JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" id="pinchame">pinchame</a>

CSS

body {
    background: gray;
}

JavaScript

function modificar(id_inicio){
    document.getElementById(id_inicio).style.color="white"; 
}

window.onload = function(){
    document.getElementById('pinchame').onclick = function(){
        modificar('pinchame'); 
    }
};