javascript - How to return promise up the chain after recursion -

i making request returns paged data, want call function recursively until have of pages of data, so:

router.get("/", (req, res) => {     dorequest(1, [])         .then(result => {             res.status(200).send(result);         })         .catch(error => {             console.error(error);             res.status(500).send("error request");         }); });  function dorequest(page, list){     let options = {         uri : "www.example.com",         qs : { "page" : page }     };     request(options)         .then((results) => {             list.push(results);             if(page === 2){                 return promise.resolve(list);             } else {                 return dorequest(++page, list);             }         })         .catch((error) => {             return promise.reject(error);         }); } 

my route returning cannot read property 'then' of undefined, dorequest() apparently returning undefined right away, rather returning list when ready. i'm new promises i'm sure i'm missing pretty simple.

change dorequest function to

function dorequest(page, list){     let options = {         uri : "www.example.com",         qs : { "page" : page }     };     return request(options)         .then((results) => {             list.push(results);             if(page === 2){                 return promise.resolve(list);             } else {                 return dorequest(++page, list);             }         })         .catch((error) => {             return promise.reject(error);         }); } 

so can return request, returns nothing (undefined)