JSFiddle - React, Tailwind, and code Playground

HTML

<div class="board">
      <div class="field">
        <div class="circle" data-text="Dupa">

        </div>
      </div>
      <div class="field">
        <div class="circle">

        </div>
      </div>
      <div class="field">
        <div class="circle">

        </div>
      </div>
      <div class="field">
        <div class="circle">

        </div>
      </div>
      <div class="field">
        <div class="circle">

        </div>
      </div>
      <div class="field">
        <div class="circle">

        </div>
      </div>
      <div class="field">
        <div class="circle">

        </div>
      </div>
      <div class="field">
        <div class="circle">

        </div>
      </div>
      <div class="field">
        <div class="circle">

        </div>
      </div>
    </div>

CSS

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 10px;
}

body {
  display: flex;
  justify-content: center;
  font-size: 2rem;
  padding: 0;
  margin: 0;
  background-color: hotpink;
}

@media (min-width: 600px) {
  body {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
  }
}

.board {
  display: flex;
  width: 100vh;
  height: 100vh;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.field {
  width: 33.33%;
  height: 33.33%;
  display: flex;
  flex: 0 0 33.33%;
  padding: 5px;
}

.circle {
  background-color: orange;
  border-radius: 50%;
  width: 100%;
  height: 100%;
}

.hide {
  display: none;
}

JavaScript

var circle = document.querySelectorAll(".circle");

  for(i=0; i<circle.length; i++){

    circle[i].addEventListener("click", function(){
      this.classList.toggle("hide");
      console.log(circle.indexOf(this));
    })
  }