refactor: Upgrade to TypeScript 6.0.2 (#27673)

jest.config.js

@@ -9,6 +9,7 @@ const tsJestOptions = {
 		...compilerOptions,
 		declaration: false,
 		sourceMap: true,
+		rootDir: '.',
 	},
 };
 

packages/@n8n/codemirror-lang-sql/tsconfig.json

@@ -2,7 +2,8 @@
 	"extends": "@n8n/typescript-config/tsconfig.common.json",
 	"compilerOptions": {
 		"rootDir": ".",
-		"tsBuildInfoFile": "dist/typecheck.tsbuildinfo"
+		"tsBuildInfoFile": "dist/typecheck.tsbuildinfo",
+		"types": ["node", "jest"]
 	},
 	"include": ["src/**/*.ts", "test/**/*.ts"]
 }

packages/@n8n/codemirror-lang/tsconfig.json

@@ -2,7 +2,8 @@
 	"extends": "@n8n/typescript-config/tsconfig.common.json",
 	"compilerOptions": {
 		"rootDir": ".",
-		"tsBuildInfoFile": "dist/typecheck.tsbuildinfo"
+		"tsBuildInfoFile": "dist/typecheck.tsbuildinfo",
+		"types": ["node", "jest"]
 	},
 	"include": ["src/**/*.ts", "test/**/*.ts"]
 }

packages/@n8n/crdt/src/transports/websocket.ts

@@ -85,7 +85,8 @@ export class WebSocketTransport implements SyncTransport {
 			throw new Error('Transport not connected');
 		}
 
-		this.ws.send(data);
+		// TODO: narrow SyncTransport.send to Uint8Array<ArrayBuffer> and propagate through Y.js call sites
+		this.ws.send(data as unknown as Uint8Array<ArrayBuffer>);
 	}
 
 	onReceive(handler: ReceiveHandler): Unsubscribe {

packages/@n8n/extension-sdk/tsconfig.json

@@ -8,6 +8,9 @@
 		},
 		{
 			"path": "./tsconfig.frontend.json"
+		},
+		{
+			"path": "./tsconfig.scripts.json"
 		}
 	]
 }

packages/@n8n/extension-sdk/tsconfig.scripts.json

@@ -0,0 +1,7 @@
+{
+	"extends": "@n8n/typescript-config/tsconfig.backend.json",
+	"compilerOptions": {
+		"noEmit": true
+	},
+	"include": ["scripts/**/*.ts"]
+}

packages/@n8n/json-schema-to-zod/tsconfig.cjs.json

@@ -2,6 +2,7 @@
 	"compilerOptions": {
 		"target": "es2020",
 		"module": "commonjs",
+		"rootDir": "src",
 		"outDir": "dist/cjs",
 		"strict": true,
 		"skipLibCheck": true,

packages/@n8n/json-schema-to-zod/tsconfig.esm.json

@@ -1,8 +1,10 @@
 {
 	"compilerOptions": {
+		"ignoreDeprecations": "6.0",
 		"target": "es2020",
 		"module": "es2020",
 		"moduleResolution": "node",
+		"rootDir": "src",
 		"outDir": "dist/esm",
 		"strict": true,
 		"skipLibCheck": true,

packages/@n8n/json-schema-to-zod/tsconfig.json

@@ -1,5 +1,5 @@
 {
-	"extends": ["@n8n/typescript-config/tsconfig.common.json"],
+	"extends": ["@n8n/typescript-config/tsconfig.backend.json"],
 	"compilerOptions": {
 		"rootDir": ".",
 		"baseUrl": "src",

packages/@n8n/json-schema-to-zod/tsconfig.types.json

@@ -2,6 +2,7 @@
 	"compilerOptions": {
 		"declaration": true,
 		"emitDeclarationOnly": true,
+		"rootDir": "src",
 		"outDir": "dist/types",
 		"strict": true,
 		"skipLibCheck": true,

packages/@n8n/stylelint-config/tsconfig.json

@@ -1,5 +1,6 @@
 {
 	"compilerOptions": {
+		"ignoreDeprecations": "6.0",
 		"target": "ES2015",
 		"module": "ESNext",
 		"moduleResolution": "node",
@@ -11,7 +12,8 @@
 		"declaration": true,
 		"declarationMap": true,
 		"downlevelIteration": true,
-		"skipLibCheck": true
+		"skipLibCheck": true,
+		"types": ["node", "jest"]
 	},
 	"include": ["src/**/*"],
 	"exclude": ["dist", "node_modules", "**/*.test.ts"]

packages/@n8n/typescript-config/modern/tsconfig.cjs.json

@@ -1,5 +1,6 @@
 {
 	"compilerOptions": {
+		"ignoreDeprecations": "6.0",
 		"composite": true,
 		"module": "umd",
 		"moduleResolution": "node",

packages/@n8n/typescript-config/modern/tsconfig.json

@@ -1,5 +1,7 @@
 {
 	"compilerOptions": {
+		"ignoreDeprecations": "6.0",
+		"noUncheckedSideEffectImports": false,
 		"esModuleInterop": true,
 		"skipLibCheck": true,
 		"target": "es2022",

packages/@n8n/typescript-config/tsconfig.common.json

@@ -1,5 +1,7 @@
 {
 	"compilerOptions": {
+		"ignoreDeprecations": "6.0",
+		"noUncheckedSideEffectImports": false,
 		"strict": true,
 		"module": "commonjs",
 		"moduleResolution": "node",

packages/cli/src/modules/log-streaming.ee/log-streaming.controller.ts

@@ -87,7 +87,9 @@ export class EventBusController {
 				);
 				break;
 			default:
-				throw new BadRequestError(`Unknown destination type: ${body.__type}`);
+				throw new BadRequestError(
+					`Unknown destination type: ${(body as { __type: string }).__type}`,
+				);
 		}
 
 		return result.serialize();

packages/frontend/@n8n/design-system/tsconfig.json

@@ -3,7 +3,7 @@
 	"compilerOptions": {
 		"baseUrl": ".",
 		"rootDirs": [".", "../composables/src"],
-		"outDir": "dist",
+		"noEmit": true,
 		"moduleResolution": "bundler",
 		"types": ["vite/client", "unplugin-icons/types/vue", "vitest/globals"],
 		"typeRoots": [

packages/frontend/@n8n/rest-api-client/tsconfig.json

@@ -2,7 +2,7 @@
 	"extends": "@n8n/typescript-config/tsconfig.frontend.json",
 	"compilerOptions": {
 		"baseUrl": ".",
-		"outDir": "dist",
+		"noEmit": true,
 		"useUnknownInCatchVariables": false,
 		"types": ["vite/client", "vitest/globals"],
 		"isolatedModules": true,

packages/frontend/@n8n/storybook/tsconfig.app.json

@@ -4,7 +4,7 @@
 		"tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
 		"baseUrl": ".",
 		"rootDirs": [".", "../composables/src"],
-		"outDir": "dist",
+		"noEmit": true,
 		"moduleResolution": "bundler",
 
 		"types": [

packages/frontend/editor-ui/src/__tests__/setup.ts

@@ -108,6 +108,7 @@ class JsonDomPointerEvent extends MouseEvent implements PointerEvent {
 	readonly altitudeAngle: number;
 
 	readonly azimuthAngle: number;
+	readonly persistentDeviceId: number;
 
 	constructor(type: string, params: PointerEventInit = {}) {
 		super(type, params);
@@ -123,6 +124,7 @@ class JsonDomPointerEvent extends MouseEvent implements PointerEvent {
 		this.altitudeAngle = params.altitudeAngle ?? Math.PI / 2;
 		this.azimuthAngle = params.azimuthAngle ?? 0;
 		this.isPrimary = params.isPrimary ?? true;
+		this.persistentDeviceId = 0;
 	}
 
 	getCoalescedEvents(): PointerEvent[] {
@@ -219,6 +221,8 @@ export class IntersectionObserver {
 
 	rootMargin = '';
 
+	scrollMargin = '';
+
 	thresholds = [];
 
 	disconnect() {

packages/frontend/editor-ui/src/features/shared/editors/plugins/codemirror/typescript/worker/constants.ts

@@ -14,6 +14,8 @@ export const COMPILER_OPTIONS: ts.CompilerOptions = {
 	skipDefaultLibCheck: true,
 	noEmit: true,
 	noImplicitAny: false,
+	// Suppress TS 6.0 deprecation diagnostic for moduleResolution=node10 set by @typescript/vfs
+	ignoreDeprecations: '6.0',
 };
 export const TYPESCRIPT_AUTOCOMPLETE_THRESHOLD = '15';
 export const TYPESCRIPT_FILES = {

packages/frontend/editor-ui/tsconfig.json

@@ -10,7 +10,7 @@
 			"../@n8n/chat/src",
 			"../@n8n/design-system/src"
 		],
-		"outDir": "dist",
+		"noEmit": true,
 		"types": [
 			"vitest/globals",
 			"unplugin-icons/types/vue",

packages/nodes-base/tsconfig.build.cjs.json

@@ -16,7 +16,9 @@
 	"exclude": [
 		"node_modules",
 		"nodes/**/*.test.ts",
+		"nodes/**/test/**",
 		"credentials/**/*.test.ts",
+		"credentials/**/test/**",
 		"utils/**/*.test.ts",
 		"test/**",
 		"../core/nodes-testing"

packages/testing/rules-engine/tsconfig.json

@@ -7,6 +7,7 @@
 		"declarationMap": true,
 		"sourceMap": true,
 		"lib": ["ES2022"],
+		"types": ["node"],
 		"module": "NodeNext",
 		"moduleResolution": "NodeNext",
 		"target": "ES2022",

pnpm-workspace.yaml

@@ -75,7 +75,7 @@ catalog:
   ts-morph: ^27.0.2
   tsdown: ^0.16.5
   tsx: ^4.19.3
-  typescript: 5.9.2
+  typescript: 6.0.2
   uuid: 10.0.0
   vite: npm:rolldown-vite@latest
   vite-plugin-dts: ^4.5.4