JSFiddle - React, Tailwind, and code Playground

HTML

<div class="chapcontainer" data-chaporder="1000">
   <div class="chapter">Big fire</div>
     <div class="subchapter" data-chapid="1">Forest burning</div>
     <div class="subchapter" data-chapid="2">Balu hoses</div>
     <div class="subchapter" data-chapid="3">Forest animals die</div>
     <div class="subchapter" data-chapid="4">Lovely fire</div>
   <!-- </div> -->
</div>

JavaScript

$(".subchapter[data-chapid='1']").on("click", function() {
	$(this).css('margin-left', '20px')
})