removeChild()
从DOM树上移除一个元素
removeChild
<div id="parent">
<!-- <p>hello world</p> -->
<div id="good">good</div>
</div>
<script>
var parent = document.getElementById("parent")
var good = document.getElementById("good");
var p =document.createElement("p");
p.innerHTML = "hello world"
/*
appendChild()
给元素增加节点
*/
parent.appendChild(p);
parent.removeChild(good);
</script>
