How To Run Typescript Eslint On Ts Files And Eslint On Js Files In The Same Project In Vscode

Running TypeScript ESLint on `.ts` files and ESLint on `.js` files within the same project in VSCode can help you maintain consistent coding standards across different file types. Having proper linting set up can improve code quality and identify potential issues early in the development process. Here's a guide on how to achieve this setup efficiently.

Firstly, you will need to have ESLint and TypeScript ESLint extensions installed in your VSCode environment. You can easily find and install these extensions directly from the VSCode marketplace. Once installed, make sure to reload your VSCode window to activate the extensions.

Next, you will need to set up your ESLint configuration. For TypeScript files (`.ts`), create an `eslint` configuration file named `.eslintrc.json` in the root of your project directory. You can use the following sample configuration as a starting point:

{
  "parser": "@typescript-eslint/parser",
  "plugins": ["@typescript-eslint"],
  "extends": [
    "plugin:@typescript-eslint/recommended",
    "airbnb-base"
  ],
  "parserOptions": {
    "project": "./tsconfig.json"
  },
  "rules": {
    // Add custom rules here
  }
}

Ensure that the `parser` is set to `@typescript-eslint/parser`, and you are extending the necessary TypeScript ESLint configurations. Adjust rules according to your project's requirements.

For JavaScript files (`.js`), you can configure ESLint separately by creating another `.eslintrc.json` file in the root of your project. Here is a basic example configuration for JavaScript files:

{
  "extends": [
    "eslint:recommended"
  ],
  "rules": {
    // Add custom rules here
  }
}

With these configurations in place, you can tell ESLint to lint different file types accordingly. Make sure your ESLint and TypeScript ESLint extensions are enabled in the VSCode settings.

To make the setup more convenient, you can create separate VSCode tasks to run ESLint on TypeScript and JavaScript files separately. Open your VSCode `tasks.json` file and add the following task configurations:

{
  "version": "2",
  "tasks": [
    {
      "label": "lint-ts",
      "type": "shell",
      "command": "eslint --ext .ts .",
      "group": {
        "kind": "build",
        "isDefault": true
      }
    },
    {
      "label": "lint-js",
      "type": "shell",
      "command": "eslint --ext .js .",
      "group": {
        "kind": "build",
        "isDefault": true
      }
    }
  ]
}

These tasks will allow you to run ESLint on TypeScript and JavaScript files separately within your VSCode environment.

By following these steps, you can effectively run TypeScript ESLint on `.ts` files and ESLint on `.js` files in the same project in VSCode. This setup can help you maintain consistent coding standards and improve the overall code quality of your project. Experiment with different ESLint configurations to best suit your project's needs, and happy coding!