How to access the GET parameters after "?" in Express?
So, after checking out the express reference, I found that req.query.color
would return me the value I'm looking for.
req.params refers to items with a ':' in the URL and req.query refers to items associated with the '?'
Example:
GET /something?color1=red&color2=blue
Then in express, the handler:
app.get('/something', (req, res) => { req.query.color1 === 'red' // true req.query.color2 === 'blue' // true})
Use req.query, for getting he value in query string parameter in the route.Refer req.query.Say if in a route, http://localhost:3000/?name=satyam you want to get value for name parameter, then your 'Get' route handler will go like this :-
app.get('/', function(req, res){ console.log(req.query.name); res.send('Response send to client::'+req.query.name);});
Update: req.param()
is now deprecated, so going forward do not use this answer.
Your answer is the preferred way to do it, however I thought I'd point out that you can also access url, post, and route parameters all with req.param(parameterName, defaultValue)
.
In your case:
var color = req.param('color');
From the express guide:
lookup is performed in the following order:
- req.params
- req.body
- req.query
Note the guide does state the following:
Direct access to req.body, req.params, and req.query should be favoured for clarity - unless you truly accept input from each object.
However in practice I've actually found req.param()
to be clear enough and makes certain types of refactoring easier.