<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>datalist</title>
</head>
<body>
<p>
输入框的自动下拉提示：<input list="words">
</p>
<datalist id="words">
<option value="a">
<option value="b">
<option value="c">
<option value="d">
<option value="e">
</datalist>
</body>
</html>