ActivityApp.js

let inp = document.querySelector('input');
let btn = document.querySelector('button');
let ul =  document.querySelector('ul');
let li = document.querySelector('li');

btn.addEventListener("click", function(){
    let item = document.createElement("li");
    item.innerText = inp.value;

    let delBtn = document.createElement('button');
    delBtn.innerText = "delete";
    delBtn.classList.add("delete");

    item.appendChild(delBtn);
    ul.appendChild(item);
    inp.value ="";
});

ul.addEventListener("click", function(event) {
    if (event.target.nodeName == 'BUTTON'){
        let listItem = event.target.parentElement;
        listItem.remove();
        console.log("delete");
    }
});

// let delBtns = document.querySelectorAll('.delete');

// for(delBtn of delBtns){
//     delBtn.addEventListener("click",function() {
//         let par = this.parentElement;
//         par.remove();
//     })
// }