Class CancellablePromise<T>

This example shows off how TypeDoc handles

Complex method signatures
Static methods
A method with 10 overload signatures. Wow!
- Only the implementation signature has a doc comment. TypeDoc automatically copies the comment from the implementation signature to each of the visible signatures if they don't have one.

A promise with a cancel method. If canceled, the CancellablePromise will reject with a Cancellation object. Originally from real-cancellable-promise.

Type Parameters

T
what the CancellablePromise resolves to

Index

Constructors

constructor

Properties

promise cancel

Methods

Descriptions can be added for groups with @groupDescription, which will show up in the index where groups are listed. This works for both manually created groups which are created with @group, and implicit groups like the Methods group that this description is attached to.

then catch finally resolve reject all allSettled race delay

Constructors

constructor

new CancellablePromise<T>(promise, cancel): CancellablePromise<T>
Type Parameters
- T
Parameters
- promise: PromiseLike<T>
 a normal promise or thenable
- cancel: ((reason?) => void)
 a function that cancels promise. Calling cancel after promise has resolved must be a no-op.
 - - (reason?): void
 - Parameters
 Optional reason: string
 Returns void
Returns CancellablePromise<T>
- Defined in example/src/classes/CancellablePromise.ts:76

Properties

`Protected` `Readonly` promise

promise: Promise<T>

As a consumer of the library, you shouldn't ever need to access CancellablePromise.promise directly.

If you are subclassing CancellablePromise for some reason, you can access this property.

`Readonly` cancel

cancel: ((reason?) => void)

Cancel the CancellablePromise.

Type declaration

- (reason?): void
- Parameters
  - Optional reason: string
  Returns void

Methods

then

then<TResult1, TResult2>(onFulfilled?, onRejected?): CancellablePromise<TResult1 | TResult2>
Analogous to Promise.then.

onFulfilled on onRejected can return a value, a normal promise, or a CancellablePromise. So you can make a chain a CancellablePromises like this:
```
const overallPromise = cancellableAsyncFunction1()
 .then(cancellableAsyncFunction2)
 .then(cancellableAsyncFunction3)
 .then(cancellableAsyncFunction4)
```
Then if you call overallPromise.cancel, cancel is called on all CancellablePromises in the chain! In practice, this means that whichever async operation is in progress will be canceled.
Type Parameters
- TResult1 = T
- TResult2 = never
Parameters
- Optional onFulfilled: null | ((value) => TResult1 | PromiseLike<TResult1>)
- Optional onRejected: null | ((reason) => TResult2 | PromiseLike<TResult2>)
Returns CancellablePromise<TResult1 | TResult2>
a new CancellablePromise
- Defined in example/src/classes/CancellablePromise.ts:101

catch

catch<TResult>(onRejected?): CancellablePromise<T | TResult>
Analogous to Promise.catch.
Type Parameters
- TResult = never
Parameters
- Optional onRejected: null | ((reason) => TResult | PromiseLike<TResult>)
Returns CancellablePromise<T | TResult>
- Defined in example/src/classes/CancellablePromise.ts:152

finally

finally(onFinally?): CancellablePromise<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
- Optional onFinally: null | (() => void)
 The callback to execute when the Promise is settled (fulfilled or rejected).
Returns CancellablePromise<T>
A Promise for the completion of the callback.
- Defined in example/src/classes/CancellablePromise.ts:169

`Static` resolve

resolve(): CancellablePromise<void>
Analogous to Promise.resolve.

The returned promise should resolve even if it is canceled. The idea is that the promise is resolved instantaneously, so by the time the promise is canceled, it has already resolved.

Returns CancellablePromise<void>
- Defined in example/src/classes/CancellablePromise.ts:185
resolve<T>(value): CancellablePromise<T>
Type Parameters
- T
Parameters
- value: T
Returns CancellablePromise<T>
- Defined in example/src/classes/CancellablePromise.ts:187

`Static` reject

reject<T>(reason?): CancellablePromise<T>
Analogous to Promise.reject.

Like CancellablePromise.resolve, canceling the returned CancellablePromise is a no-op.
Type Parameters
- T
Parameters
- Optional reason: unknown
 this should probably be an Error object
Returns CancellablePromise<T>
- Defined in example/src/classes/CancellablePromise.ts:201

`Static` all

all<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values): CancellablePromise<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>
Analogous to Promise.all.
Type Parameters
- T1
- T2
- T3
- T4
- T5
- T6
- T7
- T8
- T9
- T10
Parameters
- values: readonly [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>]
 an array that may contain CancellablePromises, promises, thenables, and resolved values
Returns CancellablePromise<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>
a CancellablePromise, which, if canceled, will cancel each of the promises passed in to CancellablePromise.all.
- Defined in example/src/classes/CancellablePromise.ts:205
all<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values): CancellablePromise<[T1, T2, T3, T4, T5, T6, T7, T8, T9]>
Analogous to Promise.all.
Type Parameters
- T1
- T2
- T3
- T4
- T5
- T6
- T7
- T8
- T9
Parameters
- values: readonly [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>]
 an array that may contain CancellablePromises, promises, thenables, and resolved values
Returns CancellablePromise<[T1, T2, T3, T4, T5, T6, T7, T8, T9]>
a CancellablePromise, which, if canceled, will cancel each of the promises passed in to CancellablePromise.all.
- Defined in example/src/classes/CancellablePromise.ts:220
all<T1, T2, T3, T4, T5, T6, T7, T8>(values): CancellablePromise<[T1, T2, T3, T4, T5, T6, T7, T8]>
Analogous to Promise.all.
Type Parameters
- T1
- T2
- T3
- T4
- T5
- T6
- T7
- T8
Parameters
- values: readonly [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>]
 an array that may contain CancellablePromises, promises, thenables, and resolved values
Returns CancellablePromise<[T1, T2, T3, T4, T5, T6, T7, T8]>
a CancellablePromise, which, if canceled, will cancel each of the promises passed in to CancellablePromise.all.
- Defined in example/src/classes/CancellablePromise.ts:234
all<T1, T2, T3, T4, T5, T6, T7>(values): CancellablePromise<[T1, T2, T3, T4, T5, T6, T7]>
Analogous to Promise.all.
Type Parameters
- T1
- T2
- T3
- T4
- T5
- T6
- T7
Parameters
- values: readonly [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>]
 an array that may contain CancellablePromises, promises, thenables, and resolved values
Returns CancellablePromise<[T1, T2, T3, T4, T5, T6, T7]>
a CancellablePromise, which, if canceled, will cancel each of the promises passed in to CancellablePromise.all.
- Defined in example/src/classes/CancellablePromise.ts:247
all<T1, T2, T3, T4, T5, T6>(values): CancellablePromise<[T1, T2, T3, T4, T5, T6]>
Analogous to Promise.all.
Type Parameters
- T1
- T2
- T3
- T4
- T5
- T6
Parameters
- values: readonly [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>]
 an array that may contain CancellablePromises, promises, thenables, and resolved values
Returns CancellablePromise<[T1, T2, T3, T4, T5, T6]>
a CancellablePromise, which, if canceled, will cancel each of the promises passed in to CancellablePromise.all.
- Defined in example/src/classes/CancellablePromise.ts:259
all<T1, T2, T3, T4, T5>(values): CancellablePromise<[T1, T2, T3, T4, T5]>
Analogous to Promise.all.
Type Parameters
- T1
- T2
- T3
- T4
- T5
Parameters
- values: readonly [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>]
 an array that may contain CancellablePromises, promises, thenables, and resolved values
Returns CancellablePromise<[T1, T2, T3, T4, T5]>
a CancellablePromise, which, if canceled, will cancel each of the promises passed in to CancellablePromise.all.
- Defined in example/src/classes/CancellablePromise.ts:270
all<T1, T2, T3, T4>(values): CancellablePromise<[T1, T2, T3, T4]>
Analogous to Promise.all.
Type Parameters
- T1
- T2
- T3
- T4
Parameters
- values: readonly [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>]
 an array that may contain CancellablePromises, promises, thenables, and resolved values
Returns CancellablePromise<[T1, T2, T3, T4]>
a CancellablePromise, which, if canceled, will cancel each of the promises passed in to CancellablePromise.all.
- Defined in example/src/classes/CancellablePromise.ts:280
all<T1, T2, T3>(values): CancellablePromise<[T1, T2, T3]>
Analogous to Promise.all.
Type Parameters
- T1
- T2
- T3
Parameters
- values: readonly [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>]
 an array that may contain CancellablePromises, promises, thenables, and resolved values
Returns CancellablePromise<[T1, T2, T3]>
a CancellablePromise, which, if canceled, will cancel each of the promises passed in to CancellablePromise.all.
- Defined in example/src/classes/CancellablePromise.ts:289
all<T1, T2>(values): CancellablePromise<[T1, T2]>
Analogous to Promise.all.
Type Parameters
- T1
- T2
Parameters
- values: readonly [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>]
 an array that may contain CancellablePromises, promises, thenables, and resolved values
Returns CancellablePromise<[T1, T2]>
a CancellablePromise, which, if canceled, will cancel each of the promises passed in to CancellablePromise.all.
- Defined in example/src/classes/CancellablePromise.ts:297
all<T>(values): CancellablePromise<T[]>
Analogous to Promise.all.
Type Parameters
- T
Parameters
- values: readonly (T | PromiseLike<T>)[]
 an array that may contain CancellablePromises, promises, thenables, and resolved values
Returns CancellablePromise<T[]>
a CancellablePromise, which, if canceled, will cancel each of the promises passed in to CancellablePromise.all.
- Defined in example/src/classes/CancellablePromise.ts:301

`Static` allSettled

allSettled<T>(values): CancellablePromise<{
 -readonly [P in string | number | symbol]: PromiseSettledResult<T[P] extends PromiseLike
 ? U
 : T[P]>
}>
Creates a CancellablePromise that is resolved with an array of results when all of the provided Promises resolve or reject.
Type Parameters
- T extends readonly unknown[] | readonly [unknown]
Parameters
- values: T
 An array of Promises.
Returns CancellablePromise<{
 -readonly [P in string | number | symbol]: PromiseSettledResult<T[P] extends PromiseLike
 ? U
 : T[P]>
}>
A new CancellablePromise.
- Defined in example/src/classes/CancellablePromise.ts:327
allSettled<T>(values): CancellablePromise<PromiseSettledResult<T extends PromiseLike
? U
: T>[]>
Creates a CancellablePromise that is resolved with an array of results when all of the provided Promises resolve or reject.
Type Parameters
- T
Parameters
- values: Iterable<T>
 An array of Promises.
Returns CancellablePromise<PromiseSettledResult<T extends PromiseLike
? U
: T>[]>
A new CancellablePromise. Canceling it cancels all of the input promises.
- Defined in example/src/classes/CancellablePromise.ts:343

`Static` race

race<T>(values): CancellablePromise<Awaited<T>>
Creates a CancellablePromise that is resolved or rejected when any of the provided Promises are resolved or rejected.
Type Parameters
- T
Parameters
- values: readonly T[]
 An array of Promises.
Returns CancellablePromise<Awaited<T>>
A new CancellablePromise. Canceling it cancels all of the input promises.
- Defined in example/src/classes/CancellablePromise.ts:368

`Static` delay

delay(ms): CancellablePromise<void>
Parameters
- ms: number
Returns CancellablePromise<void>
a CancellablePromise that resolves after ms milliseconds.
- Defined in example/src/classes/CancellablePromise.ts:383

Class CancellablePromise<T>

Type Parameters

Index

Constructors

Properties

Methods

Constructors

constructor

Type Parameters

Parameters

Parameters

Returns void

Returns CancellablePromise<T>

Properties

Protected Readonly promise

Readonly cancel

Type declaration

Parameters

Returns void

Methods

then

Type Parameters

Parameters

Returns CancellablePromise<TResult1 | TResult2>

catch

Type Parameters

Parameters

Returns CancellablePromise<T | TResult>

finally

Parameters

Returns CancellablePromise<T>

Static resolve

Returns CancellablePromise<void>

Type Parameters

Parameters

Returns CancellablePromise<T>

Static reject

Type Parameters

Parameters

Returns CancellablePromise<T>

Static all

Type Parameters

Parameters

Returns CancellablePromise<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>

Type Parameters

Parameters

Returns CancellablePromise<[T1, T2, T3, T4, T5, T6, T7, T8, T9]>

Type Parameters

Parameters

Returns CancellablePromise<[T1, T2, T3, T4, T5, T6, T7, T8]>

Type Parameters

Parameters

Returns CancellablePromise<[T1, T2, T3, T4, T5, T6, T7]>

Type Parameters

Parameters

Returns CancellablePromise<[T1, T2, T3, T4, T5, T6]>

Type Parameters

Parameters

Returns CancellablePromise<[T1, T2, T3, T4, T5]>

Type Parameters

Parameters

Returns CancellablePromise<[T1, T2, T3, T4]>

Type Parameters

Parameters

Returns CancellablePromise<[T1, T2, T3]>

Type Parameters

Parameters

Returns CancellablePromise<[T1, T2]>

Type Parameters

Parameters

Returns CancellablePromise<T[]>

Static allSettled

Type Parameters

Parameters

Returns CancellablePromise<{ -readonly [P in string | number | symbol]: PromiseSettledResult<T[P<P>] extends PromiseLike<U> ? U : T[P<P>]>}>

Type Parameters

Parameters

Returns CancellablePromise<PromiseSettledResult<T extends PromiseLike<U> ? U : T>[]>

Static race

Type Parameters

`Protected` `Readonly` promise

`Readonly` cancel

`Static` resolve

`Static` reject

`Static` all

`Static` allSettled

Returns CancellablePromise<{
-readonly [P in string | number | symbol]: PromiseSettledResult<T[P<P>] extends PromiseLike<U>
? U
: T[P<P>]>
}>

Returns CancellablePromise<PromiseSettledResult<T extends PromiseLike<U>
? U
: T>[]>

`Static` race

`Static` delay