Special Schemes of Node.js URL.protocol API

Last Updated : 14 Oct, 2021

The url.protocol is an inbuilt application programming interface of class URL within URL module which is used to get and set the protocol scheme of the URL.

Syntax:

const url.protocol

Return value: It get and set protocol scheme of the URL

Example 1: This example changes the special protocols to hypothetical protocols like http->https.

JavaScript

// Node program to demonstrate the  
// url.protocol API as Setter  
// Changing of protocols to special
// protocols like http->https
    
// Importing the module 'url' 
const http = require('url'); 
    
// Creating and initializing myURL 
const myURL = new URL('http://gfg.org/foo'); 
    
// Display href value of myURL before change 
console.log("Before Change"); 

console.log(myURL.href); 
    
// Assigning protocol portion 
// using protocol 
console.log(); 
myURL.protocol = 'https'; 
    
// Display href value of myURL after change 
console.log("After Change"); 
console.log(myURL.href);

Output:

Before Change
http://gfg.org/foo

After Change
https://gfg.org/foo

Example 2: This example try changes the non-special protocol to a special protocol like smtp->http but it will not change.

JavaScript

// Node program to demonstrate the  
// url.protocol API as Setter  
// Changing the protocols to special 
// protocols like smtp->http
     
// Importing the module 'url' 
const http = require('url'); 
     
// Creating and initializing myURL 
const myURL = new URL('smtp://gfg.org/foo'); 
     
// Display href value of myURL before change 
console.log("Before Change"); 
console.log(myURL.href); 
     
// Assigning protocol portion 
// using protocol 
console.log(); 
myURL.protocol = 'http'; 
     
// Display href value of myURL after change 
console.log("After Change"); 
console.log(myURL.href);

Output:

Before Change
smtp://gfg.org/foo

After Change
smtp://gfg.org/foo

Example 3: This example try to change the special protocols to hypothetical protocols like ftp->fish but it will not change.

JavaScript

// Node program to demonstrate the  
// url.protocol API as Setter  
// Changing of protocols to special
// protocols like ftp->fish
     
// Importing the module 'url' 
const http = require('url'); 
     
// Creating and initializing myURL 
const myURL = new URL('ftp://gfg.org/foo'); 
     
// Display href value of myURL before change 
console.log("Before Change"); 
console.log(myURL.href); 
     
// Assigning protocol portion 
// using protocol 
console.log(); 
myURL.protocol = 'fish'; 
     
// Display href value of myURL after change 
console.log("After Change"); 
console.log(myURL.href);

Output:

Before Change
ftp://gfg.org/foo

After Change
ftp://gfg.org/foo

Example 4: This example try to change from non-special protocols to hypothetical protocols like ssh->fish.

JavaScript

// Node program to demonstrate the  
// url.protocol API as Setter  
// Changing the protocols to special
// protocols like ssh->fish
     
// Importing the module 'url' 
const http = require('url'); 
     
// Creating and initializing myURL 
const myURL = new URL('ssh://gfg.org/foo'); 
     
// Display href value of myURL before change 
console.log("Before Change"); 
console.log(myURL.href); 
     
// Assigning protocol portion 
// using protocol 
console.log(); 
myURL.protocol = 'fish'; 
     
// Display href value of myURL after change 
console.log("After Change"); 
console.log(myURL.href);

Output:

Before Change
ssh://gfg.org/foo

After Change
fish://gfg.org/foo

Example 5: It can be used as a getter.

JavaScript

// Node program to demonstrate the 
// url.pathname API as Getter 
 
// Importing the module 'url' 
const http = require('url'); 
 
// Creating and initializing myURL 
const myURL = new URL('https://gfg.org/foo'); 
 
// Getting the path portion 
// using pathname 
const protocol = myURL.protocol; 
 
// Display path value 
console.log(protocol);