Create the basic layout including form components for the interest rate calculator.

To progress further in the application, it must protect against errors caused by user input.

Goals:

• Sanitise user input to prevent crashing the application

• Validate user input for each type (ie. no negative currency, no proportion over 100)

• Show feedback to the user when something is entered wrong
  OR

• Prevent user from entering illegal characters (alphabetic letters in a numeric field)

The result must be displayed in a bar graph for legibility.

Legend renders over x-axis labels until viewport changes in size.

Code reviewed by another developer.

To do list based on feedback provided:

• Move types.tsx out of store/ and into a models/ or types/ directory
• Don't assign default types arbitrarily (ex: Don't use Money, just number)
• Remove all instances of redux including from package.json, if you are not using it.
• Move useState out of App.tsx and into a StrategyContext. More information at this tutorial.
• Write more about the project and dependencies used in README.md
• Turn Frequency into an enum.

The currencies are quite difficult to read with all those 0s, and also lead to overflow errors. Perhaps there is a library that will help abbreviate the displayed currencies?

Abbreviate currencies on:

• x-axis of bar graph
• mouseover tooltip of bar graph

Totals should be displayed underneath the graph in an easy-to-read format.

Create a helper that calculates compound interest, given the user's input.

In order to progress further in the production of this compound interest calculator, the app needs to be able to save and load state.

Goals

• Setup Redux to manage state
• Save data from form
• Access state and print it to console

The tooltip text is unreadable on small screens such as the iPhone SE, because it is scrunched together.

It is difficult to write the compound test functionality without having some sort of unit testing to verify success or failure against. For this reason a unit testing library should be added.

• Install Jest
• Set up unit tests for calculating compound interest

Deleting years from input crashes the app.