eslint: Type-check ESLint configuration.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

eslint.config.js

@@ -1,6 +1,9 @@
+// @ts-check
+
 import {FlatCompat} from "@eslint/eslintrc";
 import js from "@eslint/js";
 import confusingBrowserGlobals from "confusing-browser-globals";
+import {defineConfig} from "eslint/config";
 import prettier from "eslint-config-prettier";
 import {configs as astroConfigs} from "eslint-plugin-astro";
 import formatjs from "eslint-plugin-formatjs";
@@ -13,7 +16,7 @@ import tseslint from "typescript-eslint";
 
 const compat = new FlatCompat({baseDirectory: import.meta.dirname});
 
-export default tseslint.config(
+export default defineConfig(
     {
         // This is intended for generated files and vendored third-party files.
         // For our source code, instead of adding files here, consider using
@@ -29,7 +32,8 @@ export default tseslint.config(
     },
     js.configs.recommended,
     importPlugin.flatConfigs.recommended,
-    compat.extends("plugin:no-jquery/recommended", "plugin:no-jquery/deprecated"),
+    compat.config(noJquery.configs.recommended),
+    compat.config(noJquery.configs.deprecated),
     unicorn.configs.recommended,
     prettier,
     tseslint.configs.strictTypeChecked,
@@ -318,7 +322,7 @@ export default tseslint.config(
             "unicorn/prefer-string-replace-all": "off",
         },
     },
-    ...astroConfigs.recommended,
+    astroConfigs.recommended,
     {
         files: ["starlight_help/src/components/ZulipNote.astro"],
         rules: {

package.json

@@ -105,6 +105,7 @@
     "@types/blueimp-md5": "^2.18.0",
     "@types/co-body": "^6.1.3",
     "@types/confusing-browser-globals": "^1.0.3",
+    "@types/eslint-config-prettier": "^6.11.3",
     "@types/gtag.js": "^0.0.20",
     "@types/is-url": "^1.2.32",
     "@types/jquery": "^3.3.31",
@@ -125,6 +126,7 @@
     "@types/winchan": "^0.2.0",
     "@typescript-eslint/eslint-plugin": "^8.2.0",
     "@typescript-eslint/parser": "^8.2.0",
+    "@typescript-eslint/utils": "^8.25.0",
     "astro-eslint-parser": "^1.2.2",
     "babel-plugin-istanbul": "^7.0.0",
     "callsites": "^4.2.0",
@@ -170,6 +172,7 @@
   },
   "pnpm": {
     "overrides": {
+      "@types/eslint": "-",
       "source-map@^0.6": "npm:source-map-js@^1.2.1"
     },
     "patchedDependencies": {

pnpm-lock.yaml

@@ -5,6 +5,7 @@ settings:
   excludeLinksFromLockfile: false
 
 overrides:
+  '@types/eslint': '-'
   source-map@^0.6: npm:source-map-js@^1.2.1
 
 patchedDependencies:
@@ -335,6 +336,9 @@ importers:
       '@types/confusing-browser-globals':
         specifier: ^1.0.3
         version: 1.0.3
+      '@types/eslint-config-prettier':
+        specifier: ^6.11.3
+        version: 6.11.3
       '@types/gtag.js':
         specifier: ^0.0.20
         version: 0.0.20
@@ -395,6 +399,9 @@ importers:
       '@typescript-eslint/parser':
         specifier: ^8.2.0
         version: 8.42.0(eslint@9.34.0(jiti@2.5.1))(typescript@5.9.2)
+      '@typescript-eslint/utils':
+        specifier: ^8.25.0
+        version: 8.42.0(eslint@9.34.0(jiti@2.5.1))(typescript@5.9.2)
       astro-eslint-parser:
         specifier: ^1.2.2
         version: 1.2.2
@@ -2705,12 +2712,12 @@ packages:
   '@types/debug@4.1.12':
     resolution: {integrity: sha512-vIChWdVG3LG1SMxEvI/AK+FWJthlrqlTu7fbrlywTkkaONwk/UAGaULXRlf8vkzFBLVm0zkMdCquhL5aOjhXPQ==}
 
+  '@types/eslint-config-prettier@6.11.3':
+    resolution: {integrity: sha512-3wXCiM8croUnhg9LdtZUJQwNcQYGWxxdOWDjPe1ykCqJFPVpzAKfs/2dgSoCtAvdPeaponcWPI7mPcGGp9dkKQ==}
+
   '@types/eslint-scope@3.7.7':
     resolution: {integrity: sha512-MzMFlSLBqNF2gcHWO0G1vP/YQyfvrxZ0bF+u7mzUdZ1/xK4A4sru+nraZz5i3iEIk1l1uyicaDVTB4QbbEkAYg==}
 
-  '@types/eslint@9.6.1':
-    resolution: {integrity: sha512-FXx2pKgId/WyYo2jXw63kk7/+TY7u7AziEJxJAnSFzHlqTAS3Ync6SvgYAN/k4/PQpnnVuzoMuVnByKK2qp0ag==}
-
   '@types/estree-jsx@1.0.5':
     resolution: {integrity: sha512-52CcUVNFyfb1A2ALocQw/Dd1BQFNmSdkuC3BkZ6iqhdMfQz7JWOFRuJFloOzjk+6WijU56m9oKXFAXc7o3Towg==}
 
@@ -12358,16 +12365,12 @@ snapshots:
     dependencies:
       '@types/ms': 2.1.0
 
+  '@types/eslint-config-prettier@6.11.3': {}
+
   '@types/eslint-scope@3.7.7':
     dependencies:
-      '@types/eslint': 9.6.1
       '@types/estree': 1.0.8
 
-  '@types/eslint@9.6.1':
-    dependencies:
-      '@types/estree': 1.0.8
-      '@types/json-schema': 7.0.15
-
   '@types/estree-jsx@1.0.5':
     dependencies:
       '@types/estree': 1.0.8
@@ -14788,7 +14791,6 @@ snapshots:
     dependencies:
       '@formatjs/icu-messageformat-parser': 2.11.2
       '@formatjs/ts-transformer': 3.14.0
-      '@types/eslint': 9.6.1
       '@types/picomatch': 3.0.2
       '@typescript-eslint/utils': 8.42.0(eslint@9.34.0(jiti@2.5.1))(typescript@5.9.2)
       eslint: 9.34.0(jiti@2.5.1)

version.py

@@ -49,4 +49,4 @@ API_FEATURE_LEVEL = 425
 #   historical commits sharing the same major version, in which case a
 #   minor version bump suffices.
 
-PROVISION_VERSION = (347, 2)  # bumped 2025-09-04 to upgrade Python requirements
+PROVISION_VERSION = (347, 3)  # bumped 2025-09-09 to add @types/eslint-config-prettier

web/src/types/eslint-plugin-no-jquery.d.ts

@@ -0,0 +1,37 @@
+import type {Linter, Rule} from "eslint";
+
+declare const eslintPluginNoJquery: {
+    rules: Record<string, Rule.RuleModule>;
+    configs: {
+        recommended: Linter.LegacyConfig;
+        slim: Linter.LegacyConfig;
+        deprecated: Linter.LegacyConfig;
+        ["deprecated-3.7"]: Linter.LegacyConfig;
+        ["deprecated-3.6"]: Linter.LegacyConfig;
+        ["deprecated-3.5"]: Linter.LegacyConfig;
+        ["deprecated-3.4"]: Linter.LegacyConfig;
+        ["deprecated-3.3"]: Linter.LegacyConfig;
+        ["deprecated-3.2"]: Linter.LegacyConfig;
+        ["deprecated-3.1"]: Linter.LegacyConfig;
+        ["deprecated-3.0"]: Linter.LegacyConfig;
+        ["deprecated-2.2"]: Linter.LegacyConfig;
+        ["deprecated-2.1"]: Linter.LegacyConfig;
+        ["deprecated-2.0"]: Linter.LegacyConfig;
+        ["deprecated-1.12"]: Linter.LegacyConfig;
+        ["deprecated-1.11"]: Linter.LegacyConfig;
+        ["deprecated-1.10"]: Linter.LegacyConfig;
+        ["deprecated-1.9"]: Linter.LegacyConfig;
+        ["deprecated-1.8"]: Linter.LegacyConfig;
+        ["deprecated-1.7"]: Linter.LegacyConfig;
+        ["deprecated-1.6"]: Linter.LegacyConfig;
+        ["deprecated-1.5"]: Linter.LegacyConfig;
+        ["deprecated-1.4"]: Linter.LegacyConfig;
+        ["deprecated-1.3"]: Linter.LegacyConfig;
+        ["deprecated-1.2"]: Linter.LegacyConfig;
+        ["deprecated-1.1"]: Linter.LegacyConfig;
+        ["deprecated-1.0"]: Linter.LegacyConfig;
+        all: Linter.LegacyConfig;
+    };
+};
+
+export = eslintPluginNoJquery;