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JavaScript Interactive Web Pages with JavaScript Traversing and Manipulating the DOM with JavaScript Perform: Appending and Removing Elements

Hamza Hajji
Hamza Hajji
11,931 Points

Weird Problem

I don't understand what's going on with my code and it's so frustrating When i uncheck the checkbox in the item from the completed it doesn't go to the incomplete items list and when i check the console it says this : Uncaught ReferenceError: IncompleteTasksHolder is not defined even though it is defined earlier in the code, so what could be the problem ? here's the code from my text editor:

// Problem: User Interaction doesn't provide desired results
// Solution: Add interactivity for users to manage daily tasks

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

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

  // Each element needs modifying

  // Each element needs appending

  return listItem;

// Add new task
var addTask = function () {
  // Create a new list item with the text from #new-task
  var listItem = createNewTaskElement('New Task');

  // append listItem to IncompleteTasksHolder

  bindTaskEvents(listItem, taskCompleted);

// Edit existing task
var editTask = function () {
  console.log('Editing Task ...');
  // When the Edit button is pressed
    // if the class of the parent is .editMode
      // Switch form .editMode
      // label text becomes the input's value
    // else
      // Switch to .editMode
      // input value becomes label's text

    // Toggle .editMode on the parent

// Delete task
var deleteTask = function () {
  console.log('Deleting Task ...');
  // When Delete is pressed
    // Remove the parent list item from the ul
  var listItem = this.parentNode;
  var ul = listItem.parentNode;

// Mark task as complete
var taskCompleted = function () {
  console.log('Task Comlete ...');
  // append the task list item to the #completed-tasks
  var listItem = this.parentNode;

  bindTaskEvents(listItem, taskIncomplete);

// Mark task as incomplete
var taskIncomplete = function () {
  console.log('Task Incomplete ...');
  // append the task list item to the #incomplete-tasks
  var listItem = this.parentNode;

  bindTaskEvents(listItem, taskCompleted);

var bindTaskEvents = function (taskListItem, checkboxEventHandler) {
  // select taskListItem's children
  var checkBox = taskListItem.querySelector('input[type="checkbox"]');
  var editButton = taskListItem.querySelector('button.edit');
  var deleteButton = taskListItem.querySelector('button.delete');
  // bind editTask to edit button
  editButton.onclick = editTask;
  // bind deletTask with delete button
  deleteButton.onclick = deleteTask;
  // bind checkboxEventHandler to the checkbox
  checkBox.onchange = checkboxEventHandler;

addButton.onclick = addTask;

// Cycle over incompleteTasksHolder ul list
for ( var i = 0; i < incompleteTasksHolder.children.length; i += 1 ) {
  // bindTaskEvents()
  bindTaskEvents(incompleteTasksHolder.children.item(i), taskCompleted);

// Cycle over completedTasksHolder ul list
for ( var i = 0; i < completedTasksHolder.children.length; i += 1 ) {
  // bindTaskEvents()
  bindTaskEvents(completedTasksHolder.children.item(i), taskIncomplete);

i've been trying to solve this for nearly an hour but it's so frustrating and i can't complete the rest of the videos like this

1 Answer

Benjamin Barslev Nielsen
Benjamin Barslev Nielsen
18,958 Points

should be


inside your taskIncomplete function.

Hamza Hajji
Hamza Hajji
11,931 Points

thank you, i couldn't see it almost lost my mind