SPA Hooks

Run Durably entirely in the browser using SQLite WASM with OPFS persistence. Jobs execute client-side with data stored in the browser's Origin Private File System.

tsx

import {
  DurablyProvider,
  useDurably,
  useJob,
  useJobRun,
  useJobLogs,
  useRuns,
} from '@coji/durably-react/spa'

DurablyProvider

Wraps your app and initializes Durably with a browser SQLite database.

tsx

import { DurablyProvider } from '@coji/durably-react/spa'
import { createDurably } from '@coji/durably'
import { SQLocalKysely } from 'sqlocal/kysely'

const sqlocal = new SQLocalKysely('app.sqlite3')

const durably = createDurably({
  dialect: sqlocal.dialect,
  pollingIntervalMs: 100,
  maxConcurrentRuns: 1, // default; raise to process multiple runs concurrently (storage still enforces concurrencyKey)
  jobs: {
    myJob: myJobDef,
  },
})

await durably.init()

function App() {
  return (
    <DurablyProvider durably={durably} fallback={<p>Loading...</p>}>
      <MyComponent />
    </DurablyProvider>
  )
}

Props

Prop	Type	Default	Description
`durably`	`Durably \| Promise<Durably>`	required	Durably instance or Promise
`autoStart`	`boolean`	`true`	Auto-start worker on mount
`onReady`	`(durably: Durably) => void`	-	Callback when ready
`fallback`	`ReactNode`	-	Loading fallback (wraps in Suspense)

useDurably

Access the Durably instance directly.

tsx

import { useDurably } from '@coji/durably-react/spa'

function Component() {
  const { durably, isReady, error } = useDurably()

  if (!isReady) return <div>Loading...</div>
  if (error) return <div>Error: {error.message}</div>

  // Use durably instance directly
  const runs = await durably.storage.getRuns()
}

Return Type

Property	Type	Description
`durably`	`Durably \| null`	The Durably instance
`isReady`	`boolean`	Whether Durably is initialized
`error`	`Error \| null`	Initialization error

useJob

Trigger and monitor a job. Pass a JobDefinition to get type-safe input/output.

tsx

import { defineJob } from '@coji/durably'
import { useJob } from '@coji/durably-react/spa'
import { z } from 'zod'

const myJob = defineJob({
  name: 'my-job',
  input: z.object({ value: z.string() }),
  output: z.object({ result: z.number() }),
  run: async (step, input) => {
    const data = await step.run('process', () => process(input.value))
    return { result: data.length }
  },
})

function Component() {
  const {
    trigger,
    triggerAndWait,
    status,
    output,
    error,
    logs,
    progress,
    isLeased,
    isPending,
    isCompleted,
    isFailed,
    isCancelled,
    isTerminal,
    isActive,
    isResolving,
    currentRunId,
    reset,
  } = useJob(myJob, {
    scope: { labels: { entityId: 'entity_123' } },
    triggerOptions: {
      labels: { entityId: 'entity_123' },
      concurrencyKey: 'entity:entity_123',
      coalesce: 'active',
    },
  })

  const handleClick = async () => {
    const { runId } = await trigger({ value: 'test' })
    console.log('Started:', runId)
  }

  return (
    <div>
      <button onClick={handleClick} disabled={isLeased}>
        Run
      </button>
      <p>Status: {status}</p>
      {progress && (
        <p>
          Progress: {progress.current}/{progress.total}
        </p>
      )}
      {isCompleted && <p>Result: {output?.result}</p>}
      {isFailed && <p>Error: {error}</p>}
      <button onClick={reset}>Reset</button>
    </div>
  )
}

Options

Option	Type	Default	Description
`initialRunId`	`string`	-	Track and hydrate this run immediately; skips scoped auto-resume
`autoResume`	`boolean`	`true`	Find a matching leased run, then a matching pending run, then a matching waiting run
`followLatest`	`boolean`	`true`	Follow matching trigger, coalesced, and leased events
`scope`	`{ labels: Record<string, string> }`	-	Require every label for resume and follow
`triggerOptions`	`TriggerOptions<Record<string,string>>`	-	Forward options to both `trigger` and `triggerAndWait`

Matching run:trigger events are followed while the new run is still pending. This is the pending-time follow behavior. Scope labels and trigger labels are independent, so supply both when a newly triggered run should match the hook. Scope changes clear the previous run and resolve the new scope. Inline option objects are compared by value.

Return Type

interface UseJobResult<TInput, TOutput> {
  trigger: (input: TInput) => Promise<{ runId: string }>
  triggerAndWait: (input: TInput) => Promise<{ runId: string; output: TOutput }>
  status: RunStatus | null
  output: TOutput | null
  error: string | null
  logs: LogEntry[]
  progress: Progress | null
  isLeased: boolean
  isPending: boolean
  isCompleted: boolean
  isFailed: boolean
  isCancelled: boolean
  isTerminal: boolean
  isActive: boolean
  isWaiting: boolean
  isResolving: boolean
  currentRunId: string | null
  reset: () => void
}

useJobRun

Subscribe to an existing run by ID.

tsx

import { useJobRun } from '@coji/durably-react/spa'

function RunMonitor({ runId }: { runId: string | null }) {
  const {
    status,
    output,
    error,
    progress,
    logs,
    isLeased,
    isCompleted,
    isFailed,
    isCancelled,
    isTerminal,
    isActive,
  } = useJobRun<{ result: number }>({ runId })

  if (!runId) return <div>No run selected</div>

  return (
    <div>
      <p>Status: {status}</p>
      {isCompleted && <p>Output: {JSON.stringify(output)}</p>}
    </div>
  )
}

Options

Option	Type	Description
`runId`	`string \| null`	The run ID to subscribe to

Return Type

Property	Type	Description
`status`	`RunStatus \| null`	Current run status
`output`	`TOutput \| null`	Output from completed run
`error`	`string \| null`	Error message from failed run
`logs`	`LogEntry[]`	Logs collected during execution
`progress`	`Progress \| null`	Current progress
`isLeased`	`boolean`	Whether the run is executing
`isPending`	`boolean`	Whether the run is queued
`isCompleted`	`boolean`	Whether the run completed
`isFailed`	`boolean`	Whether the run failed
`isCancelled`	`boolean`	Whether the run was cancelled
`isTerminal`	`boolean`	Terminal status (completed, failed, or cancelled)
`isActive`	`boolean`	Pending or leased
`isWaiting`	`boolean`	`true` when status is waiting

useJobLogs

Subscribe to logs from a run.

tsx

import { useJobLogs } from '@coji/durably-react/spa'

function LogViewer({ runId }: { runId: string | null }) {
  const { logs, clearLogs } = useJobLogs({
    runId,
    maxLogs: 100,
  })

  return (
    <div>
      <button onClick={clearLogs}>Clear Logs</button>
      <ul>
        {logs.map((log) => (
          <li key={log.id}>
            [{log.level}] {log.message}
            {log.data && <pre>{JSON.stringify(log.data)}</pre>}
          </li>
        ))}
      </ul>
    </div>
  )
}

Options

Option	Type	Description
`runId`	`string \| null`	The run ID to subscribe to
`maxLogs`	`number`	Maximum number of logs to keep

useRuns

List runs with optional filtering, pagination, and real-time updates.

The hook automatically subscribes to Durably events and refreshes the list when runs change. It listens to:

run:trigger, run:leased, run:waiting, run:complete, run:fail, run:cancel, run:delete - refresh list
run:progress - update progress in place
step:start, step:complete - refresh for step count updates

Generic type parameter (dashboard with multiple job types)

Use a type parameter to specify the run type for dashboards with multiple job types:

tsx

import { useRuns, TypedRun } from '@coji/durably-react/spa'

// Define your run types
type ImportRun = TypedRun<{ file: string }, { count: number }>
type SyncRun = TypedRun<{ userId: string }, { synced: boolean }>
type DashboardRun = ImportRun | SyncRun

function Dashboard() {
  const { runs } = useRuns<DashboardRun>({ pageSize: 10 })

  return (
    <ul>
      {runs.map((run) => (
        <li key={run.id}>
          {run.jobName}: {run.status}
          {/* Use jobName to narrow the type */}
          {run.jobName === 'import-csv' && run.output?.count}
        </li>
      ))}
    </ul>
  )
}

With JobDefinition (single job, auto-filters by jobName)

Pass a JobDefinition to get typed runs and auto-filter by job name:

tsx

import { defineJob } from '@coji/durably'
import { useRuns } from '@coji/durably-react/spa'

const myJob = defineJob({
  name: 'my-job',
  input: z.object({ value: z.string() }),
  output: z.object({ result: z.number() }),
  run: async (step, input) => {
    /* ... */
  },
})

function RunList() {
  const { runs } = useRuns(myJob, { status: 'completed', pageSize: 10 })

  return (
    <ul>
      {runs.map((run) => (
        <li key={run.id}>
          {/* run.output is typed as { result: number } | null */}
          Result: {run.output?.result}
        </li>
      ))}
    </ul>
  )
}

Without type parameter (untyped)

tsx

import { useRuns } from '@coji/durably-react/spa'

function RunList() {
  const { runs } = useRuns({ jobName: 'my-job', pageSize: 10 })

  return (
    <ul>
      {runs.map((run) => (
        <li key={run.id}>
          {/* run.output is unknown */}
          {run.jobName}: {run.status}
        </li>
      ))}
    </ul>
  )
}

Signatures

// With type parameter (dashboard)
useRuns<TRun>(options?)

// With JobDefinition (single job, auto-filters)
useRuns(jobDefinition, options?)

// Without type parameter (untyped)
useRuns(options?)

Options

Option	Type	Description
`jobName`	`string \| string[]`	Filter by job name(s) (only for untyped usage)
`status`	`RunStatus \| RunStatus[]`	Filter by status(es) — array matches any
`labels`	`Record<string, string>`	Filter by labels — all specified labels must match
`pageSize`	`number`	Number of runs per page (default: 10)
`realtime`	`boolean`	Subscribe to real-time updates (default: true)

Return Type

Property	Type	Description
`runs`	`TypedRun<TInput, TOutput>[]`	List of runs (typed when using JobDefinition)
`page`	`number`	Current page (0-indexed)
`hasMore`	`boolean`	Whether more pages exist
`isLoading`	`boolean`	Loading state
`nextPage`	`() => void`	Go to next page
`prevPage`	`() => void`	Go to previous page
`goToPage`	`(page: number) => void`	Go to specific page
`refresh`	`() => Promise<void>`	Manually refresh the list

isWaiting is true for suspended runs, including accepted input awaiting a lease. Waiting is nonterminal but is not included in isActive; use !isTerminal for unfinished work.

defineJob

Step Context

createDurably

Events

HTTP Handler

Fullstack Hooks

SPA Hooks

SPA Hooks

DurablyProvider

Props

useDurably

Return Type

useJob

Options

Return Type

useJobRun

Options

Return Type

useJobLogs

Options

useRuns

Generic type parameter (dashboard with multiple job types)

With JobDefinition (single job, auto-filters by jobName)

Without type parameter (untyped)

Signatures

Options

Return Type

SPA Hooks ​

DurablyProvider ​

Props ​

useDurably ​

Return Type ​

useJob ​

Options ​

Return Type ​

useJobRun ​

Options ​

Return Type ​

useJobLogs ​

Options ​

useRuns ​

Generic type parameter (dashboard with multiple job types) ​

With JobDefinition (single job, auto-filters by jobName) ​

Without type parameter (untyped) ​

Signatures ​

Options ​

Return Type ​

SPA Hooks

DurablyProvider

Props

useDurably

Return Type

useJob

Options

Return Type

useJobRun

Options

Return Type

useJobLogs

Options

useRuns

Generic type parameter (dashboard with multiple job types)

With JobDefinition (single job, auto-filters by jobName)

Without type parameter (untyped)

Signatures

Options

Return Type