JSFiddle - React, Tailwind, and code Playground
HTML
<form action="upload.php" enctype="multipart/form-data" method="POST" id="uploadform">
<input id="openFile" name="img" type="file" />
</form>
JavaScript
$(document).ready(function () {
$('#openFile').on('change', function (evt) {
fr = new FileReader();
fr.readAsDataURL($(this)[0].files[0]);
fr.onload = function(file){
console.log(file);
}
});
});