问而不添加任何值li自动创建

EN

const form = document.querySelector('#task-form');
const filter = document.querySelector('#filter');
const taskList = document.querySelector('.collection');
const taskInput = document.querySelector('#task');
const clearBtn = document.querySelector('.clear-tasks');

function loadEventListeners(){
    form.addEventListener('submit', addTask);
    taskList.addEventListener('click', removeTask);
    clearBtn.addEventListener('click',clearTasks);
    filter.addEventListener('keyup', filterLi)
}

function addTask(e){
    if(taskInput.value ===''){
        alert('Please Add Task');
    }
    const li = document.createElement('li');
    li.className = 'collection-item';
    li.appendChild(document.createTextNode(taskInput.value));
    const link = document.createElement('a');
    link.className = 'delete-item secondary-content';
    link.innerHTML = '<i class="fa fa-remove"></i>'
    li.appendChild(link);
    taskList.appendChild(li);
    taskInput.value="";
    e.preventDefault(); 
}