Install typescript-eslint in preparation for more TypeScript

Author: bhousel

bun.lock

@@ -1,4 +1,6 @@
+import globals from 'globals';
 import js from '@eslint/js';
+import ts from 'typescript-eslint';
 
 const rules = {
   rules: {
@@ -16,10 +18,10 @@ const rules = {
     "eqeqeq": ["error", "smart"],
     "func-call-spacing": ["warn", "never"],
     "grouped-accessor-pairs": "error",
-    "indent": ["off", 4],
+    "indent": ["off", 2],
     "keyword-spacing": "error",
     "linebreak-style": ["error", "unix"],
-    "no-await-in-loop": "error",
+    "no-await-in-loop": "off",
     "no-caller": "error",
     "no-catch-shadow": "error",
     "no-console": "warn",
@@ -34,14 +36,15 @@ const rules = {
     "no-floating-decimal": "error",
     "no-global-assign": "error",
     "no-implied-eval": "error",
-    "no-invalid-this": "off",
+    "no-invalid-this": "error",
     "no-iterator": "error",
     "no-labels": "error",
     "no-label-var": "error",
     "no-lone-blocks": "error",
     "no-loop-func": "error",
     "no-loss-of-precision": "error",
     "no-multi-str": "error",
+    "no-native-reassign": "error",
     "no-new": "error",
     "no-new-func": "error",
     "no-new-wrappers": "error",
@@ -70,7 +73,7 @@ const rules = {
     "no-unreachable": "warn",
     "no-unreachable-loop": "warn",
     "no-unused-expressions": "error",
-    "no-unused-vars": ["warn", { "vars": "all", "args": "none", "caughtErrors": "none" }],
+    "no-unused-vars": "off", // typescript-eslint will check it
     "no-use-before-define": ["off", "nofunc"],
     "no-useless-backreference": "warn",
     "no-useless-call": "warn",
@@ -83,19 +86,44 @@ const rules = {
     "no-warning-comments": "warn",
     "no-whitespace-before-property": "warn",
     "no-with": "error",
-    "quotes": ["error", "single", { "allowTemplateLiterals": true }],
     "radix": ["error", "always"],
     "require-atomic-updates": "error",
     "require-await": "error",
     "semi": ["error", "always"],
     "semi-spacing": "error",
     "space-unary-ops": "error",
-    "wrap-regex": "off"
+    "wrap-regex": "off",
+
+    "@typescript-eslint/array-type": "off",
+    "@typescript-eslint/no-empty-function": "off",
+    "@typescript-eslint/no-explicit-any": "warn",
+    "@typescript-eslint/no-inferrable-types": ["warn", { "ignoreParameters": true }],
+    "@typescript-eslint/no-unused-vars": ["warn", { "vars": "all", "args": "none", "caughtErrors": "none", "destructuredArrayIgnorePattern": "^_" }]
   }
 };
 
 export default [
   js.configs.recommended,
-  rules
+  ...ts.configs.recommended,
+  ...ts.configs.stylistic,
+  rules,
+  {
+    files: [ '**/*.{js,ts}' ],
+    languageOptions: {
+      globals: {
+        ...globals.browser
+      }
+    }
+  },
+  {
+    files: [ 'scripts/*', 'test/*' ],
+    languageOptions: {
+      globals: {
+        Bun: false
+      }
+    },
+    rules: {
+      "no-console": "off"
+    }
+  }
 ];
-

eslint.config.js

@@ -31,15 +31,20 @@
   "scripts": {
     "all": "run-s clean lint build:js test",
     "clean": "bun ./scripts/clean.ts",
+    "build": "run-p build:js build:ts",
     "build:js": "bun ./scripts/build_js.ts",
-    "test": "bun test --dots --coverage ./test/*.js",
-    "lint": "eslint ./src/diff3.mjs ./test/*.js"
+    "build:ts": "tsc",
+    "lint": "eslint ./scripts ./src ./test",
+    "test": "bun test --dots --coverage ./test"
   },
   "devDependencies": {
     "@eslint/js": "^9.38.0",
     "@types/bun": "^1.3.1",
     "eslint": "^9.38.0",
-    "npm-run-all2": "^8.0.4"
+    "globals": "^16.4.0",
+    "npm-run-all2": "^8.0.4",
+    "typescript-eslint": "^8.46.2",
+    "typescript": "^5.9.3"
   },
   "sideEffects": false,
   "publishConfig": {