method

child_process.PromiseWithChild.then

then<TResult1 = T, TResult2 = never>(

onfulfilled?: null | (value: T) => TResult1 | PromiseLike<TResult1>,

onrejected?: null | (reason: any) => TResult2 | PromiseLike<TResult2>

): Promise<TResult1 | TResult2>;

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

@param onfulfilled

The callback to execute when the Promise is resolved.

@param onrejected

The callback to execute when the Promise is rejected.

@returns

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