View difference between Paste ID: 2tJ2x7uN and vW5exWDU

 <html>
 
 <script type="text/javascript" src = "scripts.js">
 </script>
 
 <body>
  <div id="add-task">
      <p>Text</p>
      <input />
      <button onclick="onButtonClick()">Button</button>
  </div>
 
  <br>
  <button onclick="Clear_all_tasks()">Clear all</button>
 <br>
  <strong>All Tasks:</strong>
  <div id="tasks-list-empty" style="display:none">
      <br/>
      you have no tasks
  </div>
      <div id="task-list">
      <ul>
          <li>Hi!</li>
          <li>Hello!)</li>
      </ul>
      </div>
 
 
 </body>
 
 </html>
 
 //---------------------------------------------------------------------------------------------------------------------------------
                                                      // scripts.js
 
 var data = []; //massiv
 
  //peremalovka
     var redrow = function ()
     {
         var taskelem= getULList();
         taskelem.innerHTML = '';
         var li = [];
         for (k in data)
         {
             var task = data[k];
             taskelem.innerHTML += '<li>'+task+'</li>';
         }
         hideEmpty();
 
 }
 
 function getULList(){
     var taskslistelem = document
         .getElementById('task-list')
         .getElementsByTagName('ul')[0];
     return taskslistelem;
 }
 
 function onButtonClick(){
     var input = document
         .getElementById('add-task')
         .getElementsByTagName('input')[0];
 
     var value = input.value;
     data.push(value);
     redrow();
 
 }
 
 function Clear_all_tasks(){
     var taskslistelem = getULList();
     taskslistelem.innerHTML = ' ';
     showEmpty();
 }
 
 var showEmpty = function () {
     var taskListEmptyEl = document.getElementById('tasks-list-empty');
     taskListEmptyEl.style.display = '';
-    data = [];
+
 
 var hideEmpty = function () {
     var taskListEmptyEl = document.getElementById('tasks-list-empty');
     taskListEmptyEl.style.display = 'none';
 }