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

Marking items as complete works but not the other way around

i have no idea whats wrong console gives no errors been trying to work it out for 2 hours but couldn't find anything so i came here

// Problem: User interaction doesn't provide desired results.
// Solution: Add interactivity so the user can 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-tasks

//New Task List Item
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.edit
  var editButton = document.createElement("button");
  // button.delete
  var deleteButton = document.createElement("button");

  // Each elements needs modifing

  // Each element needs appending

  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("Some new task");

  // Append list item to incompleteTaskHolder
  bindTaskEvents(listItem, taskCompleted);

// Edit an existing task
var editTask = function() {
  console.log("edit task...");
  // When the edit Button is pressed
    // if the class of the parent is .editMode
      // Switch from .editMode
      // label text vecome the input's value
    // else
      // Switch to .editMode
      // input value becomes the label's text

    // Toggle .editMode on the parent

  // Delete an existing task
var deleteTask = function() {
  console.log("delete task...");
    // When the Delete button is pressed
      // Remove the parent list item from the ul

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

  // Mark a task as incomplete
var incompleteTask = function() {
  console.log("task incomplete...");
  // Append the task list item to the #incompleted-tasks
  var listItem = this.parentNode;
  bindTaskEvents(listItem, taskCompleted);

var bindTaskEvents = function(taskListItem, checkBoxEventHandler) {
  console.log("bind list item events")
  // 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 deleteTask to delete button
    deleteButton.onclick = deleteTask;

    // bind taskCompleted to checkbox
    checkBox.onchange = taskCompleted;

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

// Cycle over incompleteTaskHolder 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 completedTaskHolder ul list items
for(var i = 0; i < completedTasksHolder.children.length; i++) {
  // bind events to list item's children (taskIncompleted)
  bindTaskEvents(completedTasksHolder.children[i], incompleteTask);

1 Answer

Hi Zain

I haven't taken this course for a while now... but I think you missed the task binding for the check box. Probably you should try to change line 102 from this

    checkBox.onchange = taskCompleted;

to this

      checkBox.onchange = checkBoxEventHandler;

The reason for why you use checkBoxEventHandler (comes as a parameter), is that depending if this box is marked as completed it should be bound to the function incompleteTask and the other way around (this will be done by the loop below - from line 109 onwards)

I hope this helps.