8/10 React, TypeScript, and TDD Tutorial: Class State

Make a very simple class component with local counter state, then make a type definition for that state.

Contents:
00:19 - Write a failing test for a stateful counter
03:56 - Add readonly type information for the state
06:18 - Provide a starting value
09:46 - Wire into the UI

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Category: #webstorm, #webstormtutorial, #javascript