JSFiddle - React, Tailwind, and code Playground

HTML

<form id="form1" runat="server">
        <input type='file' id="imgInp" onchange="readURL(this);"/>
        <img id="blah" src="#" alt="your image" />
    </form>

CSS

img {
    width: 300px;
    height: 250px;
}

JavaScript

function readURL(input) {
        if (input.files && input.files[0]) {
            var reader = new FileReader();

            reader.onload = function (e) {
                $('#blah').attr('src', e.target.result);
            }

            reader.readAsDataURL(input.files[0]);
        }
    }