Basic Event Delegation
// Get the element, add a click listener...
document.getElementById("parent-list").addEventListener("click",function(e) {
// e.target is the clicked element!
// If it was a list item
if(e.target && e.target.nodeName == "LI") {
// List item found! Output the ID!
console.log("List item ",e.target.id.replace("post-")," was clicked!");
}
});