isurl

Determine whether a value is a URL instance.

Works cross-realm/iframe and despite Symbol.toStringTag.

[!NOTE]

If you need to support older versions of Node.js (going back to 8.x), use 4.x of this package.

Install

npm install isurl

Usage

Strict

The standard.

import isURL from 'isurl';

isURL('http://domain/'); //-> false
isURL(new URL('http://domain/')); //-> true

Lenient

Acceptance can be extended to incomplete URL implementations that lack origin, searchParams and toJSON properties (which is common with web browsers from 2021):

import isURL from 'isurl/lenient';

console.log(url.searchParams); //-> undefined

isURL(url); //-> true