Skip to main content

lines-between-class-members

danger
We strongly recommend you do not use this rule or any other formatting linter rules. Use a separate dedicated formatter instead. See What About Formatting? for more information.

Require or disallow an empty line between class members.

🔧

Some problems reported by this rule are automatically fixable by the --fix ESLint command line option.

This rule improves readability by enforcing lines between class members. It will not check empty lines before the first member and after the last member. This rule will require or disallow an empty line between class members.

Examples​

This rule extends the base eslint/lines-between-class-members rule. It adds support for ignoring overload methods in a class.

How to Use​

.eslintrc.cjs
module.exports = {
  "rules": {
    // Note: you must disable the base rule as it can report incorrect errors
    "lines-between-class-members": "off",
    "@typescript-eslint/lines-between-class-members": "warn"
  }
};

Options​

See eslint/lines-between-class-members options.

In addition to the options supported by the lines-between-class-members rule in ESLint core, the rule adds the following options:

  • Object option:

    • "exceptAfterOverload": true (default) - Skip checking empty lines after overload class members
    • "exceptAfterOverload": false - do not skip checking empty lines after overload class members

  • See the other options allowed

exceptAfterOverload: true​

Examples of correct code for the { "exceptAfterOverload": true } option:

/*eslint @typescript-eslint/lines-between-class-members: ["error", "always", { "exceptAfterOverload": true }]*/

class foo {
  bar(a: string): void;
  bar(a: string, b: string): void;
  bar(a: string, b: string) {}

  baz() {}

  qux() {}
}

exceptAfterOverload: false​

Examples of correct code for the { "exceptAfterOverload": false } option:

/*eslint @typescript-eslint/lines-between-class-members: ["error", "always", { "exceptAfterOverload": false }]*/

class foo {
  bar(a: string): void;

  bar(a: string, b: string): void;

  bar(a: string, b: string) {}

  baz() {}

  qux() {}
}

Taken with ❤️ from ESLint core

Resources​