コツコツ勉強です。
<!DOCTYPE html>
<html>
<head>
<script>
function insertItem() {
var container = document.getElementById("container");
var item = document.createElement("li");
item.textContent = "アイテムにリストを追加";
container.appendChild(item);
}
function removeItem() {
var container = document.getElementById("container");
var item = container.lastChild;
if (item) {
container.removeChild(item);
}
}
</script>
</head>
<body>
<button onclick="insertItem()">insert</button>
<button onclick="removeItem()">delete</button>
<ol id="container"></ol>
</body>
</html>
