angular - How to create function that return promise from callback function

itemprop="text">

I use
javascript library that has
api.

libapi.callnetwork(arg1,callback(data){
//handle
            data
}

then
i create service function to call api like
this

myFunction():Promise{

            libapi.callnetwork(arg1,callback(data){
 return new
            Promise(resolve=>resolve(data));

            })
}

myFunction
will get error because it must return promise or declare as void. How can i create
function that return promise from this api?

class="post-text" itemprop="text">

class="normal">Answer

The idea
is not to create and return the promise from inside the callback, but to create it in
the outside function (where you can return it) and only
resolve the promise from the
callback:

myFunction():Promise{

            return new Promise(resolve => {
 libapi.callnetwork(arg1,
            callback(data){
 resolve(data);
 });

            });

}

or
simply

myFunction():Promise{

            return new Promise(resolve => {
 libapi.callnetwork(arg1,
            resolve);

            });
}