Put checkbox values into hidden input with jQuery

Question

I\'d like to populate a hidden input with the values of selected checkboxes with a space between these values. I\'ve tried the following which in theory should work but it i

Answer 1

You just need to change your selector and attach your script to some event. For example:

$('input[type=checkbox]').change(function() {

    var vals = $('input[type=checkbox]:checked').map(function() {
        return $(this).val();
    }).get().join(',');

    $('#tags').val(vals);

});​

See this DEMO.

Answer 2

:checkbox is deprecated

Instead of

$(':checkbox:checked')

Use

$('input[type="checkbox"]:checked')

Also none of the checkboxes are checked when the document is Ready .. Set them first and then try ...

HTML

  <input type="checkbox" value="test1" id="test1" checked><label>Test</label>
  <input type="checkbox" value="test2" id="test2" checked><label>Test2</label>
  <input type="checkbox" value="test3" id="test3"><label>Test3</label>
  <input type="text" value="" id="tags">

Javascript

function Populate(){
    vals = $('input[type="checkbox"]:checked').map(function() {
        return this.value;
    }).get().join(',');
    console.log(vals);
    $('#tags').val(vals);
}

$('input[type="checkbox"]').on('change', function() {
    Populate()
}).change();

Check Fiddle