From 7d1d73ee167dbef479a2ca63cc4da321d118b02a Mon Sep 17 00:00:00 2001
From: Ihor Diachenko <ih.diachenko@gmail.com>
Date: Tue, 4 Jun 2024 02:57:16 +0300
Subject: [PATCH] FIxed recommended config for legacy `eslintrc` config format
 (#36)

* Added v8 compatibility test

* Added a legacy config

* Clean up scripts

* updated readme

* Keep things the same for eslintrc

* Imporved the naming
---
 README.md        |  2 +-
 eslint.config.js |  2 +-
 lib/index.js     | 14 +++++++++++++-
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 1da66c9..3aeb5d8 100644
--- a/README.md
+++ b/README.md
@@ -71,7 +71,7 @@ ESLint 9 flat config format:
 const pluginChaiFriendly = require("eslint-plugin-chai-friendly");
 
 module.exports = [
-    pluginChaiFriendly.configs.recommended,
+    pluginChaiFriendly.configs.recommendedFlat,
     // other configurations
 ]
 ```
diff --git a/eslint.config.js b/eslint.config.js
index 38b5133..8a5dac4 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -3,7 +3,7 @@
 const pluginChaiFriendly = require("./lib");
 
 module.exports = [
-    pluginChaiFriendly.configs.recommended,
+    pluginChaiFriendly.configs.recommendedFlat,
     {
         ignores: ["node_modules", "!.eslintrc.js", "examples"],
     }
diff --git a/lib/index.js b/lib/index.js
index ce484da..23a103e 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -19,7 +19,8 @@ const plugin = {
 
 // assign configs here so we can reference `plugin`
 Object.assign(plugin.configs, {
-    recommended: {
+    // Compatible with ESLint v9 flat configs
+    recommendedFlat: {
         plugins: {
             'chai-friendly': plugin
         },
@@ -27,6 +28,17 @@ Object.assign(plugin.configs, {
             'chai-friendly/no-unused-expressions': 'error',
             'no-unused-expressions': 'off'
         }
+    },
+
+    // Compatible with ESLint <9 eslintrc configs
+    recommended: {
+        plugins: [
+            'chai-friendly'
+        ],
+        rules: {
+            'no-unused-expressions': 0, // disable original rule
+            'chai-friendly/no-unused-expressions': 2
+        }
     }
 },)