如何在 jquery 中的 select 更改中获取 selected 选项的数据值

Question

我的html语法如下

<select id="category" name="category">
  <option value="0">Please Select</option>
  <option value="50" data-value="akne">ACNE</option>
  <option value="11" data-value="rednessbumps">Redness / Bumps</option>
  <option value="15" data-value="sunspotsfreckles">Sunspots / Freckles</option>
  <option value="16" data-value="agingwrinkles">Aging / Wrinkles</option>
  <option value="17" data-value="dry-sensitive">Dry Sensitive</option>
</select>

$("#category").change(function () {
  var selectedItem = $(this).val();
  var abc=$(this).attr("data-value");
});

这里我无法获取jquery中的data-value，我该如何获取？

Answer 1

jQuery 有一个内置的 data 来做你想做的事：

var abc = $(this).data('value')

但是，您必须首先找到所选选项，然后获取其值。

$("#category").change(function () {
   var selectedItem = $(this).val();
   var abc=$(this).find(':selected').data("value");
   console.log(abc)
  });

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
<select id="category" name="category">
  <option value="0">Please Select</option>
  <option value="50" data-value="akne">ACNE</option>
  <option value="11" data-value="rednessbumps">Redness / Bumps</option>
  <option value="15" data-value="sunspotsfreckles">Sunspots / Freckles</option>
  <option value="16" data-value="agingwrinkles">Aging / Wrinkles</option>
  <option value="17" data-value="dry-sensitive">Dry Sensitive</option>
</select>

Answer 2

this 指的是没有任何 data-value 属性的 #category。您应该在其中找到选定的选项。

$(this).find(":selected").attr("data-value");
// Or
$(":selected", this).attr("data-value");

$("#category").change(function () {
  var abc = $(":selected", this).data("value");
  console.log(abc);
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="category" name="category">
  <option value="0">Please Select</option>
  <option value="50" data-value="akne">ACNE</option>
  <option value="11" data-value="rednessbumps">Redness / Bumps</option>
  <option value="15" data-value="sunspotsfreckles">Sunspots / Freckles</option>
  <option value="16" data-value="agingwrinkles">Aging / Wrinkles</option>
  <option value="17" data-value="dry-sensitive">Dry Sensitive</option>
</select>

Answer 3

使用

var abc = $('option:selected',this).data("value");

尝试

$("#category").change(function() {
  var selectedItem = $(this).val();
  var abc = $('option:selected',this).data("value");
  alert(abc);
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="category" name="category">
  <option value="0">Please Select</option>
  <option value="50" data-value="akne">ACNE</option>
  <option value="11" data-value="rednessbumps">Redness / Bumps</option>
  <option value="15" data-value="sunspotsfreckles">Sunspots / Freckles</option>
  <option value="16" data-value="agingwrinkles">Aging / Wrinkles</option>
  <option value="17" data-value="dry-sensitive">Dry Sensitive</option>
</select>

Answer 4

$(document).ready(function(){
$("#category").change(function () {
   var selectedItem = $(this).val();
   var abc= $('option:selected', this).attr('data-value');
   console.log(abc,selectedItem);
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<select id="category" name="category">
  <option value="0">Please Select</option>
  <option value="50" data-value="akne">ACNE</option>
  <option value="11" data-value="rednessbumps">Redness / Bumps</option>
  <option value="15" data-value="sunspotsfreckles">Sunspots / Freckles</option>
  <option value="16" data-value="agingwrinkles">Aging / Wrinkles</option>
  <option value="17" data-value="dry-sensitive">Dry Sensitive</option>
</select>

使用 $('option:selected', this).attr('data-value'); 或 $('option:selected', this).data('value'); 访问所选 option

中的属性

Answer 5

This is the HTML

    <select class="form-control" type="text" onchange="set_bank_branches(this)" id="payment_bank_name" name="payment_bank_name" value="">
<option value=""></option>
<option value="ADB" data-min="16" data-max="16">AGRICULTURAL DEVELOPMENT BANK</option>
<option value="ACC" data-min="13" data-max="13">ACCESS BANK</option>
<option value="BOA" data-min="11" data-max="11">BANK OF AFRICA</option>
</select>

This is the Javascript function that gets the data on the option

function set_bank_branches(x)
{

    // This is where I get the data on the option selected
    var minlength= $(x).find(":selected").attr("data-min");
    var maxlength= $(x).find(":selected").attr("data-min");
    alert("maxlength: " + maxlength + " -- minlength: " + minlength);

}

如何在 jquery 中的 select 更改中获取 selected 选项的数据值

How to get data-value of selected option on select change in jquery

html

javascript

jquery

custom-data-attribute