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JavaScript To-Do List App

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Questions and Answers

What is the purpose of the code snippet `var span = document.createElement("SPAN");`?

To create a new list item

To remove a list item from the list

To append text to an existing list item

To create a close button for each list item (correct)

What happens when the close button is clicked on a list item?

The list item is appended to the end of the list

The list item is removed from the list

The list item is moved to the top of the list

The list item is hidden from view (correct)

What is the purpose of the event listener in the code `list.addEventListener('click', function(ev) {...})`?

To display an alert message

To add a new list item to the list

To toggle the 'checked' class on a list item (correct)

To remove a list item from the list

What is the purpose of the `newElement()` function?

To create a new list item Signup and view all the answers

What is the condition for the alert message to be displayed?

When the input field is empty Signup and view all the answers

What is the purpose of the `getElementsByClassName("close")` method?

To get all elements with the class 'close' Signup and view all the answers

What happens when the 'Add' button is clicked?

A new list item is created and appended to the list Signup and view all the answers

What is the purpose of the `appendChild()` method in the code?

To add a new child node to a parent node Signup and view all the answers

Study Notes

Creating and Managing List Items

The code creates a "close" button and appends it to each list item using document.getElementsByTagName("LI") and a for loop.
The close button is a  element with a class of "close" and a Unicode character \u00D7 as its text content.
Clicking on the close button hides the current list item by setting its parent element's display property to "none".

Toggling List Items

The code adds a "checked" symbol when clicking on a list item using an event listener on the <ul><li> element.
The event listener toggles the "checked" class on the list item when it is clicked.

Creating New List Items

The newElement() function creates a new list item when the "Add" button is clicked.
The function creates a new </li><li> element and appends it to the <ul><li> element with an ID of "myUL".
The text content of the new list item is taken from the input field with an ID of "myInput".
The function also appends a close button to the new list item.

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Description

Create a to-do list app using JavaScript, where users can add and remove tasks. This quiz will test your understanding of JavaScript concepts like document object model manipulation and event handling.