How to exit a route in express.js?

Question

Right know i wrap it whole in a big if else statement because i have multiple res.render functions.

How can i do something like this, which should prevent the rest of the route to be executed:

if(req.params.url === undefined){
    res.render('layout');
    return;
}

OR:

if(req.params.url === undefined){
    res.render('layout');
    next();
}

But both of the execute the rest of the code below them, which cause Headers already sent.

Right now my code looks like this:

exports.activate = function(req, res){
    var hash = req.params.hash;

    if(hash === undefined){
        res.render('activation');
        next();
    } else {
           // Do stuff with hash
           res.render('activateOne', {hash: hash});
    }

}

Answer 1

I'm not 100% sure of this, but if you just want to exit the function after your res.render() I think you can use return. This should prevent the rest of your current function from executing.

A simple AJAX example (I know its client side, but its an async function and should behave similar):

$.ajax({
   url: 'www.google.com',
   type: 'POST',
   error: function () {
      console.log('failure');
      return 0;
      console.log('after return');
   }
})

If you try to execute this in your browsers console, you will note the 'failure' log, however it will stop before the 'after return' message.