Node.js URL.protocol API
The url.protocol is an inbuilt application programming interface of class URL within url module which is used to get and set the protocol portion of the URL. When a URL is parsed using one of the special protocols, the url.protocol property may be changed to another special protocol but cannot be changed to a non-special protocol, and vice versa.
Syntax:
const url.protocol
Return value: It returns the protocol portion of the URL.
Below examples illustrate the use of url.protocol method in Node.js:
Example 1:
// Node program to demonstrate the
// url.protocol API as Setter
// Importing the module 'url'
const http = require('url');
// Creating and initializing myURL
const myURL = new URL('https://geeksforgeeks.org:80/foo#ram');
// 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 https://geeksforgeeks.org:80/foo#ram After Change http://geeksforgeeks.org/foo#ram
Example 2: This example changes the special protocol to a non-special protocol.
// Node program to demonstrate the
// url.protocol API as Setter
// Importing the module 'url'
const http = require('url');
// Creating and initializing myURL
const myURL = new URL('https://geeksforgeeks.org:80/foo#ram');
// Display href value of myURL before change
console.log("Before Change");
console.log(myURL.href);
// Assigning protocol portion
// with non special protocol
// using protocol
console.log();
myURL.protocol = 'xyz';
// Display href value of myURL after change
console.log("After Change");
console.log(myURL.href);
Output:
Before Change https://geeksforgeeks.org:80/foo#ram After Change https://geeksforgeeks.org:80/foo#ram
Example 3:
// Node program to demonstrate the
// url.protocol API as Getter
// Importing the module 'url'
const http = require('url');
// Creating and initializing myURL
const myURL = new URL('https://geeksforgeeks.org:80/foo#ram');
// Getting the protocol portion
// using protocol
const protocol = myURL.protocol;
// Display hash value
console.log("Protocol of current url is : " + protocol);
Output:
Protocol of current url is : https:
Note: The above program will compile and run by using the node myapp.js command.
Reference: https://nodejs.org/api/url.html#url_url_protocol
