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createFetchApi()

Home > @backstage/core-app-api > createFetchApi

Builds a fetch API, based on the builtin fetch wrapped by a set of optional middleware implementations that add behaviors.

Signature:

function createFetchApi(options: {
    baseImplementation?: typeof fetch | undefined;
    middleware?: FetchMiddleware | FetchMiddleware[] | undefined;
}): FetchApi;

Parameters​

ParameterTypeDescription
options{ baseImplementation?: typeof fetch | undefined; middleware?: FetchMiddleware | FetchMiddleware[] | undefined; }

Returns:

FetchApi

Remarks​

The middleware are applied in reverse order, i.e. the last one will be "closest" to the base implementation. Passing in [M1, M2, M3] effectively leads to M1(M2(M3(baseImplementation))).