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Merge pull request #4 from typescript-eslint/flat-configs
feat: examples for flat configs and type information
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‎package-lock.json

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‎package.json

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"version": "0.0.0",
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"description": "Various examples of working with typescript-eslint. 📝",
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"main": "index.js",
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"repository": "https://github.com/typescript-eslint/typescript-eslint-examples",
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"repository": "typescript-eslint/typescript-eslint-examples",
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"author": "Josh Goldberg <[email protected]>",
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"license": "MIT",
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"workspaces": [

‎packages/flat-config-disable-type-checked/README.md

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# Example: Flat Config and disable-type-checked
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An example of using the [`typescript-eslint`](https://typescript-eslint.io/packages/typescript-eslint) package to lint TypeScript code with type information.
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## Setup
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```shell
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npm i
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```
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## Usage
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```shell
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npm run lint
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```
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```plaintext
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> [email protected] lint
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> eslint .
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~/typescript-eslint-examples/packages/flat-config-disable-type-checked/eslint.config.js
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6:7 error 'unused' is assigned a value but never used @typescript-eslint/no-unused-vars
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~/typescript-eslint-examples/packages/flat-config-disable-type-checked/src/index.ts
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8:5 error Unexpected `await` of a non-Promise (non-"Thenable") value @typescript-eslint/await-thenable
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```

‎packages/flat-config-disable-type-checked/eslint.config.js

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// @ts-check
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import eslint from "@eslint/js";
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import tseslint from "typescript-eslint";
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const unused = true;
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export default tseslint.config(
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eslint.configs.recommended,
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...tseslint.configs.recommendedTypeChecked,
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{
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languageOptions: {
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parserOptions: {
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project: true,
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},
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},
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},
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{
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files: ["*.js"],
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...tseslint.configs.disableTypeChecked,
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}
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);

‎packages/flat-config-disable-type-checked/package.json

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{
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"name": "flat-config-disable-type-checked",
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"version": "0.0.0",
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"description": "Example of using `typescript-eslint` with ESLint's flat config and type information, with disable-type-checked for .js files.",
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"main": "index.ts",
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"repository": {
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"directory": "packages/flat-config-disable-type-checked",
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"type": "git",
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"url": "https://github.com/typescript-eslint/typescript-eslint-examples"
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},
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"license": "MIT",
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"devDependencies": {
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"typescript-eslint": "*",
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"typescript": "^5.3.3",
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"eslint": "^8.56.0"
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},
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"scripts": {
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"lint": "eslint ."
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},
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"type": "module"
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}

‎packages/flat-config-disable-type-checked/src/index.ts

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export interface GreetOptions {
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message: string;
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times: number;
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}
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export async function greet({ message, times }: GreetOptions) {
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for (let i = 0; i < times; i += 1) {
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await console.log(message);
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}
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}

‎packages/flat-config-disable-type-checked/tsconfig.json

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{
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"compilerOptions": {
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"module": "NodeNext",
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"moduleResolution": "NodeNext",
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"strict": true
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},
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"include": ["src"]
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}

‎packages/flat-config-typed-tsconfig/README.md

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# Example: Flat Config Typed with a TSConfig
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An example of using the [`typescript-eslint`](https://typescript-eslint.io/packages/typescript-eslint) package to lint TypeScript code with type information and a `tsconfig.eslint.json`.
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## Setup
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```shell
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npm i
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```
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## Usage
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```shell
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npm run lint
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```
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```plaintext
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> [email protected] lint
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> eslint .
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~/typescript-eslint-examples/packages/flat-config-typed-tsconfig/eslint.config.js
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6:8 error Async function 'unecessarilyAsync' has no 'await' expression @typescript-eslint/require-await
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~/typescript-eslint-examples/packages/flat-config-typed-tsconfig/src/index.ts
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8:5 error Unexpected `await` of a non-Promise (non-"Thenable") value @typescript-eslint/await-thenable
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```

‎packages/flat-config-typed-tsconfig/eslint.config.js

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// @ts-check
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import eslint from "@eslint/js";
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import tseslint from "typescript-eslint";
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export async function unecessarilyAsync() {
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return true;
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}
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export default tseslint.config(
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eslint.configs.recommended,
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...tseslint.configs.recommendedTypeChecked,
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{
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languageOptions: {
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parserOptions: {
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project: "tsconfig.eslint.json",
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},
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},
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}
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);

‎packages/flat-config-typed-tsconfig/package.json

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{
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"name": "flat-config-typed-tsconfig",
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"version": "0.0.0",
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"description": "Example of using `typescript-eslint` with ESLint's flat config, type information, and a `tsconfig.eslint.json`.",
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"main": "index.ts",
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"repository": {
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"directory": "packages/flat-config-typed-tsconfig",
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"type": "git",
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"url": "https://github.com/typescript-eslint/typescript-eslint-examples"
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},
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"license": "MIT",
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"devDependencies": {
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"@types/eslint__js": "^8.42.3",
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"eslint": "^8.56.0",
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"typescript": "^5.3.3",
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"typescript-eslint": "*"
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},
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"scripts": {
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"lint": "eslint ."
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},
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"type": "module"
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}

‎packages/flat-config-typed-tsconfig/src/index.ts

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export interface GreetOptions {
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message: string;
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times: number;
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}
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export async function greet({ message, times }: GreetOptions) {
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for (let i = 0; i < times; i += 1) {
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await console.log(message);
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}
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}

‎packages/flat-config-typed-tsconfig/tsconfig.eslint.json

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{
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"extends": "./tsconfig.json",
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"compilerOptions": {
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"allowJs": true,
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"noEmit": true
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},
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"include": ["."]
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}

‎packages/flat-config-typed-tsconfig/tsconfig.json

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{
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"compilerOptions": {
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"module": "NodeNext",
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"moduleResolution": "NodeNext",
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"strict": true
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},
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"include": ["src"]
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}

‎packages/flat-config-typed/README.md

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# Example: Flat Config (Typed)
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An example of using the [`typescript-eslint`](https://typescript-eslint.io/packages/typescript-eslint) package to lint TypeScript code with type information.
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## Setup
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```shell
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npm i
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```
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## Usage
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```shell
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npm run lint
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```
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```plaintext
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> [email protected] lint
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> eslint src
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~/typescript-eslint-examples/packages/flat-config-typed/src/index.ts
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8:5 error Unexpected `await` of a non-Promise (non-"Thenable") value @typescript-eslint/await-thenable
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```

‎packages/flat-config-typed/eslint.config.js

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// @ts-check
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import eslint from "@eslint/js";
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import tseslint from "typescript-eslint";
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export default tseslint.config(
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eslint.configs.recommended,
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...tseslint.configs.recommendedTypeChecked,
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{
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languageOptions: {
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parserOptions: {
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project: true,
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},
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},
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}
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);

‎packages/flat-config-typed/package.json

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{
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"name": "flat-config-typed",
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"version": "0.0.0",
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"description": "Example of using `typescript-eslint` with ESLint's flat config and type information.",
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"main": "index.ts",
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"repository": {
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"directory": "packages/flat-config-typed",
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"type": "git",
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"url": "https://github.com/typescript-eslint/typescript-eslint-examples"
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},
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"license": "MIT",
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"devDependencies": {
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"typescript-eslint": "*",
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"typescript": "^5.3.3",
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"eslint": "^8.56.0"
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},
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"scripts": {
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"lint": "eslint src"
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},
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"type": "module"
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}

‎packages/flat-config-typed/src/index.ts

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export interface GreetOptions {
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message: string;
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times: number;
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}
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export async function greet({ message, times }: GreetOptions) {
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for (let i = 0; i < times; i += 1) {
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await console.log(message);
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}
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}

‎packages/flat-config-typed/tsconfig.json

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{
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"compilerOptions": {
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"module": "NodeNext",
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"moduleResolution": "NodeNext",
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"strict": true
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},
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"include": ["src"]
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}

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