select2 값을 재설정하고 자리 표시 자 표시

select2 값을 재설정하고 자리 표시 자 표시

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select2로 자리 표시자를 값 재설정시 설정하는 방법 예제에서 위치 또는 등급 선택 상자를 클릭하고 select2의 값이 select2의 값보다 큰 경우 기본 자리 표시자를 재설정하고 표시해야합니다. 이 스크립트는 값을 재설정하지만 자리 표시자를 표시하지 않습니다

$("#locations, #grade ").change(function() {
   $('#e6').select2('data', {
     placeholder: "Studiengang wählen",
     id: null,
     text: ''
   });
});

$("#e6").select2({
   placeholder: "Studiengang wählen",
   width: 'resolve',
   id: function(e) {
     return e.subject;
   },
   minimumInputLength: 2,
   ajax: {
     url: "index.php?option=com_unis&task=search.locator&tmpl=component&<?php echo JSession::getFormToken() ?>=1",
     dataType: 'json',
     data: function(term, page) {
       return {
         q: term, // search term
         g: $('#grade option:selected').val(),
         o: $('#locations option:selected').val()
       };
     },
     results: function(data, page) {
       return {
         results: data
       };
     }
   },
   formatResult: subjectFormatResult,
   formatSelection: subjectFormatSelection,
   dropdownCssClass: "bigdrop",
   escapeMarkup: function(m) {
     return m;
   }
});

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select2를 다음과 같이 정의해야합니다.

$("#customers_select").select2({
    placeholder: "Select a customer",
    initSelection: function(element, callback) {                   
    }
});

select2를 재설정하려면

$("#customers_select").select2("val", "");

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Select2가 API를 변경했습니다.

Select2 :이 select2("val")방법은 더 이상 사용되지 않으며 추후 Select2 버전에서 제거됩니다. 대신 $ element.val ()을 사용하십시오.

가장 좋은 방법은 다음과 같습니다.

$('#your_select_input').val('');

편집 : 2016 년 12 월 의견은 아래가 업데이트 된 방법임을 제안합니다.

$('#your_select_input').val([]);

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제 경우에는 허용 된 답변이 작동하지 않습니다. 나는 이것을 시도하고 있으며 효과가있다.

select2를 정의하십시오.

$("#customers_select").select2({
    placeholder: "Select a State",
    allowClear: true
});

또는

$("#customers_select").select2({
    placeholder: "Select a State"
});

재설정하려면

$("#customers_select").val('').trigger('change')

또는

$("#customers_select").empty().trigger('change')

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나를 위해 일할 수있는 유일한 것은 :

$('select2element').val(null).trigger("change")

버전 4.0.3을 사용하고 있습니다.

참고

Select2 설명서에 따르면

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Select2는 특정 CSS 클래스를 사용하므로이를 재설정하는 쉬운 방법은 다음과 같습니다.

$('.select2-container').select2('val', '');

또한 동일한 형식으로 여러 Select2가있는 경우이 단일 명령으로 모두 재설정됩니다.

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이것을 사용하십시오 :

$('.select').val([]).trigger('change');

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선택한 값을 제거하려면

$('#employee_id').select2('val','');

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옵션 값을 지우려면

$('#employee_id').html('');

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나는 이것이 오래된 질문이라는 것을 알고 있지만 이것은 select2 버전 4.0에서 작동합니다.

 $('#select2-element').val('').trigger('change');

또는

$('#select2-element').val('').trigger('change.select2'); 

변경 이벤트가 바인딩 된 경우

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다음을 사용하여 select2를 구성하십시오.

    $('#selectelementid').select2({
        placeholder: "Please select an agent",
        allowClear: true // This is for clear get the clear button if wanted 
    });

프로그래밍 방식으로 선택 입력을 지우려면

    $("#selectelementid").val("").trigger("change");
    $("#selectelementid").trigger("change");

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이것은 올바른 방법입니다.

 $("#customers_select").val('').trigger('change');

최신 릴리스의 Select2를 사용하고 있습니다.

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먼저 다음과 같이 select2를 정의해야합니다.

$('#id').select2({
    placeholder: "Select groups...",
    allowClear: true,
    width: '100%',
})

select2를 재설정하려면 다음 코드 블록을 사용하면됩니다.

$("#id > option").removeAttr("selected");
$("#id").trigger("change");

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원격 데이터를로드하는 사용자의 경우 이것은 ajax를 발생시키지 않고 select2를 플레이스 홀더로 재설정합니다. v4.0.3에서 작동 :

$("#lstProducts").val("").trigger("change.select2");

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당신은에 의해 선택을 취소 할 수 있습니다

$('#object').empty();

But it wont turn you back to your placeholder.

So its a half solution

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I tried the above solutions but it didn't work for me.

This is kind of hack, where you do not have to trigger change.

$("select").select2('destroy').val("").select2();

or

$("select").each(function () { //added a each loop here
        $(this).select2('destroy').val("").select2();
});

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Following the recommended way of doing it. Found in the documentation https://select2.github.io/options.html#my-first-option-is-being-displayed-instead-of-my-placeholder (this seems to be a fairly common issue):

When this happens it usually means that you do not have a blank <option></option> as the first option in your <select>.

as in:

<select>
   <option></option>
   <option value="foo">your option 1</option>
   <option value="bar">your option 2</option>
   <option value="etc">...</option>
</select>

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I was also having this problem and it stems from val(null).trigger("change"); throwing a No select2/compat/inputData error before the placeholder gets reset. I solved it by catching the error and setting the placeholder directly (along with a width). Note: If you have more than one you will need to catch each one.

try{
    $("#sel_item_ID").select2().val(null).trigger("change");
}catch(err){
    console.debug(err)
}
try{
    $("#sel_location_ID").select2().val(null).trigger("change");
}catch(err){
    console.debug(err)
}
$('.select2-search__field')[0].placeholder='All Items';
$('.select2-search__field')[1].placeholder='All Locations';
$('.select2-search__field').width(173);

I'm running Select2 4.0.3

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With Select2 version 4.0.9 this works for me:

$( "#myselect2" ).val('').trigger('change');

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So, to reset the form some of you will have a reset button. Add the following code inside the script tag

$('.your_btn_class').click(function(){
    $('#select_field_id').val([]);
    $("#select_field_id").select2({
    placeholder: "this is a placeholder",
    });
});

Or just to empty select field without keeping a placeholder:

$('.your_btn_class').click(function(){
    $('#select_field_id').val([]);
 });

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I have tried above solutions but none worked with version 4x.

What i want to achieve is: clear all options but don't touch the placeholder. This code works for me.

selector.find('option:not(:first)').remove().trigger('change');

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Using select2 version 3.2 this worked for me:

$('#select2').select2("data", "");

Didn't need to implement initSelection

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as of v.4.0.x...

to clear the values, but also restore the placeholder use...

.html('<option></option>');  // defaults to placeholder

if it's empty, it will select the first option item instead which may not be what you want

.html(''); // defaults to whatever item is first

frankly...Select2 is such a pain in the butt, it amazes me it hasn't been replaced.

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For the place holder

$("#stateID").select2({
    placeholder: "Select a State"
});

To reset a select 2

$('#stateID').val('');
$('#stateID').trigger('change');

Hope this helps

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Before you clear the value using this $("#customers_select").select2("val", ""); Try setting focus to any other control on reset click.

This will show the placeholder again.

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The DOM interface, already keeps track of the initial state...

So doing the following is enough:

$("#reset").on("click", function () {
    $('#my_select option').prop('selected', function() {
        return this.defaultSelected;
    });
});

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Well whenever I did

$('myselectdropdown').select2('val', '').trigger('change');

I started getting some kind of lag after some three to four triggers. I suppose there's a memory leak. Its not within my code because if I do remove the this line, my app is lag free.

Since I have allowClear options set to true, I went with

$('.select2-selection__clear').trigger('mousedown');

This can be followed by a $('myselectdropdown').select2('close'); event trigger on the select2 dom element in case you wanna close the open suggestion drop down.

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One [very] hacky way to do it (I saw it work for version 4.0.3):

var selection = $("#DelegateId").data("select2").selection;
var evt = document.createEvent("UIEvents");
selection._handleClear(evt);
selection.trigger("toggle", {});

• allowClear must be set to true
• an empty option must exist in the select element

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After trying the first 10 solutions here and failing, I found this solution to work (see "nilov commented on Apr 7 • edited" comment down the page):

(function ($) {
   $.fn.refreshDataSelect2 = function (data) {
       this.select2('data', data);

       // Update options
       var $select = $(this[0]);
       var options = data.map(function(item) {
           return '<option value="' + item.id + '">' + item.text + '</option>';
       });
       $select.html(options.join('')).change();
   };
})(jQuery);

The change is then made:

var data = [{ id: 1, text: 'some value' }];
$('.js-some-field').refreshDataSelect2(data);

(The author originally showed var $select = $(this[1]);, which a commenter corrected to var $select = $(this[0]);, which I show above.)

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My solution is:

$el.off('select2:unselect')
$el.on('select2:unselect', function (event) {
    var $option = $('<option value="" selected></option>');
    var $selected = $(event.target);

    $selected.find('option:selected')
             .remove()
             .end()
             .append($option)
             .trigger('change');
    });

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$('myselectdropdown').select2('val', '0')

where 0 is your first value of the dropdown

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Use this code into your js file

$('#id').val('1');
$('#id').trigger('change');

참고URL : https://stackoverflow.com/questions/17957040/reset-select2-value-and-show-placeholder