URL: port property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨September 2016⁩.

Note: This feature is available in Web Workers.

The port property of the URL interface is a string containing the port number of the URL. If the port is the default for the protocol (80 for ws: and http:, 443 for wss: and https:, and 21 for ftp:), this property contains an empty string, "".

This property can be set to change the port of the URL. If the URL has no host or its scheme is file:, then setting this property has no effect. It also silently ignores invalid port numbers.

Value

A string.

Examples

// https protocol with non-default port number
new URL("https://example.com:5443/svn/Repos/").port; // '5443'
// http protocol with non-default port number
new URL("http://example.com:8080/svn/Repos/").port; // '8080'
// https protocol with default port number
new URL("https://example.com:443/svn/Repos/").port; // '' (empty string)
// http protocol with default port number
new URL("http://example.com:80/svn/Repos/").port; // '' (empty string)
// https protocol with no explicit port number
new URL("https://example.com/svn/Repos/").port; // '' (empty string)
// http protocol with no explicit port number
new URL("http://example.com/svn/Repos/").port; // '' (empty string)
// ftp protocol with non-default port number
new URL("ftp://example.com:221/svn/Repos/").port; // '221'
// ftp protocol with default port number
new URL("ftp://example.com:21/svn/Repos/").port; // '' (empty string)