@apollo/client/utilities/internal/types/SignatureStyle.d.ts

A fully-featured caching GraphQL client.

import type { ApolloClient, TypeOverrides } from "@apollo/client";
/**
 * Signature style used for `ApolloClient` methods and hooks.
 * Classic signatures are method signatures in place until 4.1.
 * Modern signatures are the method signatures introduced in 4.1,
 * which are more accurate and take global `defaultOptions` into account.
 * Modern signatures require type inference and don't allow manually specified
 * generic arguments. Users need to opt into them, either by explicitly declaring
 * their signature style or by using `defaultOptions`.
 */
export type SignatureStyle = TypeOverrides extends ({
    signatureStyle: infer S extends "modern" | "classic";
}) ? S : ApolloClient.Options extends {
    defaultOptions: {};
} ? "modern" : "classic";
/**
 * A type to disable "classic" signatures when "modern" signatures are in use.
 * Modern signatures are always active, as they are more complete than classic
 * signatures, but they are defined after the classic signatures, so while
 * classic signatures are active, TypeScript will not reach the modern signatures
 * as long as a classic signature can be satisfied.
 */
export type ClassicSignature = SignatureStyle extends "classic" ? unknown : never;
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