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urlz

v0.7.0

Published

Functional utils for URLs

Downloads

39

Readme

Urlz

Functional toolkit for URLs. Drop-in url and querystring replacement. Originally built for a static site generator where URL transformations are common, but use-cases are really unlimited.

Features

  • High-level URL manipulations
  • Curried composable API
  • Crossplatform: works in NodeJS and all modern browsers
  • Extensive test suite

Dependencies:

Peer dependencies:

Usage

$ npm install urlz
let U = require("urlz")

// The following snippets also use shortcuts for:
let R = require("ramdax")
let UU = require("url")

Glossary

  1. http://foo.com/bar/baz – absolute URL
  2. foo.com/bar/baz – invalid URL, may occur in human text (*)
  3. /bar/baz – root-relative URL (not absolute!)
  4. bar/baz – relative URL
  • – should be specially handled with libs like normalize-url. We don't provide normalization heuristics here (yet).

Motivation

1. Original format / parse provide limited, low-level, mutable API

There is also newer WHATWG URL API but it doesn't support relative URLs. Which basically makes it unusable for many scenarios. So while NodeJS renders url as deprecated it's still much better than WHATWG version (unsurprisingly).

2. urlz is trailing slash aware

Trailing slash is significant in some cases. It may affect backend routing AND it affects relative URLs:

urlz doesn't assume anything and keeps trailing slash untouched for all operations where it's possible.

3. urlz respects "relativeness" and "absoluteness" of urls

console.log(U.addLeftDir("bar", "/foo.txt"))  // "/bar/foo.txt" (+)
console.log(UU.join("bar", "/foo.txt"))       // "bar/foo.txt"  (-) naive

console.log(U.addRightDir("bar", "/foo.txt")) // "/bar/foo.txt" (+)
console.log(UU.join("/foo.txt", "bar"))       // "/foo.txt/bar" (-) naive

4. urlz is composition friendly

let R = require("ramdax")

let src = "content/team/about.md"
let dst = R.pipe(
  U.withLeftDir("public"),
  U.addRightDir(P.name(src)),
  U.withBase("index.html")
)(src)

console.log(dst) // "public/team/about/index.html"
                 // corresponding to "/team/about/" URL

5. urlz is like CRUD for path fragments

// GET
console.log(U.leftDir("/foo/bar/baz.txt"))  // "foo"
console.log(U.rightDir("/foo/bar/baz.txt")) // "bar"

// UPDATE
console.log(U.withLeftDir ("qux", "/foo/bar/baz.txt")) // "/qux/bar/baz.txt"
console.log(U.withRightDir("qux", "/foo/bar/baz.txt")) // "/foo/qux/baz.txt"

// DELETE
console.log(U.dropLeftDir ("/foo/bar/baz.txt")) // "/bar/baz.txt"
console.log(U.dropRightDir("/foo/bar/baz.txt")) // "/foo/baz.txt"

// ...

6. urlz provides extra utils

TODO: describe

API

TODO: describe