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JavaScript Interactive Web Pages with JavaScript Traversing and Manipulating the DOM with JavaScript Perform: Changing Classes

For some reason when I type into the input field to add a to do event, it shows up blank.. can you help me out as to why

//Problem: User interaction doesnt provide desired results.
//Solution: add interactivity so 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 Liste Item
var createNewTaskElement = function(taskString) {
  //Create List Item
  var listItem = document.createElement("li");

  //input (checkbox)
  var checkBox = document.createElement("input"); //checkbox
  var label = document.createElement("label");
    // input (text)
  var editInput = document.createElement("input");

  var editButton = document.createElement("button"); 
  var deleteButton = document.createElement("button");

  //Each elements, needs modifying

  checkBox.type = "checkbox";
  editInput.type = "text";

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

  //Each element needs appending

  return listItem;

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

//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

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

//Mark a task as incomplete
var taskIncomplete = function () {
  console.log("Task Complete...");
  //Append the task list item to the uncomplete-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 checkBoxEventHandler to the checkbox
  checkBox.onchange = checkBoxEventHandler;

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

//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);

for(var i=0; i<completedTasksHolder.children.length; i++){
  //bind events to list item's children (taskIncomplete)
  bindTaskEvents(completedTasksHolder.children[i], taskIncomplete);

4 Answers

Matteo Mainardi
Matteo Mainardi
7,372 Points

hi Sam Pereless, I'd the same problem, but there is a solution: the input value is there, as you can check with console.log(taskInput.value); , but Firefox has problems with the property innerText, so you need to use textContent instead:

editButton.textContent  = "Edit";
deleteButton.textContent  = "Delete";  
label.textContent  = taskString;

you also need to substitute the properties in editTask, if you don't want an undefined value when switching to edit mode:

editInput.value = label.textContent;
label.textContent = editInput.value;

hope this helps

Kenneth Shim
Kenneth Shim
17,969 Points

this helped me. Thanks. :)

I'm a little late to the party, but it's not actually the innerText property that is the issue here.

It's the fact that Andrew has unfortunately not closed the querySelect argument properly (1:08 in the video):

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

Should be:

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

i.e. it needs to have the closing square bracket for the attribute selector.

I was surprised that Chrome and IE11 didn't throw any errors regarding the incorrect syntax.

Hi Andrew Chalkley I have the same problem when use Firefox. I downloaded the project_stage_3_end folder and I think there is a bug within the code. I found this in Line 65 (app.js) and fixed it but still get an empty task in my ToDo list.

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

Could you please try to run the stage 3 code with FIreFox.

Many thanks.


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