diff --git a/package.json b/package.json
index a78bc250d4..d8b75b1871 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "postinstall": "rm -rf node_modules/markdownlint-cli/node_modules/markdownlint",
     "install:config": "cd packages/eslint-config-airbnb && npm prune && npm install",
     "install:config:base": "cd packages/eslint-config-airbnb-base && npm prune && npm install",
-    "lint": "markdownlint --config linters/.markdownlint.json README.md */README.md",
+    "lint": "markdownlint --config linters/.markdownlint.json README.md */README.md && eslint -c linters/.eslintrc . --ext .js --ext .jsx --ext .mjs",
     "pretest": "npm run --silent lint",
     "test": "npm run --silent test:config && npm run --silent test:config:base",
     "test:config": "cd packages/eslint-config-airbnb; npm test",
@@ -40,6 +40,7 @@
   },
   "homepage": "https://github.com/airbnb/javascript",
   "devDependencies": {
+    "eslint": "^8.57.1",
     "markdownlint": "^0.29.0",
     "markdownlint-cli": "^0.35.0"
   }
diff --git a/packages/eslint-config-airbnb-base/README.md b/packages/eslint-config-airbnb-base/README.md
index 6ddc34dac1..0570045b17 100644
--- a/packages/eslint-config-airbnb-base/README.md
+++ b/packages/eslint-config-airbnb-base/README.md
@@ -62,6 +62,16 @@ Our default export contains all of our ESLint rules, including ECMAScript 6+. It
 
 2. Add `"extends": "airbnb-base"` to your .eslintrc.
 
+> **Note**: ESLint only lints `.js` files by default.  
+  
+  If your project uses `.jsx` (or `.tsx` with TypeScript), you need to pass extensions to the CLI:  
+
+  ```sh
+  eslint . --ext .js, .jsx, .mjs
+  ```
+
+  Without this, JSX-related rules will not apply to `.jsx` files.
+
 ### eslint-config-airbnb-base/legacy
 
 Lints ES5 and below. Requires `eslint` and `eslint-plugin-import`.
diff --git a/packages/eslint-config-airbnb/README.md b/packages/eslint-config-airbnb/README.md
index 3b3f43196d..b0597cd58f 100644
--- a/packages/eslint-config-airbnb/README.md
+++ b/packages/eslint-config-airbnb/README.md
@@ -58,6 +58,15 @@ If you don't need React, see [eslint-config-airbnb-base](https://npmjs.com/eslin
 
 2. Add `"extends": "airbnb"` to your `.eslintrc`
 
+> **Note**: ESLint only lints `.js` files by default.  
+  If your project uses `.jsx` (or `.tsx` with TypeScript), you need to pass extensions to the CLI:  
+
+  ```sh
+  eslint . --ext .js, .jsx, .mjs
+  ```
+
+  Without this, JSX-related rules will not apply to `.jsx` files.
+
 ### eslint-config-airbnb/hooks
 
 This entry point enables the linting rules for React hooks (requires v16.8+). To use, add `"extends": ["airbnb", "airbnb/hooks"]` to your `.eslintrc`.