JSFiddle - React, Tailwind, and code Playground

HTML

Sem error
<br/>
<img src="http://previews.123rf.com/images/otnaydur/otnaydur1103/otnaydur110300040/9112843-Gold-coins-stack-over-scater-coins-Stock-Photo-bar.jpg" alt="Olá Mundo" onerror="this.onerror=null;this.src='http://logz.io/wp-content/uploads/2016/02/stack-overflow-logo.png';"
/>
<br/>Com error
<br/>
<img src="loading.gif" alt="Olá Mundo" onerror="this.src='http://logz.io/wp-content/uploads/2016/02/stack-overflow-logo.png';" />

CSS

img {
      width: 200px;
      height: 200px;
    }