CODEWITHSUNDEEP
jqueryhtml
Newbie
Newbie

Reputation: 249

How to replace the label of select with its value?

HTML: 

<input type="radio" name="timeformat" id="timeformat-a" value="am/pm" checked="checked" /> <b>am/pm</b> 
<input type="radio" name="timeformat" id="timeformat-b" value="24 hours" /> <b>24 hours</b>
        <select id="default-start-time" class="select check-list">
             <option value="" label="--Select--">--Select--</option>
             <option value="00:00" label="12:00 AM">12:00 AM</option>
             <option value="00:30" label="12:30 AM">12:30 AM</option>
             <option value="01:00" label="01:00 AM">01:00 AM</option>
             <option value="01:30" label="01:30 AM">01:30 AM</option>
             <option value="02:00" label="02:00 AM" selected>02:00 AM</option>
             <option value="02:30" label="02:30 AM">02:30 AM</option>
        </select>

When i choose the 24 hours format the option values should display.

jquery:

$("input[name='timeformat']").click(function() {
      if($(this).val()=='24 hours')
      {
         // code which replaces label with the option value       
      }
  });

How should the jquery look??

Upvotes: 0

Views: 3451

Answers (3)

Shankar Cabus
Shankar Cabus

Reputation: 9792

I advise doubling the HTML and simplify the JS:

HTML:

<input type="radio" name="timeformat" value="12" checked="checked" /> <b>am/pm</b> 
<input type="radio" name="timeformat" value="24" /> <b>24 hours</b>

<select id="format-12" class="">
     <option value="" selected>--Select--</option>
     <option value="12:00 AM">12:00 AM</option>
     <option value="12:30 AM">12:30 AM</option>
     <option value="01:00 AM">01:00 AM</option>
     <option value="01:30 AM">01:30 AM</option>
     <option value="04:00 PM">04:00 PM</option>
     <option value="05:30 PM">05:30 PM</option>
</select>
<select id="format-24" class="hide">
     <option value="" selected>--Select--</option>
     <option value="00:00">00:00</option>
     <option value="12:30">12:30</option>
     <option value="01:00">01:00</option>
     <option value="01:30">01:30</option>
     <option value="16:00">16:00</option>
     <option value="17:30">17:30</option>
</select>

JS:

$("input[name='timeformat']").on('change', function(){
    $('select[id*=format-]').toggleClass('hide');
});​

CSS:

.hide { display: none; }​

DEMO: http://jsfiddle.net/9ELJj/

Upvotes: 0

Alnitak
Alnitak

Reputation: 340055

If you have both a label attribute and text content in an <option> element the <label> will take priority.

You can copy the values into the label like this:

$('#default-start-time option').attr('label', function() {
     return this.value;
});

similarly you can copy the text content back into the label like this:

$('#default-start-time option').attr('label', function() {
    return this.innerHTML;
});

See http://jsfiddle.net/alnitak/cLuZa/

Note that (in Chrome, at least) neither will cause the control to change its current displayed value. They only appear when you click on the <select> element again. I'm still working on that...

EDIT here's my final answer:

$("input[name='timeformat']").click(function() {
    var ampm = $(this).val() !== '24 hours';  // get mode
    var sel = $('#default-start-time')[0];    // get the <select> element

    $('option', sel).attr('label', function() {
        return ampm ? this.innerHTML : this.value;
    });

    sel.selectedIndex += 0;  // force refresh
});​

Upvotes: 1

Ohgodwhy
Ohgodwhy

Reputation: 50808

Changing the states of the label based on the value selected is going to change it permanently. We need to store a reference to each the values we want to toggle inside of something that's easy to work with, so we use data attributes.

I don't know if you have access to the HTML, so here's the jQuery to do what we need. 

$('#default-start-time option').each(function(index,obj){
   $(obj).data('ampm', $(obj).prop('label'));
   $(obj).data('24hr', $(obj).val());
});

Now, in the click function, we can toggle between the data attributes based on the value selected.

$("input[name='timeformat']").click(function() {
  if($(this).val()=='24 hours')
  {
      $('#default-start-time option').each(function(index,obj){
          $(obj).prop('label', $(obj).data('24hr'));
      });             
  }
  else
  {
      $('#default-start-time option').each(function(index,obj){
         $(obj).prop('label', $(obj).data('ampm'));
      });
  }
});

Here is the fully working jsFiddle.

Upvotes: 1

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