我想按字母顺序对select2选项进行排序。我有以下代码,想知道如何实现:
<select name="list" id="mylist" style="width:140px;">
<option>United States</option>
<option>Austria</option>
<option>Alabama</option>
<option>Jamaica</option>
<option>Taiwan</option>
<option>canada</option>
<option>palau</option>
<option>Wyoming</option>
</select>
$('#mylist').select2({
sortResults: function(results) { return results.sort(); }
});
我想通过“文本”对数据进行排序。
sortResults
)您可以使用sortResults
callback选项对元素进行排序String.localeCompare()
:
$( '#mylist' ).select2({
/* Sort data using localeCompare */
sortResults: data => data.sort((a, b) => a.text.localeCompare(b.text)),
});
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/3.5.4/select2.min.css" integrity="sha256-ijlUKKj3hJCiiT2HWo1kqkI79NTEYpzOsw5Rs3k42dI=" crossorigin="anonymous" /><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/select2/3.5.4/select2.min.js" integrity="sha256-7A2MDY2eGSSUvgfbuH1IdzYk8qkEd3uzwiXADqPDdtY=" crossorigin="anonymous"></script>
<select name="list" id="mylist" style="width:140px;">
<option>United States</option>
<option>Austria</option>
<option>Alabama</option>
<option>Jamaica</option>
<option>Taiwan</option>
<option>canada</option>
<option>palau</option>
<option>Wyoming</option>
</select>
sorter
)您可以使用sorter
回调选项对元素进行排序:
$('#mylist').select2({
sorter: data => data.sort((a, b) => a.text.localeCompare(b.text)),
});
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.5/css/select2.css" integrity="sha256-xqxV4FDj5tslOz6MV13pdnXgf63lJwViadn//ciKmIs=" crossorigin="anonymous" /><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.5/js/select2.min.js" integrity="sha256-FA14tBI8v+/1BtcH9XtJpcNbComBEpdawUZA6BPXRVw=" crossorigin="anonymous"></script>
<select name="list" id="mylist" style="width:140px;">
<option>United States</option>
<option>Austria</option>
<option>Alabama</option>
<option>Jamaica</option>
<option>Taiwan</option>
<option>canada</option>
<option>palau</option>
<option>Wyoming</option>
</select>
我有另一种通用方法(可以使用值或属性对元素进行排序),而无需使用jQuery:
var select = document.getElementById("mylist");
var options = [];
// Get elements to sort
document.querySelectorAll('#mylist > option').forEach(
option => options.push(option)
);
// Empty select
while (select.firstChild) {
select.removeChild(select.firstChild);
}
// Sort array using innerText (of each option node)
options.sort(
(a, b) => a.innerText.localeCompare(b.innerText)
);
// Add the nodes again in order
for (var i in options) {
select.appendChild(options[i]);
}
<select name="list" id="mylist" style="width:140px;">
<option>United States</option>
<option>Austria</option>
<option>Alabama</option>
<option>Jamaica</option>
<option>Taiwan</option>
<option>canada</option>
<option>palau</option>
<option>Wyoming</option>
</select>
感谢@Narendra Sisodia的jQuery技巧:
/* Get options */
var selectList = $('#mylist > option');
/* Order by innerText (case insensitive) */
selectList.sort(
(a, b) => a.innerText.localeCompare(b.innerText)
);
/* Re-do select HTML */
$('#mylist').html(selectList);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>
<select name="list" id="mylist" style="width:140px;">
<option>United States</option>
<option>Austria</option>
<option>Alabama</option>
<option>Jamaica</option>
<option>Taiwan</option>
<option>canada</option>
<option>palau</option>
<option>Wyoming</option>
</select>
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