JSFiddle - React, Tailwind, and code Playground
by calder12
HTML
<img class="gallery img" src="http://placehold.it/350x150" /><br />
<button id="change">Hi</button>
<label id="imgId"></label>
JavaScript
$("#change").on("click",function(){
i=0;
$('.gallery').attr('id', 'img'+i);
$("#imgId").html($('.gallery').attr('id'));
});