Method then

packages/shared/ReactTypes.js:100–100

(onFulfill: () => mixed, onReject: () => mixed)

// This doesn't require a value to be passed to either handler.
export interface Wakeable {
  then(onFulfill: () => mixed, onReject: () => mixed): void | Wakeable;
}

// The subset of a Promise that React APIs rely on. This resolves a value.