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:
Javascript
// 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://w3wiki.net: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://w3wiki.net:80/foo#ram After Change http://w3wiki.net/foo#ram
Example 2: This example changes the special protocol to a non-special protocol.
Javascript
// 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://w3wiki.net: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://w3wiki.net:80/foo#ram After Change https://w3wiki.net:80/foo#ram
Example 3:
Javascript
// 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://w3wiki.net: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