Using a function type is suggested instead of an interface or object type literal with a single call signature.

Bad Practice

// Example 1
interface Foo {
  (): string;
}

// Example 2
function foo(bar: { (): number }): number {
  return bar();
}

// Example 3
interface Foo extends Function {
  (): void;
}

Recommended

// Example 1
interface Foo {
  (): void;
  bar: number;
}

// Example 2
function foo(bar: { (): string; baz: number }): string {
  return bar();
}

// Example 3
interface Foo {
  bar: string;
}
interface Bar extends Foo {
  (): void;
}

CIDARLAB / 3DuF

No ignore rules found