How to get this kind of parameter in node.js express router?

I have a router like this:

app.get('/blog/:id/delete', function (req, res) {

})

how can I get the :id parameter?

I have tried req.query.id req.param.id ,but both failed

How can I get the correct id value?

It's req.params.id.

So, basically you were nearly right, just an s was missing ;-)