DOM Changing elements
 <div id='countries'>
  <div id='fr'>
	<div>France</div>
	<img src='flags/fr.gif'/>
  </div>
  <div id='fi'>
	<div>Finland</div>
	<img src='flags/fi.gif'/>
  </div>
 </div>
Create Content
You can create a div element an set the content.
We use the document method createElement and the DOM node method append
let e = document.createElement('div');
e.innerHTML = 'Hello';
document.body.append(e);
let e = document.createElement('div');
e.innerHTML = 'Hello world';
document.body.append(e);
Create img
You can create a img element an set the src. In this example you must set the src and the style of the new element a.
a.style = 'width:100px;border:solid;';
These are CSS properties.
let a = document.createElement('img');
a.src = '/flags/fr.png';
document.body.append(a);
let a = document.createElement('img');
a.src = '/flags/fr.png';
a.style = 'width:100px;border:solid;';
document.body.append(a);