add new rule to the index

Author: francoismassart

README.md

@@ -9,9 +9,10 @@
 🔧 Automatically fixable by the [`--fix` CLI option](https://eslint.org/docs/user-guide/command-line-interface#--fix).\
 💡 Manually fixable by [editor suggestions](https://eslint.org/docs/latest/use/core-concepts#rule-suggestions).
 
-| Name                                               | Description                                                                         | 🔧 | 💡 |
-| :------------------------------------------------- | :---------------------------------------------------------------------------------- | :- | :- |
-| [classnames-order](docs/rules/classnames-order.md) | Enforces a consistent order for the Tailwind CSS classnames, based on the compiler. | 🔧 | 💡 |
+| Name                                                     | Description                                                                         | 🔧 | 💡 |
+| :------------------------------------------------------- | :---------------------------------------------------------------------------------- | :- | :- |
+| [classnames-order](docs/rules/classnames-order.md)       | Enforces a consistent order for the Tailwind CSS classnames, based on the compiler. | 🔧 | 💡 |
+| [no-custom-classname](docs/rules/no-custom-classname.md) | Detects classnames which do not belong to Tailwind CSS.                             |    | 💡 |
 
 <!-- end auto-generated rules list -->
 

docs/rules/no-custom-classname.md

@@ -0,0 +1,15 @@
+# Detects classnames which do not belong to Tailwind CSS
+
+💡 This rule is manually fixable by [editor suggestions](https://eslint.org/docs/latest/use/core-concepts#rule-suggestions).
+
+<!-- end auto-generated rule header -->
+
+## Options
+
+<!-- begin auto-generated rule options list -->
+
+| Name        | Type     |
+| :---------- | :------- |
+| `whitelist` | String[] |
+
+<!-- end auto-generated rule options list -->

src/rules/index.ts

@@ -2,7 +2,12 @@ import {
   classnamesOrder,
   RULE_NAME as CLASSNAMES_ORDER,
 } from "./classnames-order";
+import {
+  noCustomClassname,
+  RULE_NAME as NO_CUSTOM_CLASSNAME,
+} from "./no-custom-classname";
 
 export const rules = {
   [CLASSNAMES_ORDER]: classnamesOrder,
+  [NO_CUSTOM_CLASSNAME]: noCustomClassname,
 };