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Andrew Clark
d9a3cc070c
We may want to change the protocol later, so until then we'll be restrictive. Heuristic is to check for existence of `default`.
43 lines
1009 B
JavaScript
43 lines
1009 B
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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*/
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export type Thenable<T, R> = {
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then(resolve: (T) => mixed, reject: (mixed) => mixed): R,
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};
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export type LazyComponent<T> = {
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$$typeof: Symbol | number,
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_ctor: () => Thenable<{default: T}, mixed>,
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_status: 0 | 1 | 2,
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_result: any,
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};
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type ResolvedLazyComponent<T> = {
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$$typeof: Symbol | number,
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_ctor: () => Thenable<{default: T}, mixed>,
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_status: 1,
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_result: any,
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};
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export const Pending = 0;
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export const Resolved = 1;
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export const Rejected = 2;
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export function getResultFromResolvedLazyComponent<T>(
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lazyComponent: ResolvedLazyComponent<T>,
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): T {
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return lazyComponent._result;
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}
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export function refineResolvedLazyComponent<T>(
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lazyComponent: LazyComponent<T>,
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): ResolvedLazyComponent<T> | null {
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return lazyComponent._status === Resolved ? lazyComponent._result : null;
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}
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