Subscriptions

GraphQL Subscriptions are a mechanism which allows clients to subscribe to changes in a piece of data from the server, and get notified whenever that data changes.

In Svelte Relay, you can create a GraphQL subscription with the getSubcription() function.

User.svelte

<script>    import { getSubscription, getQuery, graphql } from 'svelte-relay';
    getSubscription({        subscription: graphql`            subscription UserUpdatedSubscription {                viewer {                    id                    firstName                    lastName                }            }        `;    });
    const query = getQuery(graphql`        query UserQuery {            viewer {                id                firstName                lastName            }        }    `);</script>
{#await $query then data}    <div>Welcome, {data.firstName} {data.lastName}</div>{/await}

For more information about the configuration object that can be passed to the getSubscription() function, refer to the Relay documentation.