jQuery evaluate if checkbox is checked and contains the class true [duplicate]

Question

I'm creating a multiple choice assessment using jQuery. Currently the DOM structure is as follows:

<button class="multiplesubmit">Check Answer</button>
<ul class="multiplechoice_answergroup">
<li class="multiplechoice_answer True"><input class="checkbox" type="checkbox" name="checkbox"> Answer 1</li>
<li class="multiplechoice_answer False"><input class="checkbox" type="checkbox" name="checkbox"> Answer 1</li>
<li class="multiplechoice_answer False"><input class="checkbox" type="checkbox" name="checkbox"> Answer 1</li>
<li class="multiplechoice_answer True"><input class="checkbox" type="checkbox" name="checkbox"> Answer 1</li>
</ul>

I need to write a function that when the button is clicked to see if the checkbox is ticked and that the class name of the li contains 'True'.

So far this is my jQuery:

      $('.multiplechoice_answer .Paragraph').prepend('<input class="checkbox" type="checkbox" name="checkme" />');
      $('.multiplechoice_wrap').prepend('<button class="submit_button multiplesubmit">Check Answer</button>');


      $('.multiplesubmit').click(function() {
        multipleChoiceCheck();

      });

      var multipleChoiceCheck = function() {
        if($('input:checkbox[name=checkme]').is(':checked') && $('.multiplechoice_answer').hasClass('True')) {
          alert('correct!');
        }

};

Answer 1

$('.multiplesubmit').click(function () {
  var correctAnswers = $(this).next('ul').children('li').filter(function () {
    return $(this).hasClass('True') && $(this).find('input[type="checkbox"]:checked').length>0;
  });
  if(correctAnswers.length>0) {
    alert('found')
  }
});

JSFiddle

Update

As per comments

$('.multiplesubmit').click(function () {
  var correctAnswers = $(this).next('ul').children('li').filter(function () {
    return $(this).hasClass('True') && $(this).find('input[type="checkbox"]:checked').length>0;
  });
  var wrongAnswers = $(this).next('ul').children('li').filter(function () {
    return $(this).hasClass('False') && $(this).find('input[type="checkbox"]:checked').length>0;
  });
  if (correctAnswers.length>0 && wrongAnswers.length<1) {
    alert('found')
  }
});

JSFiddle

Answer 2

try this:

I change the color of text to red for all incorrect, and green for correct, but I left comments so you can do whatever you like for incorrect and correct answers

$('.multiplesubmit').click(function() {
    $.each('input:checkbox[name=checkme]', function(){
    if( $(this).is(':checked'){
        if( $(this).hasClass('True'){       
           // CHECKED - CORRECT
           $(this).parent().css({ 'color' : 'green' });
         }
         else{
           // CHECKED - INCORRECT
           $(this).parent().css({ 'color' : 'red' });
         }
    }
    else{
      if( $(this).hasClass('True'){       
        // UN-CHECKED - INCORRECT
        $(this).parent().css({ 'color' : 'red' });
      }
        else{
       // UNCHECKED - CORRECT
        $(this).parent().css({ 'color' : 'green' });
      }

    });
});

Answer 3

This will check each checkbox individually, since you could have multiple that are checked and have the True class.

$(document).ready(function() {
  $('.multiplesubmit').click(function() {
    multipleChoiceCheck();
  });
});

function multipleChoiceCheck() {
  $(".multiplechoice_answergroup").find("input[type=checkbox]").each(function() {
    var $this = $(this);
    if($this.prop("checked") && $this.parent().hasClass("True")) {
      alert($this.val());
    }
  });
}

I added values to your checkboxes to differentiate the answers:

<button class="multiplesubmit">Check Answer</button>
<ul class="multiplechoice_answergroup">
    <li class="multiplechoice_answer True"><input class="checkbox" type="checkbox" name="checkbox" value="Answer 1"> Answer 1</li>
    <li class="multiplechoice_answer False"><input class="checkbox" type="checkbox" name="checkbox" value="Answer 2"> Answer 2</li>
    <li class="multiplechoice_answer False"><input class="checkbox" type="checkbox" name="checkbox" value="Answer 3"> Answer 3</li>
    <li class="multiplechoice_answer True"><input class="checkbox" type="checkbox" name="checkbox" value="Answer 4"> Answer 4</li>
</ul>

JS Fiddle Example