Typescript 6, eslint -> oxlint / oxfmt

.github/workflows/npm-publish.yml

@@ -10,17 +10,30 @@ on:
 
 jobs:
   build:
+    name: Test
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
       - uses: actions/setup-node@v6
         with:
           node-version: 18
       - run: npm ci
-      - run: npm test
+      - run: make unit-test
+
+  lint:
+    name: Lint & format
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 26
+      - run: npm ci
+      - run: make lint
 
   publish-npm:
-    needs: build
+    name: Publish to npm
+    needs: [build, lint]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7

.github/workflows/test.yml

@@ -11,6 +11,7 @@ on:
 
 jobs:
   build:
+    name: Test (Node.js ${{ matrix.node-version }})
 
     runs-on: ubuntu-latest
 
@@ -27,4 +28,19 @@ jobs:
         node-version: ${{ matrix.node-version }}
     - run: npm ci
     - run: npm run build --if-present
-    - run: npm test
+    - run: make unit-test
+
+  lint:
+    name: Lint & format
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v7
+    - name: Use Node.js 26.x
+      uses: actions/setup-node@v6
+      with:
+        node-version: 26.x
+    - run: npm ci
+    - name: Lint and check formatting
+      run: make lint

.oxfmtrc.json

@@ -0,0 +1,11 @@
+{
+  "$schema": "./node_modules/oxfmt/configuration_schema.json",
+  "printWidth": 100,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "all",
+  "endOfLine": "lf",
+  "insertFinalNewline": true
+}

.oxlintrc.json

@@ -0,0 +1,32 @@
+{
+  "$schema": "./node_modules/oxlint/configuration_schema.json",
+  "plugins": ["typescript", "oxc"],
+  "categories": {
+    "correctness": "error"
+  },
+  "env": {
+    "browser": true,
+    "node": true,
+    "es2020": true
+  },
+  "rules": {
+    "no-console": ["error", { "allow": ["warn", "error", "info", "debug"] }],
+    "no-constant-condition": ["error", { "checkLoops": false }],
+    "no-unused-vars": ["error", { "ignoreRestSiblings": true, "args": "none" }],
+
+    "typescript/ban-ts-comment": ["error", {
+      "ts-expect-error": "allow-with-description",
+      "ts-nocheck": "allow-with-description"
+    }],
+    "typescript/ban-tslint-comment": "error",
+    "typescript/consistent-type-assertions": ["error", {
+      "assertionStyle": "as",
+      "objectLiteralTypeAssertions": "never"
+    }],
+    "typescript/no-invalid-void-type": "error",
+    "typescript/no-namespace": "error",
+    "typescript/no-non-null-asserted-optional-chain": "error",
+    "typescript/prefer-for-of": "error",
+    "typescript/prefer-ts-expect-error": "error"
+  }
+}

Makefile

@@ -8,7 +8,10 @@ clean:
 	rm -rf dist/ cjs/ test/httpwg-tests
 
 .PHONY: test
-test: lint test/httpwg-tests/list.json dist/build
+test: lint unit-test
+
+.PHONY: unit-test
+unit-test: test/httpwg-tests/list.json dist/build
 	node --test
 
 .PHONY: test-debug
@@ -17,11 +20,13 @@ test-debug:
 
 .PHONY: lint
 lint:
-	node_modules/.bin/eslint --quiet 'src/**/*.ts'
+	node_modules/.bin/oxlint src
+	node_modules/.bin/oxfmt --check src
 
 .PHONY: fix
 fix:
-	node_modules/.bin/eslint --quiet 'src/**/*.ts' --fix
+	node_modules/.bin/oxlint --fix src
+	node_modules/.bin/oxfmt src
 
 .PHONY: watch
 watch:

changelog.md

@@ -9,6 +9,8 @@ ChangeLog
   (@gyanu2507)
 * Fix: serialization of displaystring that encodes to byte values under 0xf,
   they were missing the 0 padding of %0?.
+* Upgrade to Typescript 6.
+* Switch from ESLint to oxfmt/oxlint.
 
 
 2.1.0 (2026-09-11)