JSFiddle - React, Tailwind, and code Playground

HTML

<img src="https://media.giphy.com/media/28dP2nOp55F0Xbdi8E/giphy.gif" class="homer">

<button onclick="restartGif('.homer')">REPEAT</button>

JavaScript

function restartGif(ImageSelector){
  var imgSrc=document.querySelector(ImageSelector).src;
  document.querySelector(ImageSelector).src=imgSrc;
}