feat(eslint-plugin-query): initial commit

docs/config.json

@@ -298,6 +298,23 @@
         }
       ]
     },
+    {
+      "label": "ESLint",
+      "children": [
+        {
+          "label": "ESLint Plugin Query",
+          "to": "eslint/eslint-plugin-query"
+        },
+        {
+          "label": "Exhaustive Deps",
+          "to": "eslint/exhaustive-deps"
+        },
+        {
+          "label": "prefer-query-object-syntax",
+          "to": "eslint/prefer-query-object-syntax"
+        }
+      ]
+    },
     {
       "label": "Plugins",
       "children": [

docs/eslint/eslint-plugin-query.md

@@ -0,0 +1,49 @@
+---
+id: eslint-plugin-query
+title: ESLint Plugin Query
+---
+
+TanStack Query comes with its own ESLint plugin. This plugin is used to enforce best practices and to help you avoid common mistakes.
+
+## Installation
+
+The plugin is a separate package that you need to install:
+
+```bash
+$ npm i @tanstack/eslint-plugin-query
+# or
+$ pnpm add @tanstack/eslint-plugin-query
+# or
+$ yarn add @tanstack/eslint-plugin-query
+```
+
+## Usage
+
+Add `@tanstack/eslint-plugin-query` to the plugins section of your `.eslintrc` configuration file:
+
+```json
+{
+  "plugins": ["@tanstack/query"]
+}
+```
+
+Then configure the rules you want to use under the rules section:
+
+```json
+{
+  "rules": {
+    "@tanstack/query/exhaustive-deps": "error",
+    "@tanstack/query/prefer-query-object-syntax": "error"
+  }
+}
+```
+
+### Recommended config
+
+You can also enable all the recommended rules for our plugin. Add `plugin:@tanstack/eslint-plugin-query/recommended` in extends:
+
+```json
+{
+  "extends": ["plugin:@tanstack/eslint-plugin-query/recommended"]
+}
+```

docs/eslint/exhaustive-deps.md

@@ -0,0 +1,47 @@
+---
+id: exhaustive-deps
+title: Exhaustive dependencies for query keys
+---
+
+Query keys should be seen like a dependency array to your query function: Every variable that is used inside the queryFn should be added to the query key.
+This makes sure that queries are cached independently and that queries are refetched automatically when the variables changes.
+
+## Rule Details
+
+Examples of **incorrect** code for this rule:
+
+```ts
+/* eslint "@tanstack/query/exhaustive-deps": "error" */
+
+useQuery({
+    queryKey: ["todo"],
+    queryFn: () => api.getTodo(todoId)
+})
+
+const todoQueries = {
+    detail: (id) => ({ queryKey: ["todo"], queryFn: () => api.getTodo(id) })
+}
+```
+
+
+Examples of **correct** code for this rule:
+
+```ts
+useQuery({
+    queryKey: ["todo", todoId],
+    queryFn: () => api.getTodo(todoId)
+})
+
+const todoQueries = {
+    detail: (id) => ({ queryKey: ["todo", id], queryFn: () => api.getTodo(id) })
+}
+```
+
+## When Not To Use It
+
+If you don't care about the rules of the query keys, then you will not need this rule.
+
+## Attributes
+
+- [x] ✅ Recommended
+- [x] 🔧 Fixable

docs/eslint/prefer-query-object-syntax.md

@@ -0,0 +1,62 @@
+---
+id: prefer-query-object-syntax
+title: Prefer object syntax for useQuery
+---
+
+You can use [`useQuery`](https://tanstack.com/query/v4/docs/reference/useQuery) in two different ways.
+
+Standard
+
+```ts
+useQuery(queryKey, queryFn?, options?)
+
+// or
+
+useQuery(options)
+```
+
+This rule prefers the second option, as it is more consistent with other React Query hooks, like `useQueries`. It will also be the only available option in a future major version.
+
+## Rule Details
+
+Examples of **incorrect** code for this rule:
+
+```js
+/* eslint "@tanstack/query/prefer-query-object-syntax": "error" */
+
+import { useQuery } from '@tanstack/react-query';
+
+useQuery(queryKey, queryFn, {
+  onSuccess,
+});
+
+useQuery(queryKey, {
+  queryFn,
+  onSuccess,
+});
+```
+
+Examples of **correct** code for this rule:
+
+```js
+import { useQuery } from '@tanstack/react-query';
+
+useQuery({
+  queryKey,
+  queryFn,
+  onSuccess,
+});
+```
+
+## When Not To Use It
+
+If you don't care about useQuery consistency, then you will not need this rule.
+
+## Attributes
+
+- [x] ✅ Recommended
+- [x] 🔧 Fixable
+
+## Credits
+
+This rule was initially developed by [KubaJastrz](https://github.com/KubaJastrz) in [eslint-plugin-react-query](https://github.com/KubaJastrz/eslint-plugin-react-query).

examples/react/basic-typescript/.eslintrc

@@ -1,7 +1,3 @@
 {
-  "extends": ["react-app", "prettier"],
-  "rules": {
-    // "eqeqeq": 0,
-    // "jsx-a11y/anchor-is-valid": 0
-  }
+  "extends": ["react-app", "prettier", "plugin:@tanstack/eslint-plugin-query/recommended"]
 }

examples/react/basic-typescript/package.json

@@ -17,6 +17,7 @@
     "@tanstack/query-sync-storage-persister": "^4.7.1"
   },
   "devDependencies": {
+    "@tanstack/eslint-plugin-query": "^4.13.0",
     "@types/react": "^17.0.3",
     "@types/react-dom": "^17.0.3",
     "@vitejs/plugin-react": "^2.0.0",

examples/react/basic/.eslintrc

@@ -1,7 +1,3 @@
 {
-  "extends": ["react-app", "prettier"],
-  "rules": {
-    // "eqeqeq": 0,
-    // "jsx-a11y/anchor-is-valid": 0
-  }
+  "extends": ["react-app", "prettier", "plugin:@tanstack/eslint-plugin-query/recommended"]
 }

examples/react/basic/package.json

@@ -8,13 +8,14 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@tanstack/react-query": "^4.7.1",
+    "@tanstack/react-query-devtools": "^4.7.1",
     "axios": "^0.21.1",
     "react": "^18.0.0",
-    "react-dom": "^18.0.0",
-    "@tanstack/react-query": "^4.7.1",
-    "@tanstack/react-query-devtools": "^4.7.1"
+    "react-dom": "^18.0.0"
   },
   "devDependencies": {
+    "@tanstack/eslint-plugin-query": "^4.13.0",
     "@vitejs/plugin-react": "^2.0.0",
     "vite": "^3.0.0"
   },

examples/react/basic/src/index.jsx

@@ -38,11 +38,14 @@ function App() {
 }
 
 function usePosts() {
-  return useQuery(["posts"], async () => {
-    const { data } = await axios.get(
-      "https://jsonplaceholder.typicode.com/posts"
-    );
-    return data;
+  return useQuery({
+    queryKey: ["posts"],
+    queryFn: async () => {
+      const { data } = await axios.get(
+        "https://jsonplaceholder.typicode.com/posts"
+      );
+      return data;
+    },
   });
 }
 
@@ -98,7 +101,9 @@ const getPostById = async (id) => {
 };
 
 function usePost(postId) {
-  return useQuery(["post", postId], () => getPostById(postId), {
+  return useQuery({
+    queryKey: ["post", postId],
+    queryFn: () => getPostById(postId),
     enabled: !!postId,
   });
 }

examples/solid/simple/.eslintrc

@@ -1,4 +1,5 @@
 {
+  "extends": ["plugin:@tanstack/eslint-plugin-query/recommended"],
   "parserOptions": {
     "project": "./tsconfig.json",
     "sourceType": "module"

examples/solid/simple/package.json

@@ -14,6 +14,7 @@
     "solid-js": "^1.5.1"
   },
   "devDependencies": {
+    "@tanstack/eslint-plugin-query": "^4.13.0",
     "typescript": "^4.8.2",
     "vite": "^3.0.9",
     "vite-plugin-solid": "^2.3.9"

package.json

@@ -44,8 +44,8 @@
     "@types/react": "^18.0.14",
     "@types/react-dom": "^18.0.5",
     "@types/testing-library__jest-dom": "^5.14.5",
-    "@typescript-eslint/eslint-plugin": "^5.6.0",
-    "@typescript-eslint/parser": "^5.6.0",
+    "@typescript-eslint/eslint-plugin": "^5.41.0",
+    "@typescript-eslint/parser": "^5.41.0",
     "axios": "^0.26.1",
     "babel-eslint": "^10.1.0",
     "babel-jest": "^27.5.1",

packages/eslint-plugin-query/.eslintrc

@@ -0,0 +1,7 @@
+{
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "project": "./tsconfig.json",
+    "sourceType": "module"
+  }
+}

packages/eslint-plugin-query/jest.config.ts

@@ -0,0 +1,4 @@
+export default {
+  displayName: 'eslint-plugin-query',
+  preset: '../../jest-preset.js',
+}

packages/eslint-plugin-query/package.json

@@ -0,0 +1,44 @@
+{
+  "name": "@tanstack/eslint-plugin-query",
+  "version": "4.13.0",
+  "description": "ESLint plugin for TanStack Query",
+  "author": "Eliya Cohen",
+  "license": "MIT",
+  "repository": "tanstack/query",
+  "homepage": "https://tanstack.com/query",
+  "funding": {
+    "type": "github",
+    "url": "https://github.com/sponsors/tannerlinsley"
+  },
+  "main": "build/lib/index.js",
+  "scripts": {
+    "typecheck": "tsc",
+    "build": "tsup --minify",
+    "dev": "tsup --watch --sourcemap",
+    "clean": "rm -rf ./build",
+    "test:jest": "../../node_modules/.bin/jest --config ./jest.config.ts",
+    "test:eslint": "../../node_modules/.bin/eslint --ext .ts,.tsx ./src",
+    "test:dev": "pnpm run test:jest --watch"
+  },
+  "files": [
+    "build"
+  ],
+  "tsup": {
+    "entry": [
+      "src/index.ts"
+    ],
+    "external": [
+      "eslint"
+    ],
+    "clean": true,
+    "bundle": true,
+    "outDir": "build/lib"
+  },
+  "devDependencies": {
+    "@typescript-eslint/eslint-plugin": "^5.41.0",
+    "@typescript-eslint/parser": "^5.41.0",
+    "@typescript-eslint/utils": "^5.41.0",
+    "eslint": "^8.26.0",
+    "tsup": "^6.3.0"
+  }
+}

packages/eslint-plugin-query/src/configs/index.test.ts

@@ -0,0 +1,19 @@
+import { configs } from './index'
+
+describe('configs', () => {
+  it('should match snapshot', () => {
+    expect(configs).toMatchInlineSnapshot(`
+      {
+        "recommended": {
+          "plugins": [
+            "@tanstack/eslint-plugin-query",
+          ],
+          "rules": {
+            "@tanstack/query/exhaustive-deps": "error",
+            "@tanstack/query/prefer-query-object-syntax": "error",
+          },
+        },
+      }
+    `)
+  })
+})

packages/eslint-plugin-query/src/configs/index.ts

@@ -0,0 +1,22 @@
+import type { TSESLint } from '@typescript-eslint/utils'
+import { rules } from '../rules'
+
+function generateRecommendedConfig(
+  allRules: Record<string, TSESLint.RuleModule<any, any>>,
+) {
+  return Object.entries(allRules).reduce((memo, [name, rule]) => {
+    const { recommended } = rule.meta.docs || {}
+
+    return {
+      ...memo,
+      ...(recommended ? { [`@tanstack/query/${name}`]: recommended } : {}),
+    }
+  }, {} as Record<string, 'strict' | 'error' | 'warn'>)
+}
+
+export const configs = {
+  recommended: {
+    plugins: ['@tanstack/eslint-plugin-query'],
+    rules: generateRecommendedConfig(rules),
+  },
+}

packages/eslint-plugin-query/src/index.ts

@@ -0,0 +1,2 @@
+export { configs } from './configs'
+export { rules } from './rules'