如何动态地复制转换为select2.js的选择标记?

时间:2019-02-19 23:44:15

标签: javascript html jquery-select2

我正在尝试在项目中使用select2

在以下屏幕截图中,我想在用户单击select2按钮之后动态地复制社交媒体部分(包括inputremove btnADD More):

enter image description here

为避免冲突,我在点击事件开始时为所有destroy调用了select2事件。然后,我将复制元素。然后,我将重新初始化select2。但是,它始终只会将一个选择转换为select2

在以下屏幕截图中,您可以看到重复的选择未转换为select2

enter image description here

以下代码段显示了问题:

<!doctype html>
<html lang="en">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.6-rc.0/css/select2.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.6-rc.0/js/select2.min.js"></script>
</head>
<body>
<button onclick="duplicate_select();">duplicate</button>
<br/><br/>
<select class="selection" name="state">
  <option value="AL">Alabama</option>
  <option value="WY">Wyoming</option>
</select>

<script>
$(document).ready(function() {
    $('.selection').select2();
});

function duplicate_select ()
{
    //Destroy all active select2
    $(".selection").each(function (index, value) {
        var temp_selecte2 = $(value).select2();
        temp_selecte2.select2('destroy');
    });

    //Get First Select Node that I want to duplicate
    var first_node = $('.selection').first().prop('outerHTML');
    
    //Add new node to the body
    $('body').append(first_node);
    
    
    //Re-initialize all select2
    $(".selection").each(function (index, value) {
        var temp = $(value).select2();
        //temp.select2();
    });
    
    //Following codes is not working too
    //$(".selection").select2();
}
</script>

</body>
</html>

能否请您指导我如何解决此问题并重新初始化所有重复的选择元素?

1 个答案:

答案 0 :(得分:2)

发生此问题是因为Select2要求select标记必须唯一,select2()方法通过使用名为data-select2-id的属性来识别此标记,您唯一要做的就是修改属性。

可以通过删除属性或设置唯一属性来解决您的问题。要设置唯一行,只需添加行temp.attr('data-select2-id', new Date().getTime()),但建议的方法是删除行temp.removeAttr('data-select2-id')

<!doctype html>
<html lang="en">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.6-rc.0/css/select2.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.6-rc.0/js/select2.min.js"></script>
</head>
<body>
<button onclick="duplicate_select();">duplicate</button>
<br/><br/>
<select class="selection" name="state">
  <option value="AL">Alabama</option>
  <option value="WY">Wyoming</option>
</select>

<script>
$(document).ready(function() {
    $('.selection').select2();
});

function duplicate_select ()
{
    //Destroy all active select2
    $(".selection").each(function (index, value) {
        var temp_selecte2 = $(value).select2();
        temp_selecte2.select2('destroy');
    });

    //Get First Select Node that I want to duplicate
    var first_node = $('.selection').first().prop('outerHTML');
    
    //Add new node to the body
    $('body').append(first_node);
    
    
    //Re-initialize all select2
    $(".selection").each(function (index, value) {
        var temp = $(value);
        temp.removeAttr('data-select2-id');
        // temp.attr('data-select2-id', new Date().getTime()); // <-- this works too
        temp.select2();
    });
}
</script>

</body>
</html>