13af6ab5fSopenharmony_ci# Indexed access types are not supported 23af6ab5fSopenharmony_ci 33af6ab5fSopenharmony_ciRule ``arkts-no-aliases-by-index`` 43af6ab5fSopenharmony_ci 53af6ab5fSopenharmony_ci**Severity: error** 63af6ab5fSopenharmony_ci 73af6ab5fSopenharmony_ciArkTS does not support indexed access types. Use the type name instead. 83af6ab5fSopenharmony_ci 93af6ab5fSopenharmony_ci 103af6ab5fSopenharmony_ci## TypeScript 113af6ab5fSopenharmony_ci 123af6ab5fSopenharmony_ci 133af6ab5fSopenharmony_ci``` 143af6ab5fSopenharmony_ci 153af6ab5fSopenharmony_ci type Point = {x: number, y: number} 163af6ab5fSopenharmony_ci type N = Point["x"] // is equal to number 173af6ab5fSopenharmony_ci 183af6ab5fSopenharmony_ci``` 193af6ab5fSopenharmony_ci 203af6ab5fSopenharmony_ci## ArkTS 213af6ab5fSopenharmony_ci 223af6ab5fSopenharmony_ci 233af6ab5fSopenharmony_ci``` 243af6ab5fSopenharmony_ci 253af6ab5fSopenharmony_ci class Point {x: number = 0; y: number = 0} 263af6ab5fSopenharmony_ci type N = number 273af6ab5fSopenharmony_ci 283af6ab5fSopenharmony_ci``` 293af6ab5fSopenharmony_ci 303af6ab5fSopenharmony_ci 31