babel/eslint/babel-eslint-plugin/README.md

@babel/eslint-plugin

Companion rules for @babel/eslint-parser. @babel/eslint-parser does a great job at adapting eslint for use with Babel, but it can't change the built in rules to support experimental features. @babel/eslint-plugin re-implements problematic rules so they do not give false positives or negatives.

Requires Node 10.9 or greater

Install

npm install @babel/eslint-plugin --save-dev

Load the plugin in your .eslintrc.json file:

{
  "plugins": ["@babel/eslint-plugin"]
}

Finally enable all the rules you would like to use (remember to disable the original ones as well!).

{
  "rules": {
    "babel/camelcase": "error",
    "babel/new-cap": "error",
    "babel/no-invalid-this": "error",
    "babel/no-unused-expressions": "error",
    "babel/object-curly-spacing": "error",
    "babel/semi": "error",
  }
}

Rules

Each rule corresponds to a core eslint rule, and has the same options.

🛠: means it's autofixable with --fix.

• babel/camelcase: doesn't complain about optional chaining (var foo = bar?.a_b;`)
• babel/new-cap: Ignores capitalized decorators (@Decorator)
• babel/no-invalid-this: doesn't fail when inside class properties (class A { a = this.b; })
• babel/no-unused-expressions: doesn't fail when using do expressions or optional chaining (a?.b()).
• babel/object-curly-spacing: doesn't complain about export x from "mod"; or export * as x from "mod"; (🛠)
• babel/semi: doesn't fail when using for await (let something of {}). Includes class properties (🛠)