Monday, 11 January, 2021 UTC


So far our reducers have simply been used to update a single value passed in with an action. In this lesson we'll practice adding more logic into a reducer, which is recommended in the [redux style guide]( We will do this by removing a hard coded list of supported currencies to update based on the API call that we make. One of the techniques we'll cover is using curly braces (`{` and `}`) to create [blocks]( inside of our `switch` statement, so that the variables we make while responding to an action don't leak into the outer scope.