• Walk the dog


• Pay bills


• Make dinner


• Code for one hour

'use strict';
document.addEventListener('DOMContentLoaded', function() {

let app = document.getElementById('todo-app');
let items = app.getElementsByClassName('item');

//将事件侦听器绑定到每个列表项
for(let item of items){

item.addEventListener('click', function(){ alert('you clicked on item: ' + item.innerHTML); });

}

});

我这这样写的，有什么问题吗