Req Params

This property is an array containing properties mapped to the named route "parameters". For example if you have the route /user/:name, then the "name" property is available to you as req.params.name. This object defaults to {}.

// GET /user/tj
console.dir(req.params.name)
// => 'tj'

When a regular expression is used for the route definition, capture groups are provided in the array using req.params[N], where N is the nth capture group. This rule is applied to unnamed wild-card matches with string routes such as /file/*:

// GET /file/javascripts/jquery.js
console.dir(req.params[0])
// => 'javascripts/jquery.js'