@ohos-rs/abort-controller 
AbortController for OpenHarmony based on emitter.
Required 
API Version >= 11
Install 
shell
ohpm install @ohos-rs/abort-controllerUsage 
ts
const controller = new AbortController();
asyncFib(20, controller.signal).catch((e: ESObject) => {
    console.error(e) // Error: AbortError
})
controller.abort()