JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li id="1">Link 1</li>
    <li id="2">Link 2</li>
    <li id="3">Link 3</li>
    <li id="4">Link 4</li>
    <li id="5">Link 5</li>
</ul

JavaScript

var li = document.getElementsByTagName("li");

for(var i = 0;i<li.length;i++){
    li[i].addEventListener("click", myScript);
}

function myScript(e){
    alert(e.target.attributes.id.value);       
}