react-query/packages/svelte-query/tests/useMutationState/BaseExample.svelte

<script lang="ts">
  import { QueryClient } from '@tanstack/query-core'
  import {
    createMutation,
    setQueryClientContext,
    useMutationState,
  } from '../../src/index.js'
  import type {
    CreateMutationOptions,
    MutationStateOptions,
  } from '../../src/types.js'

  export let successMutationOpts: CreateMutationOptions
  export let errorMutationOpts: CreateMutationOptions
  export let mutationStateOpts: MutationStateOptions | undefined = undefined

  const queryClient = new QueryClient()
  setQueryClientContext(queryClient)

  const successMutation = createMutation(successMutationOpts)
  const errorMutation = createMutation(errorMutationOpts)

  const mutationState = useMutationState(mutationStateOpts)
  $: statuses = $mutationState.map((state) => state.status)
</script>

<div data-testid="result">
  {JSON.stringify(statuses)}
</div>

<button on:click={() => $successMutation.mutate()}>success</button>
<button on:click={() => $errorMutation.mutate()}>error</button>