[Javascript] promise-based functions should not throw exceptions

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You can also start a chain of then() method calls via and Promise.resolve() execute the synchronous code inside a callback:

    function Asyncfunc () {        return  promise.resolve ()        = {            Dosomethingsync ();             return Dosomethingasync ();        })         = {• •        });    }

An alternative are to start the Promise chain via the Promise constructor:

    function Asyncfunc () {        returnnew Promise ((Resolve, reject) + = {            Dosomethingsync ();            Resolve (Dosomethingasync ());        })         = {• •        });    }

This approach saves a tick (the synchronous code was executed right away), but it makes your code less regular.

[Javascript] promise-based functions should not throw exceptions