Getting a promise's value via yield & co

Question

I\'m trying to figure out how to get the value of a promise via yield, possibly with \"co\":

function *(){
    var someVar = yield functionThatR         


        

Answer 1

Yes, co can do that. You'll have to wrap parent function inside co call:

co(function *(){
    var someVar = yield functionThatReturnsAPromise();
})()

someVar inside will become resolved value. If promise gets rejected, error can be cought with basic try {} catch (e) {} statements.