CODEWITHSUNDEEP
javascriptnode.jssocket.ioscoping
Lytigas
Lytigas

Reputation: 944

A scope below the global scope in node.js

I'm new to JS, node, and scoping as a result. I've seen many people say to never use globals and others say to use them extremely sparingly. Basically, I have a function that declares/resets variables.

function resetStuff(){
    var foo = '';
    var bar = false;
    ...
}

and a socket.io handler. 

io.on('connection', function(socket){
    socket.on('event1', function (data){
        if (foo == 'bar') {
            doStuff()
        }
    });
});

To me it seems like I would have to move foo and bar to the global scope, but is there any way to give the socket.io events access to them without doing this?

Thanks!

Upvotes: 0

Views: 52

Answers (1)

lovespring
lovespring

Reputation: 440

no, node.js has a module scope. so, every variable outside the function just module scope, not Global. ( not like js in client browser, where every variable not in a function will be in Global scope)

so, you could:

var foo,bar;

io.on ....

and also, you could define a unamed scope by using unnamed function:

(function(){
    var foo,bar;

    io.on ....
})();

Upvotes: 1

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