JavaScript load Image from URL
HTML
<input type="text" value="helloworld" id="imageName"/>
<input type="button" id="insert-btn" value="Insert" />
JavaScript
document.getElementById('insert-btn').onclick = function () {
const val = document.getElementById('imageName').value;
const src = 'https://google.com/images/' + val + '.png';
let imgTag = document.createElement('img');
imgTag.src = src;
document.body.appendChild(imgTag);
}