express js params
app.get('/path/:name', function(req, res) { // url: /path/test
console.log(req.params.name); // result: test
});
// OR
app.get('/path', function(req, res) { // url: /path?name='test'
console.log(req.query['name']); // result: test
});express js example
//to run : node filename.js
const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => res.send('Hello World!'))
app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))
//visit localhost:3000
// assuming you have done 1) npm init 2) npm install expressexpress get params after ?
GET /something?color1=red&color2=blue
app.get('/something', (req, res) => {
req.query.color1 === 'red' // true
req.query.color2 === 'blue' // true
})
req.params refers to items with a ':' in the URL and req.query refers to items associated with the '?express get url parameters
app.get('/path/:name', function(req, res) {
res.send("tagId is set to " + req.params.name);
});difference between req.query and req.params
req.params contains route parameters
(in the path portion of the URL),
and req.query contains the URL query parameters
(after the ? in the URL).
You can also use req.param(name) to look up a parameter in both places
(as well as req.body),
but this method is now deprecated.req.params
params. An object containing parameter values parsed from the URL path. For example if you have the route /user/:name , then the "name" from the URL path wil be available as req.params.name .Copyright © 2021 Codeinu
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