JS实现根据英文字母排序


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/jquery-2.1.4.min.js"></script>
</head>
<body>
<select id="myselect" size="5">
    <option>E</option>
    <option>D</option>
    <option>C</option>
    <option>A</option>
    <option>B</option>
</select>
<script>
    var options={};
    $('#myselect option').each(function(){
        var option = $(this);
        options[option.text()] = option;
    });
    var keys = Object.keys(options).sort();//排序
    var $myselect = $('#myselect').empty();//移除所有内容
    $.each(keys,function(i,key){
        $myselect.append(options[key]);
    });
    
</script>
</body>
</html>