Build the Tool

Stop doing the check by hand. These exercises are about writing the thing that does it for you, forever — the highest-leverage move available and the one nobody teaches, because it looks hard to grade. It is not: a tool either processes its cases or it does not.

Build the tool: check every usage against the props table

intermediatechallenge

The wrong props for an internal Button feel type-checked because they are famous, not because they are right. The props table exists. Write the rule that holds every usage to it.