Question

我想使用javascript对下拉项目进行排序，任何人都可以告诉我如何执行此操作。

Answer 1

你可以使用jQuery这样的东西：

$("#id").html($("#id option").sort(function (a, b) {
    return a.text == b.text ? 0 : a.text < b.text ? -1 : 1
}))

但问问你为什么以及你想要完成什么可能更好。

Answer 2

<select id="foo" size="10">
  <option value="3">three</option>
  <option value="1">one</option>
  <option value="0">zero</option>
  <option value="2">two</option>
</select>
<script>
  // WARN: won't handle OPTGROUPs!
  var sel = document.getElementById('foo');
  // convert OPTIONs NodeList to an Array
  // - keep in mind that we're using the original OPTION objects
  var ary = (function(nl) {
    var a = [];
    for (var i = 0, len = nl.length; i < len; i++)
      a.push(nl.item(i));
    return a;
  })(sel.options);
  // sort OPTIONs Array
  ary.sort(function(a,b){
    // sort by "value"? (numeric comparison)
    // NOTE: please remember what ".value" means for OPTION objects
    return a.value - b.value;
    // or by "label"? (lexicographic comparison) - case sensitive
    //return a.text < b.text ? -1 : a.text > b.text ? 1 : 0;
    // or by "label"? (lexicographic comparison) - case insensitive
    //var aText = a.text.toLowerCase();
    //var bText = b.text.toLowerCase();
    //return aText < bText ? -1 : aText > bText ? 1 : 0;
  });
  // remove all OPTIONs from SELECT (don't worry, the original
  // OPTION objects are still referenced in "ary") ;-)
  for (var i = 0, len = ary.length; i < len; i++)
    sel.remove(ary[i].index);
  // (re)add re-ordered OPTIONs to SELECT
  for (var i = 0, len = ary.length; i < len; i++)
    sel.add(ary[i], null);
</script>

Answer 3

您可以尝试使用JQuery排序功能 -

Try this

HTML代码 -

<select id="ddlList">
  <option value="3">Three</option>
  <option value="1">One</option>
  <option value="1">one</option>
  <option value="1">a</option>
  <option value="1">b</option>
  <option value="1">A</option>
  <option value="1">B</option>
  <option value="0">Zero</option>
  <option value="2">Two</option>
  <option value="8">Eight</option>
</select>

JQUERY CODE -

$("#ddlList").html($('#ddlList option').sort(function(x, y) {        
     return $(x).text().toUpperCase() < $(y).text().toUpperCase() ? -1 : 1;
}));
$("#ddlList").get(0).selectedIndex = 0;
e.preventDefault();

OR

你也可以使用数组排序 -

Try This

 var options = $('#ddlList option');
 var arr = options.map(function (_, o) { return { t: $(o).text(), v: o.value }; }).get();
 arr.sort(function (o1, o2) { return o1.t.toUpperCase() > o2.t.toUpperCase() ? 1 : o1.t.toUpperCase() < o2.t.toUpperCase() ? -1 : 0; });         
 options.each(function (i, o) {
     o.value = arr[i].v;
     $(o).text(arr[i].t);
 });

Answer 4

将选项值和文本放入数组中，对数组进行排序，然后用从排序数组构造的新元素替换现有选项元素。

Answer 5

依赖于JQUERY

function SortOptions(id) {
    var prePrepend = "#";
    if (id.match("^#") == "#") prePrepend = "";
    $(prePrepend + id).html($(prePrepend + id + " option").sort(
        function (a, b) { return a.text == b.text ? 0 : a.text < b.text ? -1 : 1 })
    );
}

示例：

＆lt; select id =“my-list-id”＆gt;排序依据：

SortOptions("#my-list-id");

OR

SortOptions("my-list-id");

Answer 6

为整个项目下降

$(document).ready(function () {
    $.when($('select').addClass('auto-drop-sort')).then($.fn.sortDropOptions("auto-drop-sort"))
})

/*sort all dropdown*/
$.fn.sortDropOptions = function(dropdown_class){
    var prePrepend = ".";
    if (dropdown_class.match("^.") == ".") prePrepend = "";
    var myParent = $(prePrepend + dropdown_class);
    $.each(myParent, function(index, val) {
        /*if any select tag has this class 'manual-drop-sort' this function wont work for that particular*/
        if ( ! $(val).hasClass('manual-drop-sort') ) {
            var selectedVal = $(val).val()
            $(val).html($(val).find('option').sort(
                function (a, b) {
                    if ( a.value != -1 && a.value != 0 && a.value != '' ) {
                        return a.text == b.text ? 0 : a.text < b.text ? -1 : 1 
                    }
                })
            );
            $(val).val(selectedVal)
        }else{
            /* set custom sort for individual select tag using name/id */
        }
    });
}

Answer 7

提供的答案并不完全适合我的情况，所以我自己编写了一个（特别是不需要jQuery）。认为这可能对其他人有帮助。

sortDropDown(document.querySelector('select'));

function sortDropDown(d){
    //save option values
    var existingOptions=d.options; 

    //keep track of previously selected option
    var selectedOpt=d.selectedOptions[0].value;

    //turn nodeList into Array of values
    existingOptions=[].slice.call(existingOptions).map(function(a){return a.innerText});

    //make sure options are unique
    existingOptions = existingOptions.filter( function(value, index, self) { 
        return self.indexOf(value) === index;
    }); 

    //sort options
    existingOptions.sort();

    //keep "All" option as first element
    existingOptions.splice(0, 0, existingOptions.splice(existingOptions.indexOf('All'), 1)[0]);

    //repleace dropdown contents
    var t='';
    existingOptions.forEach(function(a){
        t+='<option '+(a==selectedOpt?'selected':'')+' value="'+a+'">'+a+'</option>';
    });
    d.innerHTML=t;
}

使用Javascript对下拉列表进行排序

7 个答案: