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Disallow the declaration of empty interfaces (no-empty-interface)

An empty interface is equivalent to its supertype. If the interface does not implement a supertype, then the interface is equivalent to an empty object ({}). In both cases it can be omitted.

Rule Details

This rule aims to ensure that only meaningful interfaces are declared in the code.

// an empty interface
interface Foo {}

// an interface with only one supertype (Bar === Foo)
interface Bar extends Foo {}

// an interface with an empty list of supertypes
interface Baz {}


This rule accepts a single object option with the following default configuration:

"@typescript-eslint/no-empty-interface": [
"allowSingleExtends": false
  • allowSingleExtends: true will silence warnings about extending a single interface without adding additional members

When Not To Use It

If you don't care about having empty/meaningless interfaces, then you will not need this rule.


  • โœ… Recommended
  • ๐Ÿ”ง Fixable
  • ๐Ÿ’ญ Requires type information