JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <a href="#" class="a1">Anchor</a>
    <br />
    <br />
    <button class="b1">Button1</button>
    <p>Scroll this page and click on "Button1" to get the co-ordinated of "Anchor"</p>
</div>

CSS

.wrapper{
    height:500px;width:600px;border:1px solid #00ffff;
    padding:50px;    
}

JavaScript

$(document).ready(function(){  
    $(".b1").click(function(){
        var offset = $(".a1").offset();
        alert("(x,y): ("+offset.left+","+offset.top+")");
    });
});