1# Use ``class`` instead of a type with constructor signature 2 3Rule ``arkts-no-ctor-signatures-type`` 4 5**Severity: error** 6 7ArkTS does not support constructor signatures in object types. Use classes 8instead. 9 10 11## TypeScript 12 13 14``` 15 16 class SomeObject {} 17 18 type SomeConstructor = { 19 new (s: string): SomeObject 20 } 21 22 function fn(ctor: SomeConstructor) { 23 return new ctor("hello") 24 } 25 26``` 27 28## ArkTS 29 30 31``` 32 33 class SomeObject { 34 public f: string 35 constructor (s: string) { 36 this.f = s 37 } 38 } 39 40 function fn(s: string): SomeObject { 41 return new SomeObject(s) 42 } 43 44``` 45 46## See also 47 48- Recipe 014: Use ``class`` instead of a type with call signature (``arkts-no-call-signatures``) 49 50 51