JSFiddle - React, Tailwind, and code Playground

HTML

<button class="knopka" data-target=".block1">Кнопка 1</button>
<button class="knopka" data-target=".block2">Кнопка 2</button>
<button class="knopka" data-target=".block3">Кнопка 3</button>

<div class="block1">Блок 1</div>
<div class="block2">Блок 2</div>
<div class="block3">Блок 3</div>

JavaScript

$(function() {
  $('.knopka').on('click', function() {
		var target = $(this).attr('data-target');
    
    if ($(target).is(':hidden')) {
    	$(target).show(0);
    } else {
      $(target).hide(0);
    }
  });
});