CODEWITHSUNDEEP
node.jsexpressroutes
Fluffy
Fluffy

Reputation: 28402

Express, how to make a route handle empty parameter?

How do I specify a route with a parameter that can be empty?

e.g. /:one?/:two? handles /1/2, but does not handle //2, how do I a make a route to catch both the uris?

Upvotes: 4

Views: 4198

Answers (2)

Johan Davidsson
Johan Davidsson

Reputation: 21

Long time since the question was asked, but I had the same problem and found a different solution using named parameters:

app.get('/:one(.{0,})/:two(.{0,})', (req, res) => {
  const one = req.params.one;
  const two = req.params.two;
});

Inside the paranthesis there is a regex specification of the named parameter. Note the comment in the Express documentation:

In Express 4.x, the * character in regular expressions is not interpreted in the usual way. As a workaround, use {0,} instead of *. This will likely be fixed in Express 5.

Upvotes: 2

laggingreflex
laggingreflex

Reputation: 34687

app.get(/\/(.*)\/(.*)/, function(req, res) {
    var one = req.params[0];
    var two = req.params[1];
});

/a/b => {0:'a', 1:'b'}
/a/  => {0:'a', 1:'' }
//b  => {0:'' , 1:'b'}
//   => {0:'' , 1:'' }

Upvotes: 3

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