Radar rules for ESLint

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Radar rules for ESLint to detect bugs and suspicious patterns in your code.
This is a currently maintained fork of SonarJS.


Bug Detection :bug:

Rules in this category aim to find places in code which have a high chance of being bugs, i.e. don't work as intended.

Code Smell Detection :pig:

Code Smells, or maintainability issues, are raised for places of code which might be costly to change in the future. These rules also help to keep the high code quality and readability. And finally some rules report issues on different suspicious code patters.


Node.js (>=6.x).


  • If you don't have ESLint yet configured for your project, follow these instructions.
  • Install eslint-plugin-radar using npm (or yarn) for you project or globally:

npm install eslint-plugin-radar --save-dev # install for your project
npm install eslint-plugin-radar -g         # or install globally

  • Add eslint-plugin-radar to the plugins option of your .eslintrc:

  "plugins": ["radar"]

  • Add plugin:radar/recommended to the extends option to enable all recommended rules:

  "extends": ["plugin:radar/recommended"]

  • or enable only some rules manually:

  "rules": {
    "radar/cognitive-complexity": "error",
    "radar/no-identical-expressions": "error"
    // etc.


You want to participate in the development of the project? Have a look at our contributing guide!