Class AsyncItem<T>

Readonly[toStringTag]

Static Readonly[species]

catch

• catch<TResult = never>(
      onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null,
  ): Promise<T | TResult>

  Attaches a callback for only the rejection of the Promise.

  Type Parameters

  • TResult = never

  Parameters

  • Optionalonrejected: ((reason: any) => TResult | PromiseLike<TResult>) | null

    The callback to execute when the Promise is rejected.

  Returns Promise<T | TResult>

  A Promise for the completion of the callback.

finally

• finally(onfinally?: (() => void) | null): Promise<T>

  Attaches a callback that is invoked when the Promise is settled (fulfilled or rejected). The resolved value cannot be modified from the callback.

  Parameters

  • Optionalonfinally: (() => void) | null

    The callback to execute when the Promise is settled (fulfilled or rejected).

  Returns Promise<T>

  A Promise for the completion of the callback.

then

• then<TResult1 = T, TResult2 = never>(
      onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | null,
      onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null,
  ): Promise<TResult1 | TResult2>

  Attaches callbacks for the resolution and/or rejection of the Promise.

  Type Parameters

  • TResult1 = T
  • TResult2 = never

  Parameters

  • Optionalonfulfilled: ((value: T) => TResult1 | PromiseLike<TResult1>) | null

    The callback to execute when the Promise is resolved.

  • Optionalonrejected: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null

    The callback to execute when the Promise is rejected.

  Returns Promise<TResult1 | TResult2>

  A Promise for the completion of which ever callback is executed.

Staticall

• all<T>(values: Iterable<T | PromiseLike<T>>): Promise<Awaited<T>[]>

  Creates a Promise that is resolved with an array of results when all of the provided Promises resolve, or rejected when any Promise is rejected.

  Type Parameters

  • T

  Parameters

  • values: Iterable<T | PromiseLike<T>>

    An iterable of Promises.

  Returns Promise<Awaited<T>[]>

  A new Promise.

• all<T extends [] | readonly unknown[]>(
      values: T,
  ): Promise<{ -readonly [P in string | number | symbol]: Awaited<T[P]> }>

  Creates a Promise that is resolved with an array of results when all of the provided Promises resolve, or rejected when any Promise is rejected.

  Type Parameters

  • T extends [] | readonly unknown[]

  Parameters

  • values: T

    An array of Promises.

  Returns Promise<{ -readonly [P in string | number | symbol]: Awaited<T[P]> }>

  A new Promise.

StaticallSettled

• allSettled<T extends [] | readonly unknown[]>(
      values: T,
  ): Promise<
      {
          -readonly [P in string
          | number
          | symbol]: PromiseSettledResult<Awaited<T[P]>>
      },
  >

  Creates a Promise that is resolved with an array of results when all of the provided Promises resolve or reject.

  Type Parameters

  • T extends [] | readonly unknown[]

  Parameters

  • values: T

    An array of Promises.

  Returns Promise<
      {
          -readonly [P in string
          | number
          | symbol]: PromiseSettledResult<Awaited<T[P]>>
      },
  >

  A new Promise.

• allSettled<T>(
      values: Iterable<T | PromiseLike<T>>,
  ): Promise<PromiseSettledResult<Awaited<T>>[]>

  Creates a Promise that is resolved with an array of results when all of the provided Promises resolve or reject.

  Type Parameters

  • T

  Parameters

  • values: Iterable<T | PromiseLike<T>>

    An array of Promises.

  Returns Promise<PromiseSettledResult<Awaited<T>>[]>

  A new Promise.

Staticrace

• race<T>(values: Iterable<T | PromiseLike<T>>): Promise<Awaited<T>>

  Creates a Promise that is resolved or rejected when any of the provided Promises are resolved or rejected.

  Type Parameters

  • T

  Parameters

  • values: Iterable<T | PromiseLike<T>>

    An iterable of Promises.

  Returns Promise<Awaited<T>>

  A new Promise.

• race<T extends [] | readonly unknown[]>(values: T): Promise<Awaited<T[number]>>

  Creates a Promise that is resolved or rejected when any of the provided Promises are resolved or rejected.

  Type Parameters

  • T extends [] | readonly unknown[]

  Parameters

  • values: T

    An array of Promises.

  Returns Promise<Awaited<T[number]>>

  A new Promise.

Staticreject

• reject<T = never>(reason?: any): Promise<T>

  Creates a new rejected promise for the provided reason.

  Type Parameters

  • T = never

  Parameters

  • Optionalreason: any

    The reason the promise was rejected.

  Returns Promise<T>

  A new rejected Promise.

Staticresolve

• resolve(): Promise<void>

  Creates a new resolved promise.

  Returns Promise<void>

  A resolved promise.

• resolve<T>(value: T): Promise<Awaited<T>>

  Creates a new resolved promise for the provided value.

  Type Parameters

  • T

  Parameters

  • value: T

    A promise.

  Returns Promise<Awaited<T>>

  A promise whose internal state matches the provided promise.

• resolve<T>(value: T | PromiseLike<T>): Promise<Awaited<T>>

  Creates a new resolved promise for the provided value.

  Type Parameters

  • T

  Parameters

  • value: T | PromiseLike<T>

    A promise.

  Returns Promise<Awaited<T>>

  A promise whose internal state matches the provided promise.