Build one of the most common applications on the web, a simple todo application, with HTML, CSS, and JavaScript.

1. Fork and clone this repository.

2. Navigate to the cloned repository's directory on your command line. Then, run the following command:

   npm install
   

   This will install the libraries needed to run the tests.

3. Open up the repository in VSCode. Follow the instructions below to complete the Lab.

To run the tests, you can run the following command from the command line. You will need to be in the root directory of your local directory.

npm test

This will open the Cypress testing window, where you can click to run an individual suite of tests or all of the tests at once.

Our app will have the following items:

• An h1 title (e.g. "My To-Dos").
• A single ul tag, empty when the page is first loaded.
• A form for the user to add a new to-do, with a single text input and a submit button.

And the following functionalities:

• When the user writes something in the form's text input area and clicks submit, the ul should update with a new li item at the bottom of the list. The page should not refresh.

  Hints/Steps

  1. Add an event listener to the form with .addEventListener. What event do you want to listen for?
  2. Remember, what does event.preventDefault() do?
  3. Grab the value the user typed from the text input. Do you remember what property of the input node has this? If not Google it or ask a peer.
  4. Create new li element with document.createElement(). Set its textContent property to be the text the user typed.
  5. Don't forget to append the created li to the list.

• When the user writes nothing in the form's text input area and clicks submit, an error message (inside a p tag) should appear below the form.

  Hints/Steps

  1. How can you check if the input text has something typed or not?
  2. Have an empty paragraph that is above the <ul> and under the <form>. If the user didn't type anything, modify the content of the paragraph to display a text like: 'Error. Todo cannot be empty'

• When the user clicks on one of the li items, the item should be crossed out, indicating that that to-do is complete. You will need to look at [element].style.textDecoration for the cross out effect. Look at all the different text decoration options.

  Hints/Steps

  1. You will need to add an event listener to all the li elements. Those li elements have yet to be created. How can you add an event listener to these?
  2. How can you only affect the li that was clicked on?

• Have the input go back to empty after adding a new todo.
• Implement a delete button next to each li that removes that li tag entirely.
• Clicking a todo that is crossed out (completed) uncrosses the todo.
• Add the ability to add multiple to-dos if the user submits a text input with multiple lines. Each line should be a new to-do.
• Add some CSS styling to your app.