Dom聊天信息的生成原理作业
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
*{margin: 0; padding: 0; list-style: none;}
ul{width: 500px;height: 400px; background: #fafafa; margin: 0; padding: 0;}
ul li{padding: 10px;}
div{width: 500px;height:100px; background: #eee;}
div input{width: 360px; float: left; margin-top: 25px; margin-left: 20px; height:50px; line-height: 50px;padding: 0 10px; border: none;}
div button{width: 80px; margin-top: 25px; height: 50px;line-height: 50px; text-align: center; border: none; background: #ffa200; color: #fff;}
</style>
</head>
<body>
<ul>
</ul>
<div><input type="text" ><button>提交</button></div>
<script type="text/javascript">
let input = document.getElementsByTagName('input')[0];
let button = document.getElementsByTagName('button')[0];
let ul = document.getElementsByTagName('ul')[0];
button.onclick = function(){
let li = document.createElement('li');
li.innerHTML = input.value;
ul.appendChild(li);
input.value='';
}
</script>
</body>
</html>