13af6ab5fSopenharmony_ci# Type annotation in catch clause is not supported 23af6ab5fSopenharmony_ci 33af6ab5fSopenharmony_ciRule ``arkts-no-types-in-catch`` 43af6ab5fSopenharmony_ci 53af6ab5fSopenharmony_ci**Severity: error** 63af6ab5fSopenharmony_ci 73af6ab5fSopenharmony_ciIn TypeScript, catch clause variable type annotation must be ``any`` or ``unknown`` 83af6ab5fSopenharmony_ciif specified. As ArkTS does not support these types, omit type annotations. 93af6ab5fSopenharmony_ci 103af6ab5fSopenharmony_ci 113af6ab5fSopenharmony_ci## TypeScript 123af6ab5fSopenharmony_ci 133af6ab5fSopenharmony_ci 143af6ab5fSopenharmony_ci``` 153af6ab5fSopenharmony_ci 163af6ab5fSopenharmony_ci try { 173af6ab5fSopenharmony_ci // some code 183af6ab5fSopenharmony_ci } 193af6ab5fSopenharmony_ci catch (a: unknown) { 203af6ab5fSopenharmony_ci // handle error 213af6ab5fSopenharmony_ci } 223af6ab5fSopenharmony_ci 233af6ab5fSopenharmony_ci``` 243af6ab5fSopenharmony_ci 253af6ab5fSopenharmony_ci## ArkTS 263af6ab5fSopenharmony_ci 273af6ab5fSopenharmony_ci 283af6ab5fSopenharmony_ci``` 293af6ab5fSopenharmony_ci 303af6ab5fSopenharmony_ci try { 313af6ab5fSopenharmony_ci // some code 323af6ab5fSopenharmony_ci } 333af6ab5fSopenharmony_ci catch (a) { 343af6ab5fSopenharmony_ci // handle error 353af6ab5fSopenharmony_ci } 363af6ab5fSopenharmony_ci 373af6ab5fSopenharmony_ci``` 383af6ab5fSopenharmony_ci 393af6ab5fSopenharmony_ci## See also 403af6ab5fSopenharmony_ci 413af6ab5fSopenharmony_ci- Recipe 087: ``throw`` statements cannot accept values of arbitrary types (``arkts-limited-throw``) 423af6ab5fSopenharmony_ci 433af6ab5fSopenharmony_ci 44