node.js - How to get a value from Jade to Javascript? -

i know looks repetitive, little bit different other question here.

i using node expressjs routing , passportjs login , in login page have dropdown list select value want pass along angular script.

in app.js have:

var languages = [    {"lang": "english", "code": "en"},    {"lang": "chinese", "code": "zh-cn"} ]; app.get('/', detectbrowser, routes.index); app.get('/login', routes.login(issamesubnet, languages)); 

index.js:

exports.index = function(req, res){    res.render('index', { login: 'some string' }); };  exports.login = function(language) {    return function(req, res) {        res.render('login', { lang: language });    }; }; 

login.jade:

label.control-label language select.form-control     each val, index in lang        option(value= val.code)= val.lang 

so how can grab value of option tag javascript , pass next stage (angularjs)?

i know how information exports.index on angular side, don't know how information want , use on index function.

thanks