JSFiddle - React, Tailwind, and code Playground

HTML

<input type="file" id="files_input" multiple/>

JavaScript

function openFiles(evt){
    var files = evt.target.files;
    for (var i = 0; i < files.length; i++) {
      var file=files[i];
      reader = new FileReader();
      reader.onload = (function(file){
          console.log(file)
      })(file);
      reader.readAsText(file);
    }
  }

$(function() {
  files_input.addEventListener("change", openFiles, false);
});