Class LazyPromise<T>

constructor

• new LazyPromise<T>(executor): LazyPromise<T>

• LazyPromise, execute async operation when user await it.

  Type Parameters

  • T = any

  Parameters

  • executor: PromiseExecutor<T>

    Promise executor

  Returns LazyPromise<T>

[toStringTag]

catch

• catch<TResult>(onrejected?): Promise<T | TResult>

• Attaches a callback for only the rejection of the Promise.

  Type Parameters

  • TResult = never

  Parameters

  • Optionalonrejected: ((reason: any) => TResult | PromiseLike<TResult>)

    The callback to execute when the Promise is rejected.

    • • (reason): TResult | PromiseLike<TResult>

      • Parameters

        • reason: any

        Returns TResult | PromiseLike<TResult>

  Returns Promise<T | TResult>

  A Promise for the completion of the callback.

finally

• finally(onfinally?): Promise<T>

• Attaches a callback that is invoked when the Promise is settled (fulfilled or rejected). The resolved value cannot be modified from the callback.

  Parameters

  • Optionalonfinally: (() => void)

    The callback to execute when the Promise is settled (fulfilled or rejected).

    • • (): void

      • Returns void

  Returns Promise<T>

  A Promise for the completion of the callback.

then

• then<TResult1, TResult2>(onfulfilled?, onrejected?): Promise<TResult1 | TResult2>

• Attaches callbacks for the resolution and/or rejection of the Promise.

  Type Parameters

  • TResult1 = T
  • TResult2 = never

  Parameters

  • Optionalonfulfilled: ((value: T) => TResult1 | PromiseLike<TResult1>)

    The callback to execute when the Promise is resolved.

    • • (value): TResult1 | PromiseLike<TResult1>

      • Parameters

        • value: T

        Returns TResult1 | PromiseLike<TResult1>

  • Optionalonrejected: ((reason: any) => TResult2 | PromiseLike<TResult2>)

    The callback to execute when the Promise is rejected.

    • • (reason): TResult2 | PromiseLike<TResult2>

      • Parameters

        • reason: any

        Returns TResult2 | PromiseLike<TResult2>

  Returns Promise<TResult1 | TResult2>

  A Promise for the completion of which ever callback is executed.