JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/localforage/1.7.3/localforage.js"></script>

JavaScript

localforage.setItem('testKey', 'testValue', function() {
  var value = getValue('testKey');

  console.log(value); // here I get undefined, but I want to get a value
});

async function getValue(key) { 
  var result = await localforage.getItem(key);
  return result;
}