URL

`URL.prototype.host`

Returns or sets the host portion of the URL including the port number if specified

Syntax

JavaScript

url.host

Return Value

A string containing the host (hostname:port)

Examples

Basic Usage

const url = new URL('https://example.com:8080/path')
console.log(url.host) // 'example.com:8080'

Practical Example

const url = new URL('https://example.com/path')
console.log(url.host) // 'example.com' (no port means default)

Advanced Usage

const url = new URL('http://localhost:3000/api')
url.host = 'localhost:8080'
console.log(url.href) // 'http://localhost:8080/api'

Understanding URL.prototype.host

The URL.prototype.host method in JavaScript returns or sets the host portion of the URL including the port number if specified. It belongs to the URL object and is one of the most widely used methods for working with url values in modern JavaScript and TypeScript applications.

The method signature is url.host. When called, it returns a string containing the host (hostname:port). Understanding when and how to use host() helps you write more expressive, readable code.

Common use cases for URL.prototype.host include data transformation, input validation, API response processing, and building reusable utility functions. It works well alongside related methods like url-hostname, url-port, url-origin, enabling you to chain operations together for complex data manipulation pipelines.

Browser support for URL.prototype.host is excellent across all modern browsers including Chrome, Firefox, Safari, and Edge. It is also fully supported in Node.js and Deno. For older environments, transpilation with Babel or a polyfill may be needed.