To create a todo application with JavaScript, you will need to use HTML and CSS to build the user interface, and JavaScript to add functionality to the app.
Here is an outline of the steps you can follow to build a simple todo app:
Create an HTML page with a textarea element and a button element. The textarea will be used to enter the todo item, and the button will be used to add the item to the list.
Use CSS to style the page and make it look nice.
In the JavaScript code, create a function that gets called when the button is clicked. This function should get the value of the textarea and add it to an array of todo items.
Create an HTML ul element to display the list of todo items.
In the JavaScript code, create a function that loops through the array of todo items and creates an li element for each item.
Append each li element to the ul element.
To mark a todo item as complete, you can add a checkbox to each li element and toggle the item's completed status when the checkbox is clicked.