JSFiddle - React, Tailwind, and code Playground

HTML

<div id="grid">
  <div class="cell">
  </div>

  <div class="cell">
  </div>

  <div class="cell">
  </div>

  <div class="cell">
  </div>
</div>

CSS

#grid {
  display: grid;
  grid-template-columns: auto auto;
  grid-gap: 2px;
  width: 500px;
  height: 500px;
}

.cell{
  background: grey;
  grid-row: 1 / 2;
}

JavaScript

$(function(){
	console.log($(".cell").first().css("grid-row"));
})