聊天信息的生成原理
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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<input type="text" name="info">
<button style="color:coral;">提交</button>
<ul></ul>
<script>
let input = document.getElementsByName('info')[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.insertBefore(li,null);
input.value = '';
}
</script>
</body>
</html>