withResolvers.ts

utils/withResolvers.ts

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withResolvers

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promiseresolverejectwithresolversnodevoidpolyfilles2024packagejson

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/**
 * Polyfill for Promise.withResolvers() (ES2024, Node 22+).
 * package.json declares "engines": { "node": ">=18.0.0" } so we can't use the native one.
 */
export function withResolvers<T>(): PromiseWithResolvers<T> {
  let resolve!: (value: T | PromiseLike<T>) => void
  let reject!: (reason?: unknown) => void
  const promise = new Promise<T>((res, rej) => {
    resolve = res
    reject = rej
  })
  return { promise, resolve, reject }
}