module.exports={parser:"@typescript-eslint/parser",parserOptions:{project:"tsconfig.json",},plugins:["@typescript-eslint"],rules:{"@typescript-eslint/no-unnecessary-type-assertion":"error",}};

declarefunctionfoo(str?:string):void;declareconststr:string|null;foo(str!);

D:\Projects\typescript-eslint-no-unnecessary-type-assertion-undefined\index.ts  4:5  error  This assertion is unnecessary since the receiver accepts the original type of the expression  @typescript-eslint/no-unnecessary-type-assertion✖ 1 problem (1 error, 0 warnings)  1 error and 0 warnings potentially fixable with the `--fix` option.