JSFiddle - React, Tailwind, and code Playground

HTML

<input  type="file"
       id="openselect"
       name="files[]"
       (change)="fileSelect($event)">

JavaScript

openselect.addEventListener("change", fileSelect, false);

function fileSelect(event) {
  const file = event.target['files'][0];
  const fileReader = new FileReader();
  
   fileReader.onload = function() {
     doSomethingWithTheResult(fileReader.result)
  }

  fileReader.readAsText(file); 
}

function doSomethingWithTheResult(result) {
	console.log(result);
	console.log('iamge as blob: ', new Blob([result]))
}