INVOICE APP

The challenge

Your challenge is to build out this invoicing application and get it looking as close to the design as possible.

You need to use React or another Javascript Framework/Library. You need to use Node.js for the back end. You need to save the data in a database.

Your users should be able to:

• View the optimal layout for the app depending on their device's screen size
• See hover states for all interactive elements on the page
• Create, read, update, and delete invoices
• Receive form validations when trying to create/edit an invoice
• Save draft invoices, and mark pending invoices as paid
• Filter invoices by status (draft/pending/paid)
• Toggle light and dark mode

Expected Behaviour

• Creating an invoice
  • When creating a new invoice, an ID needs to be created. Each ID should be 2 random uppercased letters followed by 4 random numbers.
  • Invoices can be created either as drafts or as pending. Clicking "Save as Draft" should allow the user to leave any form field blank, but should create an ID if one doesn't exist and set the status to "draft". Clicking "Save & Send" should require all forms fields to be filled in, and should set the status to "pending".
  • Changing the Payments Terms field should set the paymentDue property based on the createdAt date plus the numbers of days set for the payment terms.
  • The total should be the sum of all items on the invoice.
• Editing an invoice
  • When saving changes to an invoice, all fields are required when the "Save Changes" button is clicked. If the user clicks "Cancel", any unsaved changes should be reset.
  • If the invoice being edited is a "draft", the status needs to be updated to "pending" when the "Save Changes" button is clicked. All fields are required at this stage.
• Users should be able to mark invoices as paid by clicking the "Mark as Paid" button. This should change the invoice's status to "paid".
• Users should receive a confirmation modal when trying to delete invoices.
• Feel free not to add custom styling for the date and dropdown form fields. The designs for those fields are optional extras and are mostly for illustration purposes.