how to get ip address and port from url in javascript

How to Get IP Address and Port from URL in JavaScript

As a web developer, it's important to know how to extract the IP address and port number from a URL using JavaScript. This can come in handy when working with network-based applications, server-side programming, or debugging network issues.

Method 1: Using Regular Expressions

One way to extract the IP address and port number from a URL is by using regular expressions. Here's the code:

const url = "http://192.168.1.10:8080";
const regex = /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}):(\d+)/;
const match = url.match(regex);
const ip = match[1];
const port = match[2];

console.log(ip); // "192.168.1.10"
console.log(port); // "8080"

In this code, we first define the URL that we want to extract the IP address and port number from. We then create a regular expression pattern that matches an IP address and a port number. The regular expression looks for any combination of 1-3 digits followed by a period, repeated four times (for the IP address), followed by a colon, and then any number of digits (for the port number).

We then use the match() method to search the URL for a match to our regular expression pattern. This method returns an array containing the matched substring (in this case, the IP address and port number). We then extract the IP address and port number by accessing the first and second elements of the array, respectively.

Method 2: Using the URL API

Another way to extract the IP address and port number from a URL is by using the built-in URL API in JavaScript. Here's the code:

const url = new URL("http://192.168.1.10:8080");
const ip = url.hostname;
const port = url.port;

console.log(ip); // "192.168.1.10"
console.log(port); // "8080"

In this code, we create a new URL object and pass in the URL string that we want to extract the IP address and port number from. We can then access the IP address and port number directly from the hostname and port properties of the URL object, respectively.

Both of these methods are effective for extracting the IP address and port number from a URL in JavaScript. Depending on your needs, one method may be more suitable than the other. Experiment with both methods and see which one works best for you!