JavaScript if else works like checkbox always in initial state

Question

I can receive a checkbox (blackbox) state like true or false in the browser developer console correctly with

$("#blackbox").prop('checked')

or with

$('#blackbox').is(':checked')

. Tried both.

Let's say I use

checked

in checkbox

<input type="checkbox" id="blackbox" name="blackbox" title="Enable Something" checked>

I'll get longform output both with checkbox checked and unchecked. Same happens with empty checkbox

<input type="checkbox" id="blackbox" name="blackbox" title="Enable Something">

, all I can get in the end is short data output both with checked and unchecked checkbox.

What I really want is long output when the checkbox is checked and short output when the checkbox is unchecked.

<div class="container">

    <form action="add" id="urlform" method="POST" accept-charset="utf-8">

    <div class="control-group">

    <div class="input-append">

    <input type="checkbox" id="blackbox" name="blackbox" title="Enable Something">

    <input type="text" id="url" value="" placeholder="Text">

    <input class="btn btn-warning "type="submit" value="Shorten">

</div>

</div>

</form>

</div>

<form action="/s/add" id="longform" method="POST" accept-charset="utf-8"></form>

<script>

var form = $('#urlform');

var form2 = $('#longform');



if ($('#blackbox').is(':checked')) {

    test = form2;

} else {

    test = form;

}

form.submit(function () {

$.ajax({

    type: test.attr('method'),

    url: test.attr('action') + '?url=' + $('#url').val(),

    success: function (data) {

    test.append('<p style="color:#FFA500">' + 'https://' + location.host + '/' +

    data[0].uid + '</p>')

    }

});

return false;

});

</script>

Answer 1

The if ($('#blackbox').is(':checked')) { ... } is happening on page load and the form.submit is happening multiple times but only using the value that was set on page load.

Move the logic into the form.submit() action:

<script>
  var form = $('#urlform');
  var form2 = $('#longform');

  form.submit(function () {
    if ($('#blackbox').is(':checked')) {
      test = form2;
    } else {
      test = form;
    }
    $.ajax({
        type: test.attr('method'),
        url: test.attr('action') + '?url=' + $('#url').val(),
        success: function (data) {
          test.append('<p style="color:#FFA500">' + 'https://' + location.host + '/' +
          data[0].uid + '</p>')
        }
    });
    return false;
  });
</script>

JavaScript if else works like checkbox always in initial state

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