エンティティノードの追加と削除(innerText、append、remove)

    <section id="section6">
        <h1>Ex6-노드조작: 메뉴추가(createTextNode, Element) </h1>
        <div>
            <input class="title-input" name="title">
           <input type="button" class="add-button" value="추가하기">
           <input type="button" class="del-button" value="삭제하기">
        </div>
        <ul class="menu-list">
           <li><a href="">aaa</a></li>
           <li><a href="">bbb</a></li>
        </ul>
    </section>

//Ex6 : 
window.addEventListener("load", function () {
    var section = document.querySelector("#section6");

    var titleInput = section.querySelector(".title-input");
    var menuListUl = section.querySelector(".menu-list")
    var addButton = section.querySelector(".add-button");
    var delButton = section.querySelector(".del-button");

    addButton.onclick = function () {
        var title = titleInput.value;

        var html = '<a href="">'+ title +'</a>'; 
        //태그안에 title을 저장하는 방법
        
        var li = document.createElement("li");
        li.innerHTML = html;//<a>안의 title을 <li>로 감싸기.

        menuListUl.append(li);
    };
    delButton.onclick = function () {
        // var txtNode = menuListDiv.childNodes[0]
        // menuListUl.removeChild(txtNode); 부모를 사용한 삭제.
        
        var liNode = menuListUl.children[0]; //스스로를 삭제.
        liNode.remove();
    };
});