JSFiddle - React, Tailwind, and code Playground
HTML
<input type='file' accept='text/plain' onchange='openFile(event)'>
JavaScript
var openFile = function(event) {
var input = event.target
var reader = new FileReader()
reader.onload = function(e) {
const jsonTxt = e.target.result.toString()
const jsonTxtArray = '[' + jsonTxt + ']'
console.log('obj', JSON.parse(jsonTxtArray))
}
reader.readAsText(input.files[0]);
}