JSFiddle - React, Tailwind, and code Playground

HTML

<div class='putmehere'></div>
<div class='myhover num1'
     data-text='Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium '>
</div>
<div class='myhover num2' data-text='This is number 2'></div>
<div class='myhover num3' data-text='This is number 3'></div>

CSS

.myhover {
    width: 100px;
    height: 100px;
    background-color: red;
    margin-top: 10px;
}

JavaScript

$( ".myhover" ).hover(
    function(){
               var mytext = $(this).data("text");
               $('.putmehere').html( mytext );
               },
    function(){
               $('.putmehere').html('');
               }
);