Registry / http-networking / url-toolkit

url-toolkit

library2.2.5jsnpmunverified

URL Toolkit is a lightweight, dependency-free JavaScript library designed to build absolute URLs from a base URL and a relative URL, specifically adhering to RFC 1808. The current stable version is `2.2.5`. The project maintains a steady release cadence, primarily focusing on bug fixes, performance improvements (like regex optimizations), and security updates (such as ReDoS vulnerability patches), with occasional documentation enhancements. Its key differentiator from the native `URL()` constructor in browsers and Node.js is its strict adherence to RFC 1808, which differs from the WHATWG URL Living Standard used by `URL()`. This difference notably affects how 'special URLs' (like `http:///example.com`) are normalized and parsed, making URL Toolkit suitable for environments or applications that require precise RFC 1808 compliance.

http-networking serialization

npm install url-toolkit

github ↗package ↗

INSTALL

IMPORT

SIG · URL-TOOLKIT

url-toolkit

http-networkingjavascriptv2.2.5

Install

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Import

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Disk

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Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

URLToolkit

✓ import * as URLToolkit from 'url-toolkit';

✗ import URLToolkit from 'url-toolkit';

The library exports a namespace object, not a default export. Use `* as` for consistent ESM usage.

buildAbsoluteURL

✓ import { buildAbsoluteURL } from 'url-toolkit';

✗ const { buildAbsoluteURL } = require('url-toolkit');

While CommonJS `require` works, named imports are preferred in modern ESM/TypeScript projects for tree-shaking and clarity.

parseURL

✓ import { parseURL } from 'url-toolkit';

✗ const parseURL = require('url-toolkit').parseURL;

For CommonJS, directly accessing the property is valid, but named ESM imports are generally better practice.

Demonstrates building absolute URLs with and without explicit path normalization, and parsing a URL into its RFC 1808 components.

import { buildAbsoluteURL, parseURL } from 'url-toolkit'; const baseURL = 'https://example.com/path/to/resource.m3u8?query=param#fragment'; const relativeURL = '../new-resource.ts?other=param#anotherFragment'; // Build an absolute URL const absoluteUrl = buildAbsoluteURL(baseURL, relativeURL); console.log('Absolute URL:', absoluteUrl); // Expected: https://example.com/path/new-resource.ts?other=param#anotherFragment // Build an absolute URL with explicit path normalization const absoluteUrlNormalized = buildAbsoluteURL(baseURL, '/root/other.ts', { alwaysNormalize: true }); console.log('Absolute URL (normalized path):', absoluteUrlNormalized); // Expected: https://example.com/root/other.ts // Parse a URL into its components const parsed = parseURL('http://user:pass@host.com:8080/path;params?query=string#hash'); console.log('Parsed URL:', JSON.stringify(parsed, null, 2)); /* Expected: { "scheme": "http:", "netLoc": "//user:pass@host.com:8080", "path": "/path", "params": ";params", "query": "?query=string", "fragment": "#hash" }*/

Debug

Known issues

gotchaURL Toolkit adheres to RFC 1808, which differs from the WHATWG URL Living Standard implemented by the native `URL()` API. This means parsing and resolution logic, especially for 'special URLs' or certain edge cases, will produce different results. For example, `http:///example.com` will be parsed differently.

fix

Thoroughly test URL parsing and resolution if migrating from or using alongside `URL()`. Understand RFC 1808 specifications for expected behavior or use `URL()` if WHATWG standard is preferred.

affects: *

breakingVersions of `url-toolkit` prior to `2.2.4` were vulnerable to Regular Expression Denial of Service (ReDoS) attacks due to inefficient regex patterns in URL parsing logic. Upgrading is crucial for security.

fix

Upgrade to version `2.2.4` or later to incorporate the patched regular expressions: `npm install url-toolkit@latest`.

affects: <2.2.4

gotchaWhen resolving relative URLs containing a colon (e.g., `a:b`), `url-toolkit` treats them as absolute if not prefixed with `./`. To ensure such URLs are treated as relative, explicitly prefix them with `./` (e.g., `./a:b`).

fix

Always use `./` prefix for relative URLs with colons if you intend for them to be resolved against the base URL (e.g., `buildAbsoluteURL(baseURL, './a:b')`).

affects: *

gotchaPath normalization (e.g., resolving `../` or `./`) is not always applied by default unless necessary according to RFC 1808. If you require consistent, full path normalization, you must explicitly set `opts.alwaysNormalize` to `true`.

fix

Pass `{ alwaysNormalize: true }` as the third argument to `buildAbsoluteURL` if consistent path normalization is desired: `buildAbsoluteURL(baseURL, relativeURL, { alwaysNormalize: true })`.

affects: *

gotchaVersion `2.1.5` changed how semicolons (`;`) are handled within URL fragments, allowing them to be correctly included. Older versions might have incorrectly parsed or truncated fragments containing semicolons.

fix

Upgrade to `url-toolkit@2.1.5` or later to ensure correct handling of semicolons within URL fragments.

affects: <2.1.5

Errors

Common errors & fixes

TypeError: URLToolkit.buildAbsoluteURL is not a function

Attempting to destructure `URLToolkit` when using CommonJS `require()` or incorrectly importing in an ESM context.

fix

For CommonJS, use `const URLToolkit = require('url-toolkit'); URLToolkit.buildAbsoluteURL(...)`. For ESM/TypeScript, use `import { buildAbsoluteURL } from 'url-toolkit';` or `import * as URLToolkit from 'url-toolkit'; URLToolkit.buildAbsoluteURL(...)`.

Property 'buildAbsoluteURL' does not exist on type 'typeof import("url-toolkit")' (TypeScript)

Incorrect TypeScript import statement, often trying to use a default import instead of a namespace or named import.

fix

Ensure you are using `import * as URLToolkit from 'url-toolkit';` or `import { buildAbsoluteURL } from 'url-toolkit';` to correctly access the functions.

Unexpected URL resolution result (e.g., `http:///example.com` not normalizing to `http://example.com`)

Misunderstanding the difference between RFC 1808 (implemented by `url-toolkit`) and the WHATWG URL Standard (used by native `URL()`). `url-toolkit` will not perform 'special URL' normalizations like `URL()`.

fix

Review the documentation on 'Differences to JS `URL()`' in the `url-toolkit` README. If WHATWG-compliant behavior is required, consider using the native `URL()` constructor instead.

Upgrade

Version history

2.2.5latest on npm

Audit

Dependencies

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Agent activity

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node

OpenAI (training)

Resources

githubhttps://github.com/tjenkinson/url-toolkit ↗

packagehttps://www.npmjs.com/package/url-toolkit ↗