console
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=, initial-scale=">
<meta http-equiv="X-UA-Compatible" content="">
<title></title>
</head>
<body>
<form>
<select>
<option value="">请选择：</option>
<option value="">请选择：</option>
<optgroup label="水果">
<option value="apple">苹果</option>
<option value="bannana">猕猴桃</option>
<option value="watermelon">杏子</option>
</optgroup>
<optgroup label="蔬菜">
<option value="xhs">西红柿</option>
<option value="lg">白菜</option>
<option value="dg">油麦菜</option>
</optgroup>
</select>
</form>
</body>
</html>