Interface Chain

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catch

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

  A Promise for the completion of the callback.

finally

• finally(onfinally?): Promise<Response>

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

  Parameters

  • Optional onfinally: null | (() => void)

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

  Returns Promise<Response>

  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 = Response
  • 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.