JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" class="green">Green</a>
<a href="#" class="red">Red</a>
<a href="#" class="blue">Blue</a>

JavaScript

var colors = ['green', 'red', 'blue'];

for(var i=0; i<colors.length; i++) {
    document.getElementsByClassName(colors[i])[0].onclick = function() {
        alert(colors[i]);
    };
}