#no-non-null-asserted-optional-chain

#Configuration

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

export default defineConfig([
  ts.configs.recommended,
  {
    rules: {
      '@typescript-eslint/no-non-null-asserted-optional-chain': 'error',
    },
  },
]);

#Rule Details

Disallow non-null assertions after an optional chain expression.

Optional chain expressions (?.) are designed to return undefined if the value is nullish. Using a non-null assertion (!) after an optional chain expression is unsafe, as it defeats the purpose of the optional chain.

Examples of incorrect code for this rule:

foo?.bar!;
foo?.bar()!;

Examples of correct code for this rule:

foo?.bar;
foo?.bar();

#Original Documentation

https://typescript-eslint.io/rules/no-non-null-asserted-optional-chain