const { JSDOM } = require("jsdom");

const dom = new JSDOM();

const dom = new JSDOM();
const Blob = dom.window.Blob;
const FileReader = dom.window.FileReader;


const textBlob = new Blob(['What is the meaning of life the universe and everything?'], { type: 'text/plain' });
const reader = new FileReader();
reader.onload = (event) => {
   const dataUrl = reader.result;
   console.log( dataUrl);
};
reader.readAsDataURL(textBlob);