13af6ab5fSopenharmony_ci# Construct signatures are not supported in interfaces 23af6ab5fSopenharmony_ci 33af6ab5fSopenharmony_ciRule ``arkts-no-ctor-signatures-iface`` 43af6ab5fSopenharmony_ci 53af6ab5fSopenharmony_ci**Severity: error** 63af6ab5fSopenharmony_ci 73af6ab5fSopenharmony_ciArkTS does not support construct signatures. Use methods instead. 83af6ab5fSopenharmony_ci 93af6ab5fSopenharmony_ci 103af6ab5fSopenharmony_ci## TypeScript 113af6ab5fSopenharmony_ci 123af6ab5fSopenharmony_ci 133af6ab5fSopenharmony_ci``` 143af6ab5fSopenharmony_ci 153af6ab5fSopenharmony_ci interface I { 163af6ab5fSopenharmony_ci new (s: string): I 173af6ab5fSopenharmony_ci } 183af6ab5fSopenharmony_ci 193af6ab5fSopenharmony_ci function fn(i: I) { 203af6ab5fSopenharmony_ci return new i("hello") 213af6ab5fSopenharmony_ci } 223af6ab5fSopenharmony_ci 233af6ab5fSopenharmony_ci``` 243af6ab5fSopenharmony_ci 253af6ab5fSopenharmony_ci## ArkTS 263af6ab5fSopenharmony_ci 273af6ab5fSopenharmony_ci 283af6ab5fSopenharmony_ci``` 293af6ab5fSopenharmony_ci 303af6ab5fSopenharmony_ci interface I { 313af6ab5fSopenharmony_ci create(s: string): I 323af6ab5fSopenharmony_ci } 333af6ab5fSopenharmony_ci 343af6ab5fSopenharmony_ci function fn(i: I) { 353af6ab5fSopenharmony_ci return i.create("hello") 363af6ab5fSopenharmony_ci } 373af6ab5fSopenharmony_ci 383af6ab5fSopenharmony_ci``` 393af6ab5fSopenharmony_ci 403af6ab5fSopenharmony_ci## See also 413af6ab5fSopenharmony_ci 423af6ab5fSopenharmony_ci- Recipe 015: Use ``class`` instead of a type with constructor signature (``arkts-no-ctor-signatures-type``) 433af6ab5fSopenharmony_ci 443af6ab5fSopenharmony_ci 45