JSFiddle - React, Tailwind, and code Playground

HTML

<img src="broken" alt="A broken image">

CSS

img {  
position: relative;
}

/* style this to fit your needs */
/* and remove [alt] to apply to all images*/
img[alt]:after {  
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #fff;
  content: attr(alt);
}