[jquery] jQuery select change show/hide div event

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:

This is my HTML so far..

    <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..

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

<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

Try this:

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

Try this:

 $(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

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

$('#sectionChooser').change(function(){_x000D_
    var myID = $(this).val();_x000D_
    $('.panel').each(function(){_x000D_
        myID === $(this).attr('id') ? $(this).show() : $(this).hide();_x000D_
    });_x000D_
});

.panel {display: none;}_x000D_
#one {display: block;}

<select id="sectionChooser">_x000D_
    <option value="one" selected>Thing One</option>_x000D_
    <option value="two">Thing Two</option>_x000D_
    <option value="three">Thing Three</option>_x000D_
</select>_x000D_
_x000D_
<div class="panel" id="one">_x000D_
    <p>Thing One</p>_x000D_
</div>_x000D_
<div class="panel" id="two">_x000D_
    <p>Thing Two</p>_x000D_
</div>_x000D_
<div class="panel" id="three">_x000D_
    <p>Thing Three</p>_x000D_
</div>_x000D_
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Try:

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

Or even:

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

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

Try the below JS

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

change your jquery method to

$(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
    });
});

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

$(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:

(function() {

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

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

});