FAST: ApolloSubscription

ApolloSubscription inherits from ApolloElement and implements the ApolloSubscriptionInterface.

Read the subscription component guides for examples and tips.

Exports

import { ApolloSubscription } from '@apollo-elements/fast/apollo-subscription';

Properties

client

inherited from ApolloElementInterface

ApolloClient<NormalizedCacheObject> | null

The Apollo Client instance

Defaults to window.__APOLLO_CLIENT__, which is set by default when creating an Apollo Client. That means that in most cases, it's not necessary to explicity set the client property. For more information see Getting Started: Apollo Client.

context

(optional) inherited from ApolloElementInterface

Record<string, unknown>

Context passed to the link execution chain.

data

inherited from ApolloElementInterface

Data<D> | null

Latest subscription data.

document

inherited from ApolloElementInterface

DocumentNode | TypedDocumentNode | null

A GraphQL document containing a single query, mutation, or subscription. You can set it as a JavaScript property or by appending a GraphQL script to the element (light DOM).

static

documentType

inherited from ApolloElementInterface

'subscription'

Hint that this is a subscription component

error

(optional) inherited from ApolloElementInterface

Error | ApolloError | null

Latest error

errors

(optional) inherited from ApolloElementInterface

readonly GraphQLError[] | null

Latest errors.

fetchPolicy

inherited from ApolloSubscriptionInterface

FetchPolicy

Specifies the FetchPolicy to be used for this subscription.

loading

inherited from ApolloElementInterface

boolean

Whether a request is in-flight.

noAutoSubscribe

inherited from ApolloSubscriptionInterface no-auto-subscribe

boolean

If true, the element will not begin querying data until you manually call subscribe

notifyOnNetworkStatusChange

inherited from ApolloSubscriptionInterface

boolean

Whether or not updates to the network status should trigger next on the observer of this subscription.

observable

(optional) inherited from ApolloSubscriptionInterface

Observable<FetchResult<Data<D>>>

Observable watching this element's subscription.

observableSubscription

inherited from ApolloSubscriptionInterface

ZenObservable.Subscription

Subscription to the observable

pollInterval

(optional) inherited from ApolloSubscriptionInterface

number

The time interval (in milliseconds) on which this subscription should be refetched from the server.

shouldResubscribe

inherited from ApolloSubscriptionInterface

boolean | ((options: SubscriptionDataOptions<D, V>) => boolean)

Determines if your subscription should be unsubscribed and subscribed again.

skip

inherited from ApolloSubscriptionInterface

boolean

If skip is true, the query will be skipped entirely

subscription

inherited from ApolloSubscriptionInterface

DocumentNode | TypedDocumentNode

A GraphQL document containing a single subscription. You can set it as a JavaScript property or by appending a GraphQL script to the element (light DOM).

<script type="application/graphql">
  subscription { messages { text } }
</script>

variables

inherited from ApolloElementInterface

Variables<D, V> | null

An object map from variable name to variable value, where the variables are used within the GraphQL subscription. If the element has not yet subscribed and noAutoSubscribe is not set, setting variables causes the element to subscribe, otherwise, setting variables causes the query to refetch.

Methods

cancel

inherited from ApolloSubscriptionInterface

Cancels and clears the subscription

Returns

void

protected

documentChanged

(optional) inherited from ApolloElementInterface

Lifecycle callback that reacts to changes in the GraphQL document.

Parameters

document

DocumentNode | TypedDocumentNode | null

The GraphQL document.

Returns

void

onError

(optional) inherited from ApolloSubscriptionInterface

Callback for when an error occurs.

Parameters

error

Error

Returns

void

onSubscriptionComplete

(optional) inherited from ApolloSubscriptionInterface

Callback for when subscription completes.

Returns

void

onSubscriptionData

(optional) inherited from ApolloSubscriptionInterface

Callback for when subscription data updates.

Parameters

data

Data<D>

Returns

void

protected

shouldSubscribe

inherited from ApolloSubscriptionInterface

Determines whether the element should attempt to subscribe i.e. begin querying Override to prevent subscribing unless your conditions are met

Parameters

options

Partial<SubscriptionOptions<Variables<D, V>, Data<D>>>

Property	Type	Description
query	`DocumentNode \| TypedDocumentNode`	See query
variables	`Variables<D, V>`	See variables
fetchPolicy	`FetchPolicy`	See fetchPolicy
errorPolicy	`ErrorPolicy`	See errorPolicy
context	`Record<string, unknown>`	Context object passed through the link execution chain.

Returns

boolean

inherited from ApolloSubscriptionInterface

Resets the observable and subscribes.

params

Partial<SubscriptionDataOptions<D, V>>

Options for controlling how the subscription subscribes.

Option	Type	Description
client	`ApolloClient`	Apollo Client to use for the subscription.
fetchPolicy	`FetchPolicy`	See fetchPolicy
shouldResubscribe	`boolean`	Boolean, or a predicate function of `SubscriptionDataOptions` that determines if your subscription should be unsubscribed and subscribed again
skip	`boolean`	If skip is true, the subscription will be skipped entirely.
subscription	`DocumentNode \| TypedDocumentNode`	GraphQL document with a single subscription.
variables	`Variables<D, V>`	An object containing all of the variables your subscription needs to execute.

void

protected

variablesChanged

(optional) inherited from ApolloElementInterface

Lifecycle callback that reacts to changes in the operation variables.

Parameters

variables

Variables<D, V> | null

The variables.

Returns

void

Events

Name	Type	Description
apollo-element-connected	`CustomEvent<ApolloElement>`	when the element connects to the DOM
apollo-element-disconnected	`CustomEvent<ApolloElement>`	when the element disconnects from the DOM
apollo-error	`CustomEvent<ApolloError>`	when the mutation rejects
apollo-subscription-result	`CustomEvent<FetchResult<Data<D>>>`	when the subscription resolves

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