SolidJS•12mo ago

Favorite way of dealing with typescripts `!`-forbidden warnings

For example, I often do:

const MiddleContainer: ParentComponent = (props) => {
  const { isAuthenticated } = useAuthState()!;

const MiddleContainer: ParentComponent = (props) => {
  const { isAuthenticated } = useAuthState()!;

I know my code is wrapped in an AuthContextProvider, and I want it to crash/error out in case I ever miss the context provider. How do you tell typescript-eslint to shut up about these cases?

3 Replies

Tommypop•12mo ago

I think you can just throw if context is null in the useAuthState function

Bersaelor•12mo ago

Yes:

// if we forget to wrap AppContextProvider around our app, throw an error
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
const useAppState = () => { return useContext(AppContext)! }

// if we forget to wrap AppContextProvider around our app, throw an error
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
const useAppState = () => { return useContext(AppContext)! }

Tommypop•12mo ago

export const useThemeContext = () => {
    const ctx = useContext(ThemeContext);
    if (!ctx) {
        throw Error("No context found");
    }
    return ctx;
};

export const useThemeContext = () => {
    const ctx = useContext(ThemeContext);
    if (!ctx) {
        throw Error("No context found");
    }
    return ctx;
};

This is what I use

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Favorite way of dealing with typescripts `!`-forbidden warnings