JSFiddle - React, Tailwind, and code Playground

by Neeraj Yadav

HTML

<div class="container">
  <button id="btn">Upload</button>
</div>

JavaScript

const btn = document.querySelector("#btn");

btn.addEventListener("click", () => {
  var img = new Image();
  img.onload = function() {
    alert("Width: " + img.width);
  };
  img.src = "http://www.hq.nasa.gov/office/pao/History/alsj/misc/apmisc-60-SAT-1.jpg"
}):