Type Safety Problem While Using TypeScript with React
Understand the type safety problems encountered when integrating TypeScript with React's Context API, including the challenges of initial context values. Learn practical solutions such as type assertions to maintain type safety without sacrificing code quality, enabling better state management in React applications.
We'll cover the following...
The fundamental problem
The core issue on our side is not necessarily a TypeScript problem. It’s a React problem:
When we call
React.createContext, TypeScript will want to know what value we can expect.But we don’t have that value yet because we have to wait for the
Providercomponent to mount to useuseState.TypeScript will consider this an issue because we’re passing it something that isn’t what it expects.
If we say it can be a color or
undefined, TypeScript will never be sure which one it’s working with. ...