Readonly [toStringTag]

catch

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

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

  Type Parameters

  • TResult = never

  Parameters

  • Optional onrejected: null | ((reason) => TResult | PromiseLike<TResult>)

    The callback to execute when the Promise is rejected.

  Returns Promise<T | TResult>

  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

  • Optional onfulfilled: null | ((value) => TResult1 | PromiseLike<TResult1>)

    The callback to execute when the Promise is resolved.

  • Optional onrejected: null | ((reason) => TResult2 | PromiseLike<TResult2>)

    The callback to execute when the Promise is rejected.

  Returns Promise<TResult1 | TResult2>

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