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Typescript with Eslint
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Typescript with Eslint

Firstly you may need to install eslint

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npm install eslint

Then init and create a config fiel:

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eslint --init

And choose the style you want, and then it will automatically install all necessary dependencies. For example for Airbnb Standard we may need to install:

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eslint-plugin-react@^7.14.3
@typescript-eslint/eslint-plugin@latest
eslint-config-airbnb@latest
eslint@^5.16.0||^6.1.0
eslint-plugin-import@^2.18.2
eslint-plugin-jsx-a11y@^6.2.3
eslint-plugin-react-hooks@^1.7.0
@typescript-eslint/parser@latest

Make sure all packages installed, then you can install eslint plugin/extension from your IDE, the configured eslint should work now.

Troubleshooting

Unable to resolve path for .tsx

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Unable to resolve path to module './serviceWorker'.eslint(import/no-unresolved)

You just need to add 1 more properties into .eslintrc.json configuration file:

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

JSX not allowed in files with extension ‘.tsx’

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"rules": {
    "react/jsx-filename-extension": [
        1,
        {
            "extensions": [
                ".js",
                ".tsx",
                ".jsx"
            ]
        }
    ],
},

Typescript interface shows unused

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import {
  iStates
} from './Interfaces';
// iState shows error that no-unused-vars

class CommentTree extends React.Component<iStates> {
...
}
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"eslint:recommended",
"plugin:@typescript-eslint/eslint-recommended",
"plugin:@typescript-eslint/recommended"

Reference