The try-catch statement in Typescript is generating an inconsistent return error

I've encountered an issue with a TypeScript function that is flagging inconsistent return error. The function includes a try block that returns a value and a catch block that throws an error, resulting in the inconsistency. I am struggling to find a workaround for this situation.

async function someFunction(): Promise<Course> {
    try {
        // Implementing code logic to generate a Course object
        return courseObject;
    } catch (error) {
        throw new ApolloError(....);
    }
}

Answer №1

Your function does not qualify as an async function, yet it is expected to yield a Promise. To address this, you must envelop the return value and error within Promises:

function someFunction(): Promise<Course> {
    try {
        // implement code logic to generate a Course object
        return Promise.resolve(courseObject);
    } catch (error) {
        return Promise.reject(new ApolloError(...));
    }
}

Alternatively, convert your function into an async one:

async function someFunction(): Promise<Course> {
    try {
        // introduce code logic for creating a Course object
        return courseObject;
    } catch (error) {
        throw new ApolloError(...);
    }
}

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