JSFiddle - React, Tailwind, and code Playground

HTML

<div class = "myblock">
  Зажать эту надпись
</div>

<div class = "status">
  Не нажата
</div>

CSS

.myblock{
  color: #fff;
  background-color: #000;
}

JavaScript

var mousePressed = false;

$(".myblock").on("mousedown", function(){
	mousePressed = true;
  $(".status").html("Зажата");
});

$(".myblock").on("mouseup", function(){
	mousePressed = false;
  $(".status").html("Не зажата");
});