Upgrade typescript 6.0 (#10285)

timotheeguerin · web-flow · commit c33906583552 · 2026-04-10T00:25:56.000Z
diff --git a/.chronus/changes/upgrade-deps-typescript-6.0-2026-3-7-16-27-29.md b/.chronus/changes/upgrade-deps-typescript-6.0-2026-3-7-16-27-29.md
@@ -0,0 +1,11 @@
+---
+# Change versionKind to one of: internal, fix, dependencies, feature, deprecation, breaking
+changeKind: internal
+packages:
+  - "@typespec/html-program-viewer"
+  - "@typespec/http-server-js"
+  - "@typespec/playground"
+  - "@typespec/spec-api"
+---
+
+Upgrade typescript 6.0
diff --git a/packages/html-program-viewer/tsconfig.build.json b/packages/html-program-viewer/tsconfig.build.json
@@ -1,5 +1,8 @@
 {
   "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "src"
+  },
   "include": ["src"],
   "exclude": ["src/index.ts", "src/emitter.ts", "**/*.test.ts", "**/*.test.tsx"],
   "references": [{ "path": "../compiler/tsconfig.build.json" }]
diff --git a/packages/http-server-js/generated-defs/package.json.ts b/packages/http-server-js/generated-defs/package.json.ts
@@ -29,7 +29,7 @@ export const hsjsDependencies: Record<string, string> = {
   "swagger-ui-express": "^5.0.1",
   "temporal-polyfill": "^0.3.2",
   "tsx": "^4.21.0",
-  "typescript": "~5.9.3",
+  "typescript": "~6.0.2",
   "vitest": "^4.1.0",
   "yargs": "~18.0.0",
   "prettier": "~3.8.1",
diff --git a/packages/playground/definitions/index.d.ts b/packages/playground/definitions/index.d.ts
@@ -1 +1,2 @@
 declare module "*.module.css";
+declare module "*.css";
diff --git a/packages/react-components/tsconfig.json b/packages/react-components/tsconfig.json
@@ -1,6 +1,7 @@
 {
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
+    "rootDir": "src",
     "incremental": false,
     "composite": false,
     "module": "NodeNext",
diff --git a/packages/spec-api/tsconfig.json b/packages/spec-api/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
-    "baseUrl": ".",
+    "rootDir": ".",
     "outDir": "dist",
     "tsBuildInfoFile": "temp/.tsbuildinfo",
     "types": ["multer"]
diff --git a/packages/spec-dashboard/tsconfig.json b/packages/spec-dashboard/tsconfig.json
@@ -1,6 +1,7 @@
 {
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
+    "rootDir": "src",
     "incremental": false,
     "composite": false,
     "skipLibCheck": true,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
diff --git a/website/src/env.d.ts b/website/src/env.d.ts

Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,8 @@`
`1`	`1`	`{`
`2`	`2`	`"extends": "./tsconfig.json",`
	`3`	`+ "compilerOptions": {`
	`4`	`+ "rootDir": "src"`
	`5`	`+ },`
`3`	`6`	`"include": ["src"],`
`4`	`7`	`"exclude": ["src/index.ts", "src/emitter.ts", "*/.test.ts", "*/.test.tsx"],`
`5`	`8`	`"references": [{ "path": "../compiler/tsconfig.build.json" }]`
Original file line number	Diff line number	Diff line change
`@@ -1 +1,2 @@`
`1`	`1`	`declare module "*.module.css";`
	`2`	`+declare module "*.css";`
Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,7 @@`
`1`	`1`	`{`
`2`	`2`	`"extends": "../../tsconfig.base.json",`
`3`	`3`	`"compilerOptions": {`
	`4`	`+ "rootDir": "src",`
`4`	`5`	`"incremental": false,`
`5`	`6`	`"composite": false,`
`6`	`7`	`"module": "NodeNext",`
Original file line number	Diff line number	Diff line change
`@@ -1,7 +1,7 @@`
`1`	`1`	`{`
`2`	`2`	`"extends": "../../tsconfig.base.json",`
`3`	`3`	`"compilerOptions": {`
`4`		`- "baseUrl": ".",`
	`4`	`+ "rootDir": ".",`
`5`	`5`	`"outDir": "dist",`
`6`	`6`	`"tsBuildInfoFile": "temp/.tsbuildinfo",`
`7`	`7`	`"types": ["multer"]`