JSFiddle - React, Tailwind, and code Playground

HTML

<a href="http://www.google.com/" tabindex="1">Google</a>
<a href="http://www.microsoft.com/" tabindex="3">Microsoft</a>

CSS

a {
    display: block;
}

JavaScript

var tres = document.querySelector('[tabindex="3"]');
tres.innerHTML = 'Eu tenho tabindex 3';