node.js - angular2 express session can't save -


i'm practising web service node.js express server , angular2 frontend. if run server webpack, runs on localhost:3000 , session saved correctly. development (due build time) case, if run application on localhost:8080 , communicate server (which on port 3000), can't save session. me this?

at first time, couldn't communicate between port 8080 , 3000 added below code inside server part.

   let allowcrossdomain = function(req, res, next) {         res.header('access-control-allow-origin', "*");         res.header('access-control-allow-methods', 'get,put,post,delete');         res.header('access-control-allow-headers', 'content-type');         next();     };     app.use(allowcrossdomain);

and session setting 

    app.use(session({         secret: 'sercret',         resave: false,         saveuninitialized: true     }));

thank time !


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