JSFiddle - React, Tailwind, and code Playground

HTML

<input id="fileupload" name="file" type="file" />
    <div></div>

JavaScript

document.querySelector('#fileupload').addEventListener('change', function(){
        var fr = new FileReader();
        fr.onload = function(){
            document.querySelector('div').innerHTML = this.result;
        }
        fr.readAsText(this.files[0]);
    });