<body>
<input id="input" type="text" name="" id="">
<button onclick="addContent()">添加</button>
<ul id="ul"></ul>
<script>
function addContent() {
let ul = document.getElementById('ul')
let li = document.createElement('li');
li.appendChild(document.createTextNode(document.getElementById('input').value))
let mybutton = document.createElement('input');
mybutton.type = "button";
mybutton.value = "删除";
mybutton.onclick = function () {
deleteLi(lis.length);
}
li.appendChild(mybutton)
ul.appendChild(li)
document.getElementById('input').value = "";
}
function deleteLi(index) {
let ul = document.getElementById('ul');
ul.removeChild(ul.childNodes[index - 1]);
}
</script>
</body>
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