declareleta:string|null|undefined;declareletb:string|null|undefined;a/* a */!==/* b */undefined/* c */&&/* d */a/* e */!==/* f */null/* g */  ?/* h */a/* i */  :/* j */b

{"rules":{"@typescript-eslint/prefer-nullish-coalescing":"error"}}

{"compilerOptions": {"strictNullChecks":true  }}

declareleta:string|null|undefined;declareletb:string|null|undefined;a/* a *//* b *//* c *//* d *//* e *//* f* / /* g *//* h *//* i */??/* j */b

declareleta:string|null|undefined;declareletb:string|null|undefined;a??b