mswjs/msw `562fac96..773a6d28`

base and head as given

WebSocket mocking entered the core API through a new ws namespace.
WebSocket client management entered the system as a new component.
Browser worker setup now depends on WebSocket interception.
Node server setup now depends on WebSocket interception.

files changed: 63
in a component: 27
lines in components: 1,323
components: 10
public routes changed: 0
schema statements: 0
new dependencies: 3
excluded by role: 36

Based on 12 of 27 eligible changed files

WebSocket mocking

Added

Before: WebSocket handler API did not exist
After: Handlers mock matching socket links

Applications can define URL-matched WebSocket links, receive connection events, send messages, and broadcast to connected clients. Browser and server setups enable interception, while browser runtimes share active clients for cross-runtime broadcasts.

In favour

In favour: Reuses URL matching for HTTP and WebSocket handlers
In favour: Shares clients across browser runtimes for link-wide broadcasts

The model found nothing to weigh against this.

Inspect 12 source files behind this explanation

Files changed in 10 components (6 shown). Dependencies shown: 4 new, 11 unchanged

unchanged · 11new · 41 component added

4 new dependencies between components — Setup Worker → WebSocket Support · WebSocket Support → Handlers · Node → WebSocket Support · Core → WebSocket Support

What else could behave differently

13 components · 43 files

These components import changed code, directly or through other files. A traced dependency is a place to review, not a confirmed runtime failure.

Reached 3

Component	Symbol	Cited at	Files	Reached by
WebSocket Supportsrc/core/ws/	Added `kDispatchEvent`1 of 11 changed symbols reaching it	src/core/handlers/WebSocketHandler.ts:25	6	6 direct Trace path Shortest component path from the changed symbol: Handlers WebSocket Support Later steps follow file imports; they do not prove this symbol is called.
Coresrc/core/	Added `WebSocketHandlerEventMap`1 of 16 changed symbols reaching it	src/core/handlers/WebSocketHandler.ts:16-18	6	4 direct · 2 at two steps Trace path Shortest component path from the changed symbol: Handlers Core Later steps follow file imports; they do not prove this symbol is called.
src/core/utils/internal/	Signature changed `getTimestamp`	src/core/utils/logging/getTimestamp.ts:8-17	1	none direct · 1 at two steps Trace path Shortest component path from the changed symbol: Logging Utilities Handlers src/core/utils/internal/ Later steps follow file imports; they do not prove this symbol is called.

Ranked lower 10

Component	Files	Reached by
src/core/handlers/	2	2 direct
src/core/utils/	1	1 direct
src/browser/setupWorker/	2	2 direct
src/node/	5	5 direct
src/browser/	1	1 direct
src/browser/utils/	3	1 direct · 2 at two steps
src/native/	1	1 direct
src/iife/	1	none direct · 1 at two steps
src/browser/setupWorker/start/	12	7 direct · 5 at two steps
src/browser/setupWorker/stop/	2	2 direct

Statements 3

Adding kDispatchEvent reached 6 WebSocket support files. 6

WebSocketHandler.ts:25

Adding WebSocketHandlerEventMap reached 6 Core files. 42

WebSocketHandler.ts:16-18

The getTimestamp signature change reached 1 internal utility file. 1

getTimestamp.ts:8-17

27 reached files belong to no component — tests, docs and config.

Routes, schema, dependencies

What	Object	Where
+ dependency	@fastify/websocket@^8.3.1	declared, and used by no file in any component
+ dependency	@open-draft/deferred-promise@^2.2.0	src/core/ws/WebSocketIndexedDBClientStore.ts:1
+ dependency	fastify@^4.26.0	declared, and used by no file in any component

3 statements, with the lines behind them

Declared, and used by no file in any component.

@open-draft/deferred-promise ^2.2.0 was added as a dependency.

WebSocketIndexedDBClientStore.ts:1

Declared, and used by no file in any component.

Inspect components, files and symbols

Component

WebSocket SupportAdded

src/core/ws/

10 files · 786 lines

dependency, 3 dependents

WebSocket support exported SerializedWebSocketClient, WebSocketBroadcastChannelMessage, WebSocketClientManager, WebSocketClientStore, WebSocketIndexedDBClientStore, WebSocketMemoryClientStore, WebSocketRemoteClientConnection, attachWebSocketLogger, getMessageLength, getPublicData, handleWebSocketEvent, logConnectionOpen, truncateMessage, and webSocketInterceptor.

CoreModified

src/core/

3 files · 226 lines

7 dependents

Core exported WebSocketData, WebSocketEventListener, WebSocketHandler, WebSocketHandlerConnection, WebSocketHandlerEventMap, WebSocketLink, and ws.

HandlersModified

src/core/handlers/

1 file · 142 lines

8 dependents

Handlers exported WebSocketHandler, WebSocketHandlerConnection, WebSocketHandlerEventMap, kDispatchEvent, kEmitter, and kSender.

Core UtilitiesModified

src/core/utils/

2 files · 10 lines

5 dependents

Setup WorkerModified

src/browser/setupWorker/

2 files · 55 lines

4 dependents

NodeModified

src/node/

4 files · 64 lines

1 dependent

Matching UtilitiesModified

src/core/utils/matching/

1 file · 4 lines

3 dependents

ranked lower · 0.13

Matching utilities exported isPath.

Logging UtilitiesModified

src/core/utils/logging/

1 file · 17 lines

2 dependents

ranked lower · 0.11

Worker StartModified

src/browser/setupWorker/start/

2 files · 13 lines

1 dependent

ranked lower · 0.08

Worker StopModified

src/browser/setupWorker/stop/

1 file · 6 lines

1 dependent

ranked lower · 0.08

File

WebSocket Supportsrc/core/ws/

utils/attachWebSocketLogger.ts

+259 −0

WebSocket Supportsrc/core/ws/

WebSocketClientManager.ts

+211 −0

WebSocket Supportsrc/core/ws/

WebSocketIndexedDBClientStore.ts

+145 −0

WebSocket Supportsrc/core/ws/

handleWebSocketEvent.ts

+82 −0

WebSocket Supportsrc/core/ws/

WebSocketMemoryClientStore.ts

+27 −0

WebSocket Supportsrc/core/ws/

utils/getMessageLength.ts

+19 −0

WebSocket Supportsrc/core/ws/

utils/getPublicData.ts

+17 −0

WebSocket Supportsrc/core/ws/

WebSocketClientStore.ts

+14 −0

WebSocket Supportsrc/core/ws/

utils/truncateMessage.ts

+9 −0

WebSocket Supportsrc/core/ws/

webSocketInterceptor.ts

+3 −0

Coresrc/core/

ws.ts

+166 −0

Coresrc/core/

SetupApi.ts

+28 −20

Coresrc/core/

index.ts

+11 −1

Handlerssrc/core/handlers/

WebSocketHandler.ts

+142 −0

Core Utilitiessrc/core/utils/

executeHandlers.ts

+6 −2

Core Utilitiessrc/core/utils/

handleRequest.ts

+1 −1

Setup Workersrc/browser/setupWorker/

setupWorker.ts

+32 −3

Setup Workersrc/browser/setupWorker/

glossary.ts

+10 −10

Nodesrc/node/

SetupServerCommonApi.ts

+29 −5

Nodesrc/node/

SetupServerApi.ts

+8 −7

Nodesrc/node/

glossary.ts

+5 −7

Nodesrc/node/

setupServer.ts

+2 −1

Matching Utilitiessrc/core/utils/matching/

matchRequestUrl.ts

+4 −0

Logging Utilitiessrc/core/utils/logging/

getTimestamp.ts

+11 −6

Worker Startsrc/browser/setupWorker/start/

createRequestListener.ts

+7 −1

Worker Startsrc/browser/setupWorker/start/

createStartHandler.ts

+5 −0

Worker Stopsrc/browser/setupWorker/stop/

createStop.ts

+6 −0

Function

imports what changeddownstream of it, one mark per step

SetupWorker()glossary.ts

reaches 2 components

The SetupWorker signature change reached 1 browser file. 1

glossary.ts:196-250

The SetupWorker signature change reached 1 IIFE file. 1

glossary.ts:196-250

SetupWorkerInternalContext()glossary.ts

reaches 4 components

The SetupWorkerInternalContext signature change reached 2 setup-worker files. 2

glossary.ts:88-143

The SetupWorkerInternalContext signature change reached 3 browser utility files. 12

glossary.ts:88-143

The SetupWorkerInternalContext signature change reached 12 worker-start files. 75

glossary.ts:88-143

The SetupWorkerInternalContext signature change reached 2 worker-stop files. 2

glossary.ts:88-143

WebSocketHandler()WebSocketHandler.ts

reaches Node

Adding WebSocketHandler reached 5 Node files. 5

WebSocketHandler.ts:30-103

executeHandlers()executeHandlers.ts

reaches Core Utilities

The executeHandlers signature change reached 1 core utility file. 1

executeHandlers.ts:21-67

getTimestamp()getTimestamp.ts

reaches Handlers

The getTimestamp signature change reached 2 handler files. 2

getTimestamp.ts:8-17

SetupServerCommonApi()SetupServerCommonApi.ts

reaches src/native/

The SetupServerCommonApi signature change reached 1 native file. 1

SetupServerCommonApi.ts:30-149

Diff

WebSocket Supportsrc/core/ws/

utils/attachWebSocketLogger.ts

1–259

WebSocket Supportsrc/core/ws/

WebSocketClientManager.ts

1–211

WebSocket Supportsrc/core/ws/

WebSocketIndexedDBClientStore.ts

1–145

WebSocket Supportsrc/core/ws/

handleWebSocketEvent.ts

1–82

WebSocket Supportsrc/core/ws/

WebSocketMemoryClientStore.ts

1–27

WebSocket Supportsrc/core/ws/

utils/getMessageLength.ts

1–19

WebSocket Supportsrc/core/ws/

utils/getPublicData.ts

1–17

WebSocket Supportsrc/core/ws/

WebSocketClientStore.ts

1–14

WebSocket Supportsrc/core/ws/

utils/truncateMessage.ts

1–9

WebSocket Supportsrc/core/ws/

webSocketInterceptor.ts

1–3

Coresrc/core/

ws.ts

1–166

Coresrc/core/

SetupApi.ts

3–3, 9–9, 12–16 and 11 more spans

Coresrc/core/

index.ts

5–5, 12–19, 56–57

Handlerssrc/core/handlers/

WebSocketHandler.ts

1–142

Core Utilitiessrc/core/utils/

executeHandlers.ts

3–3, 21–21, 36–39

Core Utilitiessrc/core/utils/

handleRequest.ts

3–3, 5–5

Setup Workersrc/browser/setupWorker/

setupWorker.ts

21–22, 25–27, 44–44 and 2 more spans

Setup Workersrc/browser/setupWorker/

glossary.ts

8–8, 10–12, 93–93 and 3 more spans

Nodesrc/node/

SetupServerCommonApi.ts

17–19, 23–24, 42–42 and 4 more spans

Nodesrc/node/

SetupServerApi.ts

7–7, 14–15, 26–26 and 4 more spans

Nodesrc/node/

glossary.ts

2–3, 30–30, 44–44 and 1 more span

Nodesrc/node/

setupServer.ts

2–2, 12–12

Matching Utilitiessrc/core/utils/matching/

matchRequestUrl.ts

74–77

Logging Utilitiessrc/core/utils/logging/

getTimestamp.ts

1–4, 8–8, 10–14 and 1 more span

Worker Startsrc/browser/setupWorker/start/

createRequestListener.ts

12–13, 48–52

Worker Startsrc/browser/setupWorker/start/

createStartHandler.ts

74–78

Worker Stopsrc/browser/setupWorker/stop/

createStop.ts

27–32

Analysis scope

554 → 10

554
files at head
24
components
10
changed by this change
6
shown above of 10

Where the new files landed

12 new files

New file	Belongs to	Used by	Calls	Serves
src/core/ws/10 new filesimports 1 package this change added	WebSocket Supportnew territory	Setup WorkerCoreNode	Handlerssrc/core/utils/internal/Logging Utilitiessrc/core/utils/request/	—
src/core/ws.ts	Corebase frame	—	HandlersMatching UtilitiesWebSocket Support	./core/ws
src/core/handlers/WebSocketHandler.ts	Handlersbase frame	Setup WorkerCoreWebSocket SupportNode	src/core/utils/internal/Matching Utilities	—

28 added files carry no component — 28 test.

10components changed

5reached, not changed

1components added/removed

7dependencies added between components

0dependencies removed between components

0files moved to another path

63 files changed, 30 claims stated. 13 components reached in total.