Resolve URL pathnames using JavaScript

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3.0.04 years ago6 years agoMinified + gzip package size for resolve-pathname in KB


resolve-pathname resolves URL pathnames identical to the way browsers resolve the pathname of an <a href> value. The goals are:
  • 100% compatibility with browser pathname resolution
  • Pure JavaScript implementation (no DOM dependency)


Using npm:
$ npm install --save resolve-pathname
Then, use as you would anything else:
// using ES6 modules
import resolvePathname from 'resolve-pathname';

// using CommonJS modules
var resolvePathname = require('resolve-pathname');

The UMD build is also available on unpkg:
<script src=""></script>

You can find the library on window.resolvePathname.


import resolvePathname from 'resolve-pathname';

// Simply pass the pathname you'd like to resolve. Second
// argument is the path we're coming from, or the current
// pathname. It defaults to "/".
resolvePathname('about', '/company/jobs'); // /company/about
resolvePathname('../jobs', '/company/team/ceo'); // /company/jobs
resolvePathname('about'); // /about
resolvePathname('/about'); // /about

// Index paths (with a trailing slash) are also supported and
// work the same way as browsers.
resolvePathname('about', '/company/info/'); // /company/info/about

// In browsers, it's easy to resolve a URL pathname relative to
// the current page. Just use window.location! e.g. if
// window.location.pathname == '/company/team/ceo' then
resolvePathname('cto', window.location.pathname); // /company/team/cto
resolvePathname('../jobs', window.location.pathname); // /company/jobs

Prior Work

  • url.resolve - node's url.resolve implementation for full URLs
  • resolve-url - A DOM-dependent implementation of the same algorithm