Tasker TDL

Properties:

tasker.taskInput - textbox input of user task
tasker.taskList - <ul> </ul> parent of list items
tasker.taskListChildren - <li> </li> list item children of parent <ul> </ul> taskList
tasker.addButton - button to add new user task
tasker.errorMessage - display error message

Methods:

tasker.selectElements() - Create properties by selecting document objects elements with document.getElementById() method
	Create tasker.taskInput property by selecting "input-task" element
	Create tasker.taskList property by selecting "tasks" element
	Create tasker.taskListChildren  property by selecting "tasks" element children with element.children property
	Create tasker.addButton  property by selecting "add-task-btn" element
	Create tasker.errorMessage  property by selecting "error" element
tasker.buildTask() - Create list item HTML of the user task being added to the to do list
	Declare variables: taskListItem, taskCheckbox, taskValue, taskButton, taskTrash
	Create taskListItem <li></li> element with document.createElement() method and set the attributes with element.setAttribute() method
	Create taskCheckbox input field and set the attributes
	Create taskValue with document.createTextNode() method by getting the value from this.taskInput.value
	Create taskButton for deleting task list items
	Create taskTrash icon and set the attributes
	Append taskTrash icon to the delete button with element.appendChild() method
	Append taskCheckbox, taskValue, and taskButton to the taskListItem
	Append taskListItem to the taskList parent element
tasker.error() - show the error message if the value of the user input text field is empty by setting the display value of this.errorMessage.syle property to "block"
tasker.addTask() - add the new task to the list
	Declare and initialize taskValue variable with this.taskInput.value
	Remove error message by resetting this.errorMessage.style.display value to "none"
	If taskValue is empty, display error message by calling tasker.error() method
	Else add the new task to the list by calling tasker.buildTask() method
	Reset tasker.taskInput.value to empty string ""
	Call tasker.scanTaskList() method to add click events to checkbox and delete button to the new task
tasker.enterKey() - call this.addTask() method on enter key event - keyCode 13
tasker.bindEvents() - bind tasker.addTask() to tasker.addButton.onclick event and tasker.enterKey() to  tasker.taskInput.onkeypress by using element.bind() method
tasker.scanTaskList() - add onclick events to checkbox to mark tasks as complete/incomplete and delete button to remove tasks from the list
	Declare variables taskListItem, checkBox and deleteButton
	Create the loop to loop through all tasker.taskListChildren elements
	Set the value of taskListItem variable to current tasker.taskListChildren element by using tasker.taskListChildren[i]
	Set the value of checkBox variable to current taskListChild checkbox by using element.getElementsByTagName() method with "input"[0] as parameter
	Set the value of deleteButton variable to current tasker.taskListChildren button element by using element.getElementsByTagName() method with "button"[0] as parameter
	Bind tasker.completeTask() to checkBox.onclick event by using element.bind() method. Pass the taskListItem and checkbox variables as parameters to tasker.completeTask() method.
	Bind tasker.deleteTask() method to deleteButton.onclick event using element.bind() method and passing i counter as parameter
tasker.deleteTask() - Delete user task from the list
	Remove child element tasker.taskListChildren from tasker.taskList parent by using the argument from tasker.scanTaskList() method
	Call tasker.scanTaskList()
tasker.completeTask() - Mark user task complete (crossed out)
	Pass variables taskListItem and checkbox as method arguments
	If checkBox is checked set taskListItem.className to "task completed"
	Else if checkBox is not checked call tasker.incompleteTask() method with taskListItem passed as argument
tasker.incompleteTask() - Mark user task incomplete (not crossed out)
	Pass taskListItem as argument and set the value of taskListItem.className property to "task"
tasker.construct() - call tasker.selectElements(), tasker.bindEvents(), and tasker.scanTaskList() methods