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CSS

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HTML 

              
                <div class="container">
  <div class="task__head task--row">YOUR TASKS (CLICK & HOLD TO REMOVE)</div>
  <form action="">
    <div class="task__list">
    <label for="task--1" class="task"><input class="task__check" type="checkbox" id="task--1" /> <div class="task__field task--row"> Task number one<button class="task__important"><i class="fa fa-check" aria-hidden="true"></i></button></div></label>
    <label for="task--2" class="task"><input class="task__check" type="checkbox" id="task--2" /> <div class="task__field task--row"> Second Task<button class="task__important"><i class="fa fa-check" aria-hidden="true"></i></button></div></label>
    <label for="task--3" class="task"><input class="task__check" type="checkbox" id="task--3" /> <div class="task__field task--row"> Third task<button class="task__important"><i class="fa fa-check" aria-hidden="true"></i></button></div></label>
    <label for="task--4" class="task"><input class="task__check" type="checkbox" id="task--4" /> <div class="task__field task--row"> Task number four<button class="task__important"><i class="fa fa-check" aria-hidden="true"></i></button></div></label>
    </div>
      <div class="task--row task__footer">
    
    <input class="task__add" type="text" value="+ add new task">
  </div>
  </form>
</div>
!

CSS 

              
                @import url(https://fonts.googleapis.com/css?family=Space+Mono:400,700);

html, body {
  height: 100%;
  width: 100%;
}
body {
  background: #FFBE0B; 
  font-family: "Space Mono";
  font-weight:400;
  font-size: 0.8em;
  color: #aaa;
  display:flex;
  
}

input {
  font-family: "Space Mono";
  font-size:1em;
  outline:none;
}

* {
  margin:0;
  padding:0;
}

.container {
  width: 600px;
  margin: auto;
  box-shadow: 0 0 2px hsla(0,0%,0%,0.2); 
  border-radius:6px;
  background-color:#f8f8f8;
}

@keyframes shake {
  from {left: -2px;}
  to   {left: 2px;}
}

@keyframes birth {
  from {height:0;}
  to   {height: 50px;}
}

.task--row {
  height: 50px;
  padding:0 20px;
  line-height:50px;
}

.task__head {
  background: #FE5F55;
  color: white;
  font-weight:bold;
  border-top-left-radius:6px;
  border-top-right-radius:6px;
}

.task__footer {
  transition: all 0.2s cubic-bezier(.7,.2,.17,1);
  background: #1CCAD8;
  border-bottom-left-radius:6px;
  border-bottom-right-radius:6px;
}

.task__footer:hover {background-color:#54E0EA}

.task {
  overflow:hidden;
  transition: all 0.2s 0.2s cubic-bezier(.7,.2,.17,1);
  position:relative;
  display:block;
}

.task__check {
  position: absolute;
  left: -9999px; 
  z-index: -1;
}

.task__field {
  transition: background-size 0.8s 0.2s cubic-bezier(.7,.2,.17,1),
              background-color 0.2s cubic-bezier(.7,.2,.17,1),
              height 0.2s 1s cubic-bezier(.7,.2,.17,1);
  position:relative;
  background-color:#f8f8f8;
  border-top: 1px solid #eee;
  background-image: linear-gradient(to right, #FE5F55, red);
  background-size: 0 2px;
  background-repeat:no-repeat;
  background-position: left bottom;
}

.task__field:hover {background-color:white;}

.task:first-child .task__field {
  border-top:none;
}

.task--new:last-child {
  animation: birth 0.3s cubic-bezier(.7,.2,.17,1) 1;
}

.task__field.shaking {
  animation: shake 0.1s 0.1s infinite ease-in-out;
  background-size: 100% 2px;
}

.task__check:checked + .task__field {
  color: #47D185;
}

.task__important {
  transition: all 0.3s cubic-bezier(.09,.66,.36,1.8);
  opacity:0;
  position: absolute;
  right:0;
  top:0;
  transform: scale(0);
  color: #47D185;
  font-size:1.4em;
  height:50px;
  width:50px;
  border:0;
  background:none;
}

.task__check:checked + .task__field > .task__important {
  opacity: 0.5;
  transform: scale(1);
}

.task__field.delete {
  transition: all 0.2s cubic-bezier(.7,.2,.17,1);
  transform: scale(1.5, 2);
  height:0;
  opacity:0;
}

.task__add {
  height:50px;
  border:0;
  background:none;
  width:100%;
  color:white;
}
!

JS 

              
                $('.task__add').on('focus',function(){
  $(this).val('');
});

$('.task__add').on('blur',function(){
  $(this).val('+ add new task');
});

$('form').on('submit', function(event){
  event.preventDefault();
  
  var taskText = $('.task__add').val();
  var tasksN = $('.task').length + 1;
  
  var newTask = '<label for="task--' + tasksN + '" class="task task--new"><input class="task__check" type="checkbox" id="task--' + tasksN + '" /> <div class="task__field task--row">' + taskText + '<button class="task__important"><i class="fa fa-check" aria-hidden="true"></i></button></div></label>'

  
  $('.task__list').append(newTask);

  $('.task__add').val('');
  checkList();
});

var lastDeletedTask = '';


function checkList() {
  
  
  $('.task').each(function(){

    var $field = $(this).find('.task__field');
    var mousedown = false;


    $field.on('mousedown', function(){
        mousedown = true;
        $field.addClass('shaking');
        setTimeout(deleteTask,1000)
    });

    $field.on('mouseup', function(){
        mousedown = false;
        $field.removeClass('shaking');
    });

    function deleteTask(){
      if(mousedown) {
        $field.addClass('delete');
        lastDeletedTask = $field.text();
        console.log(lastDeletedTask);
        
        setTimeout(function(){
           $field.remove();
        }, 200);
       } else {return;}
    }

  });
}

checkList();
!
999px

Console