express js params

1app.get('/path/:name', function(req, res) { // url: /path/test
2  console.log(req.params.name);  // result: test
3});
4
5// OR
6
7app.get('/path', function(req, res) {  // url: /path?name='test'
8  console.log(req.query['name']);  // result: test
9});

1GET /something?color1=red&color2=blue
2
3app.get('/something', (req, res) => {
4    req.query.color1 === 'red'  // true
5    req.query.color2 === 'blue' // true
6})
7
8req.params refers to items with a ':' in the URL and req.query refers to items associated with the '?

1app.get('/path/:name', function(req, res) {
2  res.send("tagId is set to " + req.params.name);
3});

1app.get('/p/:tagId', function(req, res) {
2  res.send("tagId is set to " + req.params.tagId);
3});
4
5// GET /p/5
6// tagId is set to 5
7

1app.get('/users/:userId/books/:bookId', function (req, res) {
2  res.send(req.params)
3})
4

1Route path: /users/:userId/books/:bookId
2Request URL: http://localhost:3000/users/34/books/8989
3req.params: { "userId": "34", "bookId": "8989" }
4