actions/socket.svelte.ts

Epoch ms of the most recent successful open. Never cleared on close.

Epoch ms of the most recent close event or client-initiated close.

Close code from the most recent close. Initial null means "never closed."

Reason string from the most recent close event (may be empty).

The error thrown by the most recent attempted send(), or null if the most recent attempt succeeded or none has been attempted yet. Populated when the underlying ws.send throws (e.g., buffer full, serialization error); reset to null on the next successful send. Not touched when send() short-circuits because the socket is not connected — consult connected for that case. Wrappers surfacing per-message failure reasons can read this after a false return from send().

Swap the auto-reconnect policy in place. Accepts the same shape as the constructor's reconnect option: false disables reconnect, true or null/omitted restores the defaults, or a config object customizes specific fields (missing fields fall back to defaults, not "keep current" — each call defines the whole policy atomically, same as the constructor).

In-flight reconnect schedules are monotonically shortened: the effective total wait from arm-time never exceeds what the new policy prescribes. If the new target is already past the time already elapsed, the reconnect fires immediately (on the next tick). The wait is never extended.

Turning reconnect off while a reconnect timer is pending cancels that timer and transitions status to closed (since the lie of 'reconnecting' would be visible to UI indicators). Turning it back on does not synthesize a reconnect — wait for the next close.

Swap the heartbeat policy in place. Accepts the same shape as the constructor's heartbeat option: false disables the timer, true or null/omitted restores the defaults, or a config object customizes specific fields (missing fields fall back to defaults, not "keep current" — each call defines the whole policy atomically, same as the constructor and set_reconnect).

When connected, the live timer is restarted immediately so the new interval / receive_timeout take effect without a reconnect; when disconnected, just stashes the policy for the next open.

Cancel a scheduled reconnect without closing the client or disabling auto-reconnect. Transitions status from reconnecting → closed and resets the backoff counters — the next close still triggers a fresh reconnect cycle under the current policy. No-op when no reconnect is pending.

Use this when UI state asks "stop trying for now" without the finality of disconnect (which also rejects pending/queued requests and clears heartbeat) or the policy change of set_reconnect(false) (which disables future reconnects). The queue stays intact so that calling connect later flushes buffered work.

Open the WebSocket. No-op on SSR, or if the session has been revoked. Cancels any pending reconnect and tears down any existing connection first; an open prior socket is closed with a normal-closure code.

Close the WebSocket, cancel any pending reconnect, and reset the reconnect backoff counters. Puts the client in closed status; call connect() to reopen. Safe to call more than once.

Explicit-resource-management hook — supports using client = new FrontendWebsocketClient(url).

Promise-based JSON-RPC over the socket. Auto-assigns a monotonic request id (or uses an explicit one supplied via options.id — used by FrontendWebsocketTransport which delegates to this method and has its own peer-minted UUID), tracks the pending promise, and resolves when the server sends a matching response.

Callers supplying an explicit options.id are responsible for uniqueness — the pending map is keyed by id, and a duplicate silently overwrites the prior entry. Auto-minted ids are monotonic and never collide with themselves or with peer-minted UUIDs (the types differ: integer vs string).

While the socket is disconnected, the request is buffered in a bounded queue (default-on, DEFAULT_QUEUE_MAX_SIZE) and flushed on reopen. Pass {queue: false} to reject immediately when disconnected — used internally by the heartbeat, which must not fight the queue for the disconnect-detection slot.

On AbortSignal fire: rejects the local promise *and* sends the shared cancel notification (cancel_action_spec.method) so the server-side dispatcher can abort the matching handler's ctx.signal. Suppressed for queued-but-never-sent (server doesn't know about it) and response-beat-cancel races.

• ThrownJsonrpcError - on the returned promise — never thrown

Auto-reconnect policy. false disables reconnect entirely; true or omit for default timing; pass an object to customize.

Activity-aware heartbeat. true/null/omit for defaults; false disables the timer entirely (only do this if the server side is also running without heartbeat); pass an object to tune interval / receive_timeout.

Durable queue for FrontendWebsocketClient.request. true or omit for defaults; false disables buffering (requests while disconnected reject immediately). Raw FrontendWebsocketClient.send is never queued — use request() for RPC semantics.

Optional logger for diagnostic messages.

Idle duration (ms) after which a heartbeat is sent. Reset by any send or receive — chatty clients never emit extras. Defaults to DEFAULT_HEARTBEAT_INTERVAL.

Receive-silence (ms) after which the client closes the socket with WS_CLOSE_CLIENT_HEARTBEAT_TIMEOUT, letting auto-reconnect kick in. Should be a comfortable multiple of interval. Defaults to DEFAULT_HEARTBEAT_RECEIVE_TIMEOUT.

Maximum number of requests held while the socket is disconnected. Enqueue past this rejects the new call with a queue_overflow error. Defaults to DEFAULT_QUEUE_MAX_SIZE.

Base reconnect delay in ms. Defaults to 1000.

Max reconnect delay in ms (cap on exponential backoff). Defaults to 10000.

Exponential backoff factor. Defaults to 1.5.

whether the session has been permanently revoked (typically FrontendWebsocketClient.revoked)