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no-empty-function

Disallow empty functions.

Rule Details​

This rule extends the base eslint/no-empty-function rule. It adds support for handling TypeScript specific code that would otherwise trigger the rule.

One example of valid TypeScript specific code that would otherwise trigger the no-empty-function rule is the use of parameter properties in constructor functions.

How to Use​

{
  // note you must disable the base rule as it can report incorrect errors
  "no-empty-function": "off",
  "@typescript-eslint/no-empty-function": ["error"]
}

Options​

See eslint/no-empty-function options. This rule adds the following options:

type AdditionalAllowOptionEntries =
  | 'private-constructors'
  | 'protected-constructors'
  | 'decoratedFunctions'
  | 'overrideMethods';

type AllowOptionEntries =
  | BaseNoEmptyFunctionAllowOptionEntries
  | AdditionalAllowOptionEntries;

interface Options extends BaseNoEmptyFunctionOptions {
  allow?: Array<AllowOptionEntries>;
}
const defaultOptions: Options = {
  ...baseNoEmptyFunctionDefaultOptions,
  allow: [],
};

allow: private-constructors​

Examples of correct code for the { "allow": ["private-constructors"] } option:

class Foo {
  private constructor() {}
}

allow: protected-constructors​

Examples of correct code for the { "allow": ["protected-constructors"] } option:

class Foo {
  protected constructor() {}
}

allow: decoratedFunctions​

Examples of correct code for the { "allow": ["decoratedFunctions"] } option:

@decorator()
function foo() {}

class Foo {
  @decorator()
  foo() {}
}

allow: overrideMethods​

Examples of correct code for the { "allow": ["overrideMethods"] } option:

abstract class Base {
  protected greet(): void {
    console.log('Hello!');
  }
}

class Foo extends Base {
  protected override greet(): void {}
}

How to Use​

{
  // note you must disable the base rule as it can report incorrect errors
  "no-empty-function": "off",
  "@typescript-eslint/no-empty-function": ["error"]
}

Taken with ❤️ from ESLint core

Attributes​

  • Configs:
    • ✅ Recommended
    • 🔒 Strict
  • 🔧 Fixable
  • 💭 Requires type information