let list = document.querySelector(".list");
list.onclick=function(event){
event=event ||window;
const target=event.teret;
console.log(target)
if(target.nodeName === 'LI'){
console.log(target.innerHTML)
}
}
<ul class="list">
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
</ul>