jQuery 使用 <input> 时如何从 select2 中获取选定文本

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时间:2020-08-27 00:39:02  来源:igfitidea点击:

How to get Selected Text from select2 when using <input>

javascriptjqueryknockout-2.0jquery-select2ui-select2

提问by robasta

I am using the select2 control, loading datavia ajax. This requires the use of the <input type=hidden..>tag.

我正在使用 select2 控件,通过 ajax加载数据。这需要使用<input type=hidden..>标签。

Now, I want to retrieve the selected text. (The valueproperty in the data-bindexpression sotres the idonly)

现在,我想检索选定的文本。(表达式中的value属性data-bindsotres the idonly)

I have tried $(".select2-chosen").text(), but this breaks when I have multiple select2 controls on the page.

我试过$(".select2-chosen").text(),但是当我在页面上有多个 select2 控件时,这会中断。

回答by Moeri

As of Select2 4.x, it always returns an array, even for non-multi select lists.

从 Select2 4.x 开始,它总是返回一个数组,即使对于非多选列表也是如此。

var data = $('your-original-element').select2('data')
alert(data[0].text);
alert(data[0].id);

For Select2 3.x and lower

对于 Select2 3.x 及更低版本

Single select:

单选:

var data = $('your-original-element').select2('data');
if(data) {
  alert(data.text);
}

Note that when there is no selection, the variable 'data' will be null.

请注意,当没有选择时,变量 'data' 将为空。

Multi select:

多选:

var data = $('your-original-element').select2('data')
alert(data[0].text);
alert(data[0].id);
alert(data[1].text);
alert(data[1].id);

From the 3.x docs:

从 3.x文档

data Gets or sets the selection. Analogous to val method, but works with objects instead of ids.

data method invoked on a single-select with an unset value will return null, while a data method invoked on an empty multi-select will return [].

data 获取或设置选择。类似于 val 方法,但适用于对象而不是 id。

在具有未设置值的单选上调用的数据方法将返回 null,而在空多选上调用的数据方法将返回 []。

回答by Sol

I finally figured it out doing this:

我终于想通了这样做:

var $your-original-element = $('.your-original-element');
var data = $your-original-element.select2('data')[0]['text'];
alert(data);

if you also want the value:

如果您还想要该值:

var value = $your-original-element.select2('data')[0]['id'];
alert(value);

回答by Lokesh Das

Also you can have the selected value using following code:

您也可以使用以下代码获得选定的值:

alert("Selected option value is: "+$('#SelectelementId').select2("val"));

回答by RahmanRezaee

Used this for show text

用于显示文本

var data = $('#id-selected-input').select2('data'); 
data.forEach(function (item) { 
    alert(item.text); 
})

回答by César Augusto

The code below also solves otherwise

下面的代码也解决了其他问题

.on("change", function(e) {

  var lastValue = e.currentTarget.value;
  var lastText = e.currentTarget.textContent;

 });

回答by rynop

The correct way to do this as of v4 is:

从 v4 开始,正确的方法是:

$('.select2-chosen').select2('data')[0].text

$('.select2-chosen').select2('data')[0].text

It is undocumented so could break in the future without warning.

它没有记录,因此将来可能会在没有警告的情况下中断。

You will probably want to check if there is a selection first however:

但是,您可能需要先检查是否有选择:

var s = $('.select2-chosen');

if(s.select2('data') && !!s.select2('data')[0]){
    //do work
}

回答by Qullbrune

This one is working fine using V 4.0.3

这个使用 V 4.0.3 工作正常

var vv = $('.mySelect2');     
var label = $(vv).children("option[value='"+$(vv).select2("val")+"']").first().html();
console.log(label); 

回答by Vaimeo

Again I suggest Simple and Easy

我再次建议简单易行

Its Working Perfect with ajax when user search and select it saves the selected information via ajax

当用户搜索并选择它时,它与 ajax 完美配合,它通过 ajax 保存所选信息

 $("#vendor-brands").select2({
   ajax: {
   url:site_url('general/get_brand_ajax_json'),
  dataType: 'json',
  delay: 250,
  data: function (params) {
  return {
    q: params.term, // search term
    page: params.page
  };
},
processResults: function (data, params) {
  // parse the results into the format expected by Select2
  // since we are using custom formatting functions we do not need to
  // alter the remote JSON data, except to indicate that infinite
  // scrolling can be used
  params.page = params.page || 1;

  return {
    results: data,
    pagination: {
      more: (params.page * 30) < data.total_count
    }
  };
},
cache: true
},
escapeMarkup: function (markup) { return markup; }, // let our custom    formatter work
minimumInputLength: 1,
}).on("change", function(e) {


  var lastValue = $("#vendor-brands option:last-child").val();
  var lastText = $("#vendor-brands option:last-child").text();

  alert(lastValue+' '+lastText);
 });