                        "age": 23
                },
                    "wife": {
                    "name": "Marie",
                        "age": 25
                }
            }]
        })
    },
    success: function (data) {
        var request,
        upgrade = false,
            doTx = function (db, entry) {
                addData(db, entry, function () {
                    getData(db);
                });
            },
            getData = function (db) {
                db.transaction([store_name], "readonly").objectStore(store_name).openCursor(IDBKeyRange.lowerBound(0)).onsuccess = function (event) {
                    var cursor = event.target.result;
                    if (null !== cursor) {
                        console.log("entry", cursor.value);
                        cursor.continue();
                    }
                };
            },
            addData = function (db, entry, finished) {
                console.log('adding', entry);
                var tx = db.transaction([store_name], "readwrite"),
                    people = [];
                tx.addEventListener('complete', function (e) {
                    finished();
                });
                $.each(entry.case1, function (key, value) {
                    tx.objectStore(store_name).add(value);
                });
                $(entry.case2).each(function (key, value){
                        people.push(value.husband);
                        people.push(value.wife);                
                });
               ...