Typescript eslint - Missing file extension "ts" import/extensions

I have a simple Node/Express app made with Typescript. And eslint give me the error

Missing file extension "ts" for "./lib/env" import/extensions

Here is my .eslintrc file

    {
  "extends": [
    "airbnb",
    "plugin:@typescript-eslint/recommended",
    "prettier",
    "prettier/react",
    "plugin:import/errors",
    "plugin:import/warnings",
    "plugin:import/typescript"
  ],
  "parser": "@typescript-eslint/parser",
  "plugins": ["@typescript-eslint", "prettier", "import"],
  "settings": {
    "import/extensions": [".js", ".jsx", ".ts", ".tsx"],
    "import/parsers": {
      "@typescript-eslint/parser": [".ts", ".tsx"]
    },
    "import/resolver": {
      "typescript": {
        "directory": "./tsconfig.json"
      },
      "node": {
        "extensions": [".js", ".jsx", ".ts", ".tsx"]
      }
    }
  },
  "rules": {
    "@typescript-eslint/indent": [2, 2],
    "no-console": "off",
    "import/no-unresolved": [2, { "commonjs": true, "amd": true }],
    "import/named": 2,
    "import/namespace": 2,
    "import/default": 2,
    "import/export": 2
  }
}

I have installed eslint-plugin-import & eslint-import-resolver-typescript. And I cannot figure out why, I got that error.

Add the following code to rules:

"rules": {
   "import/extensions": [
      "error",
      "ignorePackages",
      {
        "js": "never",
        "jsx": "never",
        "ts": "never",
        "tsx": "never"
      }
   ]
}

airbnb ESLint config leads the problem.

I know this is late, but if you're extending the Airbnb rules you can use eslint-config-airbnb-typescript. Please refer to the project page for the latest instructions. Here's the gist of it as of March 2022:

Install

npm install -D eslint-config-airbnb-typescript

ESLint config file

using React - add 'airbnb-typescript' after 'airbnb'

extends: [
  'airbnb',
+ 'airbnb-typescript'
]

without React - add 'airbnb-typescript/base' after 'airbnb-base'

extends: [
  'airbnb-base',
+ 'airbnb-typescript/base'
]

set parserOptions.project to path of your tsconfig.json

{
  extends: ['airbnb', 'airbnb-typescript'],
+ parserOptions: {
+   project: './tsconfig.json'
+ }
}

---

NOTE: Prior to August 2021, you would need to also do the following tasks. These instructions are remaining here for historical reference only. You should not need to do this any more.

First uninstall the old one and add the new one:

# uninstall whichever one you're using
npm uninstall eslint-config-airbnb
npm uninstall eslint-config-airbnb-base

# install the typescript one
npm install -D eslint-config-airbnb-typescript

Then update your ESlint config, remove the old Airbnb from the "extends" section and add the new one:

extends: ["airbnb-typescript"]

If you're like me trying to configure babel, legacy Javascript, and new typescript files and attempting to enable extension free imports on *.ts then I was running into this ESLint issue (where I also found below solution):

In addition to the rules config:

"rules": {
   "import/extensions": [
      "error",
      "ignorePackages",
      {
        "js": "never",
        "mjs": "never",
        "jsx": "never",
        "ts": "never",
        "tsx": "never"
      }
   ]
}

You also need an additional settings entry in your .eslintrc.js:

  "settings": {
    "import/extensions": [".js", ".mjs", ".jsx", ".ts", ".tsx"]
  },

Good luck!

got this working by bundling all answers I found on internet:

this is the end result for me:

{
  "settings": {
    "import/extensions": [".js", ".jsx", ".ts", ".tsx"],
    "import/parsers": {
      "@typescript-eslint/parser": [".ts", ".tsx"]
    },
    "import/resolver": {
      "node": {
        "extensions": [".js", ".jsx", ".ts", ".tsx"]
      }
    }
  },

  "env": {
    "browser": true,
    "es2021": true
  },

  "extends": ["plugin:react/recommended", "airbnb"],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": 12,
    "sourceType": "module"
  },
  "plugins": ["import", "react", "@typescript-eslint"],
  "rules": {
    "no-console": 1,
    "import/extensions": [
      "error",
      "ignorePackages",
      {
        "js": "never",
        "jsx": "never",
        "ts": "never",
        "tsx": "never",
        "mjs": "never"
      }
    ]
  }
}

im using react native btw. if u're using something different just removing react related should be enough

Important to add import extension and parser to .eslintrc

    "settings": {
    "import/extensions": [".js", ".jsx", ".ts", ".tsx"],
    "import/parsers": {
      "@typescript-eslint/parser": [".ts", ".tsx"]
    },
    "import/resolver": {
      "node": {
        "extensions": [".js", ".jsx", ".ts", ".tsx"]
      }
    }
  }
},

Further add to rules:

 "import/extensions": [
  "error",
  "ignorePackages",
  {
    "js": "never",
    "jsx": "never",
    "ts": "never",
    "tsx": "never"
  }
]



enter code here

Following is a similar error that can be thrown due to '~' in imports:

> Missing file extension for "~/path/" > eslintimport/extensions\

Solution 1:

This issue can be resolved by configuring tsconfig.json and .eslintrc.js as follows.

tsconfig.json

...
“paths”: {
 “~*”: [“./src/*”],
},
...

.eslintrc.js

...
settings: {
  'import/resolver': {
     alias: {
       map: [['~', './src/']],
       extensions: ['.ts', '.js', '.tsx'],
     },
   },
},
...

Solution 2:

If the error still persists, then probably you must have opened the project in another directory other than the root directory (the directory where tsconfig.json and .eslintrc.js are located). Therefore opening the directory other than the root directory can confuse the eslint in identifying the path correctly, and throw the above error.