JSFiddle - React, Tailwind, and code Playground

HTML

<table id="tablica"> 
    <thead> 
        <th id="bla">Bla</th> 
        <th id="bli">Bli</th> 
        <th id="blu">Blu</th> 
    </thead> 
    <tbody> 
        <tr id="jedan"> 
            <td>1</td>             
            <td>2</td> 
            <td>3</td> 
        </tr> 
        <tr id="dva"> 
            <td>4</td>             
            <td>5</td> 
            <td>6</td> 
        </tr> 
        <tr id="tri"> 
            <td>7</td>             
            <td>8</td> 
            <td>9</td> 
        </tr> 
    </tbody> 
</table>

JavaScript

var column = $('#bli').index();
var cell = $('#dva').find('td').eq(column);

alert(cell.html());