Edit button stacked on top of delete button and not next to each other.

var taskInput = document.getElementById("new-task"); //new-task
var addButton = document.getElementsByTagName("button")[0]; //first button
var incompleteTasksHolder = document.getElementById("incomplete-tasks"); //incomplete-task
var completeTasksHolder = document.getElementById("completed-tasks"); //completed-task

//New Task List Item
var createNewTaskElement = function(taskString) {
    //Create List Item
    var listItem = document.createElement("li");
    //input (checkbox)
    var checkBox = document.createElement("input");
    //label
    var label = document.createElement("label");
    //input (text)
    var editInput = document.createElement("input");
    //button.edit
    var editButton = document.createElement("button");
    //button.delete
    var deleteButton = document.createElement("button");

    //Each element needs modifing
    checkBox.type = "checkbox";
    editInput.type = "text";

    editButton.innerText = "Edit";
    editButton.className = "edit";
    deleteButton.innerText = "Delete";
    deleteButton.className = "delete";

    label.innerText = taskString;


    //Each element needs appending
    listItem.appendChild(checkBox);
    listItem.appendChild(label);
    listItem.appendChild(editInput);
    listItem.appendChild(editButton);
    listItem.appendChild(deleteButton);

    return listItem;
}

//Add a new task
var addTask = function() {
    console.log("Add task...");
    //Create a new list item with the text from #new-task:
    var listItem = createNewTaskElement(taskInput.value);

    //Append listItem to incompleteTasksHolder
    incompleteTasksHolder.appendChild(listItem);
    bindTaskEvents(listItem, taskCompleted);

}


//Edit an existing task
var editTask = function() {
    console.log("Edit task...");

    var listItem = this.parentNode;

    var editInput = listItem.querySelector("input[type=text]");
    var label = listItem.querySelector("label");

    var containsClass = listItem.classList.contains("editMode");

    //if the class of the parent is .editMode
    if (containsClass) {
        //Switch from .editMode
        //label text become the input's value
        label.innerText = editInput.value;
    } else {
        //Switch to .editMode
        //input value becomes the label's text
        editInput.value = label.innerText;
    }
        //Toggle .editMode on the parent
        listItem.classList.toggle("editMode");
}

//Delete an existing task
var deleteTask = function() {
    console.log("Delete task...");
    var listItem = this.parentNode;
    var ul = listItem.parentNode;

    //Remove the parent list item from the ul
    ul.removeChild(listItem);
}

//Mark a task as complete
var taskCompleted = function() {
    console.log("Task complete...");
    //Append the task list to the #completed-tasks
    var listItem = this.parentNode;
    completeTasksHolder.appendChild(listItem);
    bindTaskEvents(listItem, taskIncomplete);
}

//Mark a task as incomplete
var taskIncomplete = function() {
    console.log("Task incomplete...");
    //Append the task list to the #incomplete-tasks
    var listItem = this.parentNode;
    incompleteTasksHolder.appendChild(listItem);
    bindTaskEvents(listItem, taskCompleted);
}

//Set the click handler to the addTask function
addButton.onclick = addTask;


var bindTaskEvents = function( taskListItem, checkBoxEventHandler) {
    console.log("Bind list items");
    //select taskListItem's children
        var checkBox = taskListItem.querySelector("input[type=checkbox]");
        var editButton = taskListItem.querySelector("button.edit");
        var deleteButton = taskListItem.querySelector("button.delete");

        //bind the editTask to edit button
        editButton.onclick = editTask;

        //bind the deleteTask to the delete button
        deleteButton.onclick = deleteTask;

        //bind the checkBoxEventHandler to checkbox
        checkBox.onchange = checkBoxEventHandler;
}


//Cycle over incompleteTasksHolder ul list items
    for(var i = 0; i < incompleteTasksHolder.children.length; i++)
        //bind events to list item's children (taskCompleted)
        bindTaskEvents(incompleteTasksHolder.children[i], taskCompleted);


//Cycle over completeTasksHolder ul list items
    for(var i = 0; i < completeTasksHolder.children.length; i++) {
        //bind events to list item's children (taskIncomplete)
        bindTaskEvents(completeTasksHolder.children[i], taskIncomplete);
}

```javascript

html code

```html

<!DOCTYPE html>
<html>
  <head>
    <title>Todo App</title>
    <link href='http://fonts.googleapis.com/css?family=Lato:300,400,700' rel='stylesheet' type='text/css'>
    <link rel="stylesheet" href="css/style.css" type="text/css" media="screen" charset="utf-8">    
  </head>
  <body>
    <div class="container">
      <p>
        <label for="new-task">Add Item</label>
        <input id="new-task" type="text">
        <button>Add</button>
      </p>

      <h3>Todo</h3>
      <ul id="incomplete-tasks">
        <li>
          <input type="checkbox">
          <label>Pay Bills</label>
          <input type="text">
          <button class="edit">Edit</button>
          <button class="delete">Delete</button>
        </li>
        <li class="editMode">
          <input type="checkbox">
          <label>Go Shopping</label>
          <input type="text" value="Go Shopping">
          <button class="edit">Edit</button>
          <button class="delete">Delete</button>
        </li>
      </ul>

      <h3>Completed</h3>
      <ul id="completed-tasks">
        <li>
          <input type="checkbox" checked>
          <label>See the Doctor</label>
          <input type="text">
          <button class="edit">Edit</button>
          <button class="delete">Delete</button>
        </li>
      </ul>
    </div>

    <script type="text/javascript" src="js/app.js"></script>

  </body>
</html>

```html

CSS

/* Basic Style */
body {
  background: #fff;
  color: #333;
  font-family: Lato, sans-serif;
}
.container {
  display: block;
  width: 400px;
  margin: 100px auto 0;
}
ul {
  margin: 0;
  padding: 0;
}
li * {
  float: left;
}
li, h3 {
  clear:both;
  list-style:none;
}
input, button {
  outline: none;
}
button {
  background: none;
  border: 0px;
  color: #888;
  font-size: 15px;
  width: 60px;
  margin: 10px 0 0;
  font-family: Lato, sans-serif;
  cursor: pointer;
}
button:hover {
  color: #333;
}
/* Heading */
h3,
label[for='new-task'] {
  color: #333;
  font-weight: 700;
  font-size: 15px;
  border-bottom: 2px solid #333;
  padding: 30px 0 10px;
  margin: 0;
  text-transform: uppercase;
}
input[type="text"] {
  margin: 0;
  font-size: 18px;
  line-height: 18px;
  height: 18px;
  padding: 10px;
  border: 1px solid #ddd;
  background: #fff;
  border-radius: 6px;
  font-family: Lato, sans-serif;
  color: #888;
}
input[type="text"]:focus {
  color: #333;
}

/* New Task */
label[for='new-task'] {
  display: block;
  margin: 0 0 20px;
}
input#new-task {
  float: left;
  width: 318px;
}
p > button:hover {
  color: #0FC57C;
}

/* Task list */
li {
  overflow: hidden;
  padding: 20px 0;
  border-bottom: 1px solid #eee;
}
li > input[type="checkbox"] {
  margin: 0 10px;
  position: relative;
  top: 15px;
}
li > label {
  font-size: 18px;
  line-height: 40px;
  width: 237px;
  padding: 0 0 0 11px;
}
li >  input[type="text"] {
  width: 226px;
}
li > .delete:hover {
  color: #CF2323;
}

/* Completed */
#completed-tasks label {
  text-decoration: line-through;
  color: #888;
}

/* Edit Task */
ul li input[type=text] {
  display:none;
}

ul li.editMode input[type=text] {
  display:block;
}

ul li.editMode label {
  display:none;
}