#no-unsafe-return

#Configuration

import { defineConfig, ts } from '@rslint/core';

export default defineConfig([
  ts.configs.recommended,
  {
    rules: {
      '@typescript-eslint/no-unsafe-return': 'error',
    },
  },
]);

#Rule Details

Disallow returning a value with type any from a function.

Returning an any-typed value from a function that has a typed return type undermines type safety, since the caller will trust the return type but the actual value has no type guarantees. This rule also flags returning any[] and Promise<any> where the function expects more specific types.

Examples of incorrect code for this rule:

function foo(): string {
  return 1 as any;
}

function bar(): string[] {
  return [] as any[];
}

const fn = (): Set<string> => new Set<any>();

Examples of correct code for this rule:

function foo(): string {
  return 'hello';
}

function bar(): unknown {
  return 1 as any; // returning any to unknown is allowed
}

function baz(): any {
  return 1 as any; // explicit any return type is allowed
}

#Original Documentation

• typescript-eslint no-unsafe-return