JSFiddle - React, Tailwind, and code Playground

HTML

<input id='input' type="text" value="https://annadannfelt.files.wordpress.com/2015/02/th.jpeg">

<img id='img' src='https://annadannfelt.files.wordpress.com/2015/02/th.jpeg' alt='SUPERMEN'>

JavaScript

function getsrc(){
	var src = document.getElementById('input');
	var img = document.getElementById('img');
  img.src = src.value;
  console.log(src.value);
}

document.getElementById('input').onkeyup = getsrc;