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Start your free trialDavid Sotomayor
10,136 PointsSome technical problems running my code through Chrome
I've been debugging this code for a few hours now. The code seems to be correct after staring at each line of code to make sure I have not spelled anything incorrectly. Running this code through WorkSpaces yields perfect results. However, running this code through Chrome displays an "Uncaught TypeError: Cannot read property 'children' of null" on line 143.
// Problem: User Interaction doesn't provide desired results
// Solution: Add interactivety 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");
// 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 to be modified
checkBox.type = "checkbox";
editInput.type = "text";
editButton.innerText = "Edit";
editButton.className = "edit";
deleteButton.innerText = "Delete";
deleteButton.className = "delete";
label.innerText = taskString;
// And appended
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 to 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 (list item)
listItem.classList.toggle("editMode");
}
// Mark a task as complete
var taskCompleted = function () {
console.log("Completed task...");
// Append the task list item to the #completed-tasks
var listItem = this.parentNode;
completedTasksHolder.appendChild(listItem);
bindTaskEvents ( listItem, taskIncomplete );
}
// Mark a task as incomplete
var taskIncomplete = function () {
console.log("Incompleted task...");
// Append the task list item to the #incomplete-tasks
var listItem = this.parentNode;
incompleteTasksHolder.appendChild(listItem);
bindTaskEvents( listItem, taskCompleted );
}
// 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);
}
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 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);
}
// Cycle over completedTasksHolder ul list items
for(var i = 0; i < completedTasksHolder.children.length; i++) {
// Bind events to list item's children (taskIncomplete)
bindTaskEvents(completedTasksHolder.children[i], taskIncomplete);
}
I use a separate text editor
Jonathan Grieve
Treehouse Moderator 91,253 PointsHi David,
I fixed up the code for you. Have a look at the forum code with the markdown cheatsheet to refresh on how to do it. :-)
David Sotomayor
10,136 PointsDavid Sotomayor
10,136 PointsI don't know what I did to remove the color.
Sorry in advance