The nodejs implementation gets the current url address and various url parameter values

// The modules you need to use  http   url

 The current url   http://localhost:8888/select?aa=001&bb=002

var http = require('http');

var URL = require('url');

http.createServer(function(req, res){

   var arg = url.parse(req.url).query;  // methods 1arg => aa=001&bb=002

   var arg = url.parse(req.url, true).query;  // methods 2arg => { aa: '001', bb: '002' }

   console.log(arg.aa);// return 001

   console.log(arg.bb);// return 002

   // Then you can process the data as you get it 
}).listen(8888);// Set up the server and listen on the port 

Gets the value of the specific url parameter

var testUrl =  'http://localhost:8888/select?aa=001&bb=002';

var p = URL.parse(testUrl); 

console.log(p.href); // The value obtained is: http://localhost:8888/select?aa=001&bb=002

console.log(p.protocol); // The value obtained is: http: 

console.log( p.hostname);// The value obtained is: locahost

console.log(p.host);// The value obtained is: localhost:8888

console.log(p.port);// The value obtained is: 8888

console.log(p.path);// The value obtained is: /select?aa=001&bb=002

console.log(p.hash);// The value obtained is: null 

console.log(p.query);//  The value obtained is: aa=001

It is worth noting here that when the statement is var p = URL.parse (testUrl, true), p.query returns an object such as {aa:'001'} and print p.query [object]. The value obtained is: 001
console. log (p. pathname); // The value obtained is: /select

The method of getting js is attached below:
The current URL

http://mj_0203.0fees.net/index.php?aa=001&bb=002

document.location:        http://mj_0203.0fees.net/index.php?aa=001&bb=002

document.URL:             http://mj_0203.0fees.net/index.php?aa=001&bb=002

document.location.href:   http://mj_0203.0fees.net/index.php?aa=001&bb=002

self.location.href:       http://mj_0203.0fees.net/index.php?aa=001&bb=002

top.location.href:        http://mj_0203.0fees.net/index.php?aa=001&bb=002

parent.document.location: http://mj_0203.0fees.net/index.php?aa=001&bb=002

top.location.hostname:    mj_0203.0fees.net

location.hostname:        mj_0203.0fees.net