<div>
  <h4>Image With Good `src` url </h4>
 <img src="https://upload.wikimedia.org/wikipedia/commons/7/7f/Contour_buffer_strips_NRCS.jpg" />
  <hr/>
</div>


<div>
<h4>Same Image With Bad `src` url without fallback</h4>
<img src="https://images.unsplash.com/photo-1509994320249-7c2fcb1?auto=format&fit=crop&w=636&q=80" alt="Broken Image"/>
    <hr/>
</div>


<div>
  <h4>Same Image With Bad `src` url but with Fallback provided</h4>
<img src="https://images.unsplash.com/photo-1509994320249-7c2fcb1?auto=format&fit=crop&w=636&q=80" 
     onerror="this.onerror = null; this.src = 'https://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Yangshuo_moon_hill.jpg/220px-Yangshuo_moon_hill.jpg'"/>
</div>