JSFiddle - React, Tailwind, and code Playground
HTML
<div class="inputField_1">
<input id="urlInput" type="text"/><br>
<input type="submit" id="submitUrl"/>
</div>
<div class="aboutTitleWrap"></div>
JavaScript
$("#submitUrl").on("click", function(){
var urlInput = $("#urlInput").val();
var img = new Image();
img.src = urlInput
var width = img.width;
var height = img.height;
$(".aboutTitleWrap").append("<p>This image has: " + width*height + " pixels</p>");
});