Universal module definitions (UMD) are not supported

Rule arkts-no-umd

Severity: error

ArkTS does not support universal module definitions (UMD) because in the language there is no concept of "script" (as opposed to "module"). Besides, in ArkTS import is a compile-time, not a runtime feature. Use ordinary syntax for export and import instead.

TypeScript

    // math-lib.d.ts
    export const isPrime(x: number): boolean
    export as namespace mathLib

    // in script
    mathLib.isPrime(2)

ArkTS

    // math-lib.d.ts
    namespace mathLib {
        export isPrime(x: number): boolean
    }

    // in program
    import { mathLib } from "math-lib"
    mathLib.isPrime(2)

See also

• Recipe 129: Wildcards in module names are not supported (arkts-no-module-wildcards)