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akihisa-shimada/method_generics.tsx

Created December 17, 2021 22:47
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method_generics.tsx
const fetcher = async<T>(url: string): Promise<T> => {
const res = await fetch(url).then<T>(res => res.json());
return res;
}
export const getUser = async(): Promise<{id: number, name: string}> => {
const user = await fetcher<{id: number, name: string}>('https://example.com/api/user');
return user;
}
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