.eslintrc.json

{
  "env": {
    "es6": true,
    "node": true
  },
  "extends": ["eslint:recommended", "plugin:react/recommended"],
  "parserOptions": {
    "ecmaVersion": 2018,
    "sourceType": "module",
      "ecmaFeatures": {
          "jsx": true
      }
  },
  "plugins": [
  "react"
  ],
  "ignorePatterns": [
  "/app/js/MathJax-*/*"
  ],
	"rules": {
      "no-const-assign": 0,
      "no-unused-vars": 0
  },
  "settings": {
    "react": {
      "createClass": "createReactClass", // Regex for Component Factory to use,
                                         // default to "createReactClass"
      "pragma": "React",  // Pragma to use, default to "React"
      "fragment": "Fragment",  // Fragment to use (may be a property of <pragma>), default to "Fragment"
      "version": "detect" // React version. "detect" automatically picks the version you have installed.
                           // You can also use `16.0`, `16.3`, etc, if you want to override the detected value.
                           // default to latest and warns if missing
                           // It will default to "detect" in the future
    }
  }
}