jQuery 选择更改显示/隐藏 div 事件

jQuery select change show/hide div event

提问by user2716389

I am trying to create a form which when the select element 'parcel' is selected it will show a div but when it is not selected I would like to hide the div. Here is my markup at the moment:

I am trying to create a form which when the select element 'parcel' is selected it will show a div but when it is not selected I would like to hide the div. 这是我目前的标记：

This is my HTML so far..

到目前为止，这是我的 HTML。

    <div class="row">    
    Type
        <select name="type" id="type" style="margin-left:57px; width:153px;">
                <option ame="l_letter" value="l_letter">Large Letter</option>
                <option name="letter" value="letter">Letter</option>
                <option name="parcel" value="parcel">Parcel</option>
        </select>                    
</div>

<div class="row" id="row_dim">
    Dimensions
        <input type="text" name="length" style="margin-left:12px;" class="dimension" placeholder="Length">
        <input type="text" name="width" class="dimension" placeholder="Width">
        <input type="text" name="height" class="dimension" placeholder="Height">
</div> 

This is my jQuery so far..

到目前为止，这是我的 jQuery..

  $(function() {
    $('#type').change(function(){
        $('#row_dim').hide(); 
        $("select[@name='parcel']:checked").val() == 'parcel').show();   
    });
});

回答by Yasitha

Use following JQuery. Demo

使用以下 JQuery。演示

$(function() {
    $('#row_dim').hide(); 
    $('#type').change(function(){
        if($('#type').val() == 'parcel') {
            $('#row_dim').show(); 
        } else {
            $('#row_dim').hide(); 
        } 
    });
});

回答by Cherniv

Try:

尝试：

if($("option[value='parcel']").is(":checked"))
   $('#row_dim').show();

Or even:

甚至：

$(function() {
    $('#type').change(function(){
        $('#row_dim')[ ($("option[value='parcel']").is(":checked"))? "show" : "hide" ]();  
    });
});

JSFiddle: http://jsfiddle.net/3w5kD/

JSFiddle：http: //jsfiddle.net/3w5kD/

回答by Vinay Pratap Singh

change your jquery method to

将您的 jquery 方法更改为

$(function () { /* DOM ready */
    $("#type").change(function () {
        alert('The option with value ' + $(this).val());
        //hide the element you want to hide here with
        //("id").attr("display","block"); // to show
        //("id").attr("display","none"); // to hide
    });
});

回答by saurabh yadav

<script>  
$(document).ready(function(){
    $('#colorselector').on('change', function() {
      if ( this.value == 'red')
      {
        $("#divid").show();
      }
      else
      {
        $("#divid").hide();
      }
    });
});
</script>

Do like this for every value Also change the values... as per your parameters

对每个值都这样做 还要更改值...根据您的参数

回答by mycotn

I used the following jQuery-based snippet to have a select-element show a div-element that has an idthat matches the valueof the option-element while hiding the divs that do not match. Not sure that it's the best way, but it is a way.

我使用以下基于 jQuery 的代码段让select-element 显示一个div-element，该-element 具有id与-element 的匹配的value，option同时隐藏div不匹配的s。不确定这是最好的方法，但它是一种方法。

$('#sectionChooser').change(function(){
    var myID = $(this).val();
    $('.panel').each(function(){
        myID === $(this).attr('id') ? $(this).show() : $(this).hide();
    });
});

.panel {display: none;}
#one {display: block;}

<select id="sectionChooser">
    <option value="one" selected>Thing One</option>
    <option value="two">Thing Two</option>
    <option value="three">Thing Three</option>
</select>

<div class="panel" id="one">
    <p>Thing One</p>
</div>
<div class="panel" id="two">
    <p>Thing Two</p>
</div>
<div class="panel" id="three">
    <p>Thing Three</p>
</div>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

回答by Sergio

Try this:

尝试这个：

 $(function () {
     $('#row_dim').hide(); // this line you can avoid by adding #row_dim{display:none;} in your CSS
     $('#type').change(function () {
         $('#row_dim').hide();
         if (this.options[this.selectedIndex].value == 'parcel') {
             $('#row_dim').show();
         }
     });
 });

Demo here

演示在这里

回答by i_like_robots

Nothing new but caching your jQuery collections will have a small perf boost

没有什么新鲜事，但缓存你的 jQuery 集合将有一个小的性能提升

$(function() {

    var $typeSelector = $('#type');
    var $toggleArea = $('#row_dim');

    $typeSelector.change(function(){
        if ($typeSelector.val() === 'parcel') {
            $toggleArea.show(); 
        }
        else {
            $toggleArea.hide(); 
        }
    });
});

And in vanilla JS for super speed:

在原版 JS 中实现超高速：

(function() {

    var typeSelector = document.getElementById('type');
    var toggleArea = document.getElementById('row_dim');

    typeSelector.onchange = function() {
        toggleArea.style.display = typeSelector.value === 'parcel'
            ? 'block'
            : 'none';
    };

});

回答by Saranya Sadhasivam

Try the below JS

试试下面的JS

$(function() {
    $('#type').change(function(){
        $('#row_dim').hide(); 
        if ($(this).val() == 'parcel')
        {
             $('#row_dim').show();
        }
    });
});

回答by Cthulhu

Try this:

尝试这个：

$(function() {
    $("#type").change(function() {
        if ($(this).val() === 'parcel') $("#row_dim").show();
        else $("#row_dim").hide();
    }
}