JSFiddle - React, Tailwind, and code Playground

HTML

<div id="page-wrapper">
    <ul id="resultMessage"></ul>
    <hr>
    <ul id="log-items"></ul>
</div>

CSS

body {
    font-family: verdena, sans-serif;
    background-color: whitesmoke;
}
ul {
    list-style-type: none;
    padding: 0px;
    margin: 0px;
}
#resultMessage, #log-items {
    white-space:pre-wrap;
}

JavaScript

var logUL = document.getElementById("log-items");
var resultMessage = document.getElementById("resultMessage");

function Log(txt) {
    var li = document.createElement('li');
    li.appendChild(document.createTextNode(txt));
    logUL.appendChild(li);
}

function LogResult(txt) {
    var li = document.createElement('li');
    li.appendChild(document.createTextNode(txt));
    resultMessage.appendChild(li);
}
var request = window.indexedDB.open("C01TestDatabase", 2);
Log('open"C01TestDatabase" done');

request.onerror = function (event) {
    console.log("onerror");
    Log("request.onerror");
};

request.onsuccess = function (event) {
    Log('Enter "request.onsuccess"');
    var db = event.target.result;
    var transaction = db.transaction(['customers'], 'readonly');
    var store = transaction.objectStore('customers');
    var index = store.index("name_age");
    LogResult('Start search for persons named Bill of age 32:');

//    var cursorRequest = index.openCursor(['Bill', 32]);
   	var range = IDBKeyRange.only(['Bill',32]);
    var cursorRequest = index.openCursor(range);
    cursorRequest.onsuccess = function (event) {
        var cursor = event.target.result;
        if (cursor) {
            LogResult(" Name for SSN " + cursor.value.ssn + " is " + cursor.value.name + " Age: " + cursor.value.age);
            cursor.continue();
        } else {
            LogResult(" -- No more entries --");
        }
    };

};

request.onupgradeneeded = function (event) {
    Log('Enter "request.onupgradeneeded"');

    var db = event.target.result;
    if (db.objectStoreNames.contains('customers')) {
        db.deleteObjectStore('customers');
    }
    var objectStore = db.createObjectStore("customers", {
        keyPath: "ssn"
    });
    objectStore.createIndex("name", "name", {
        unique: false
    });
    objectStore.createIndex("email", "email", {
        unique: true
    });
    objectStore.createIndex("name_email", ["name", "email"], {
        unique:...