Apollo Runes

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Error Handling ​

apollo-runes surfaces Apollo errors directly on operation instances.

Queries ​

svelte
{#if query.error}
  <p>GraphQL error: {query.error.message}</p>
{/if}

Mutations ​

ts
const create = new Mutation(CREATE, {
  onError(error) { console.error(error); },
  errorPolicy: 'all'
});

try {
  await create.mutate({ input });
} catch (e) {
  // network or thrown error
}

Subscriptions ​

svelte
{#if sub.error}
  Error: {sub.error.message}
{/if}

See Apollo guidance on error policies and patterns: Error handling.