发表新帖
发表新帖

Multiple Select limit number of selection

后端 未结
关注
5 1391
無奈伤痛
無奈伤痛 2020-12-01 04:48

I want user to select maximum of only three options from multiple select options. I tried this code so far:
提交评论
  •  加载中...
  • Happy的楠姐
    2020-12-01 05:13

    You are using this inside change event, which is reference to select.

    Try this:

    $("select").on('click', 'option', function() {
    if ($("select option:selected").length > 3) {
        $(this).removeAttr("selected");
        // alert('You can select upto 3 options only');
    }
});

    Demo: http://jsfiddle.net/tusharj/tmkzebnj/

    EDIT

    $("select").on('change', function(e) {
    if (Object.keys($(this).val()).length > 3) {
        $('option[value="' + $(this).val().toString().split(',')[3] + '"]').prop('selected', false);
    }
});

    Demo: http://jsfiddle.net/tusharj/tmkzebnj/1/

    0 讨论(0)
  • 挽巷
    2020-12-01 05:14

    Try this...

    Check length and deselect after reach maximum select

    <select id="userRequest_activity" required name="activity[]" class="multiselect form-control" multiple="multiple">
    <option value="2">Bungee Jumping</option>
    <option value="3">Camping</option>
    <option value="5">Mountain Biking</option>
    <option value="6">Rappelling</option>
    <option value="7">Rock Climbing / Bouldering</option>
    <option value="8">Skiing</option>
    <option value="10">Wild Life (Safari)</option>
    <option value="11">Canoeing &amp; Kayaking</option>
    <option value="12">Rafting</option>
    <option value="13">Sailing</option>
    <option value="14">Scuba Diving</option>
    <option value="15">Snorkeling</option>
    <option value="16">Surfing</option>
    <option value="18">Hang Gliding</option>
    <option value="19">Hot-air Ballooning</option>
    <option value="20">Micro-light Aircrafts</option>
    <option value="21">Paragliding</option>
    <option value="22">Paramotoring</option>
    <option value="23">Parasailing</option>
    <option value="24">Skydiving / Parachuting</option>
    <option value="25">Zip-line / Flying Fox</option>
    <option value="26">Caving</option>
    <option value="27">Cycling</option>
    <option value="28">Fishing &amp; Angling</option>
    <option value="29">Motorbike trips</option>
    <option value="30">Nature Walks</option>
    <option value="31">Road Trips</option>
    <option value="32">Zorbing</option>
    <option value="33">Trekking Hiking and Mountaineering</option>
    <option value="34">Backpacking</option>
    <option value="61">Water</option>
</select>

    <script type="text/javascript">


        $(document).ready(function() {

          var last_valid_selection = null;

          $('#userRequest_activity').change(function(event) {

            if ($(this).val().length > 3) {

              $(this).val(last_valid_selection);
            } else {
              last_valid_selection = $(this).val();
            }
          });
        });
        </script>

    DEMO:http://jsfiddle.net/9c3sevuv/

    0 讨论(0)
  • 温柔的废话
    2020-12-01 05:15

    Try this Fiddle.

    $("select option").click(function() {
    if ($("select option:selected").length > 3) {
        $(this).removeAttr("selected");
        alert('You can select upto 3 options only');
    }
});
    0 讨论(0)
  • 囚心锁ツ
    2020-12-01 05:33

    Try this

    $("select").change(function() {
    if($("select option:selected").length > 3) { 
     alert('You can select upto 3 options only');
     $(this).removeAttr("selected");
  }

});

    DEMO

    0 讨论(0)
    •  看不清?
    提交回复
    热议问题