@fastly/as-url/README.md

# @fastly/as-url

![npm version](https://img.shields.io/npm/v/@fastly/as-url) ![npm downloads per month](https://img.shields.io/npm/dm/@fastly/as-url)

AssemblyScript library to implement the [WHATWG URL Standard](https://url.spec.whatwg.org/), similar to the [JavaScript URL Web API](https://developer.mozilla.org/en-US/docs/Web/API/URL).

## Installation

`@fastly/as-url` is available as a [npm package](https://www.npmjs.com/package/@fastly/as-url). You can install `@fastly/as-url` in your AssemblyScript project by running:

`npm install --save @fastly/as-url`

## Quick Start

This package attempts to be an implementation of the [JavaScript URL Web API](https://developer.mozilla.org/en-US/docs/Web/API/URL). Thus, the [JavaScript URL Web API documentation](https://developer.mozilla.org/en-US/docs/Web/API/URL) could also act as a helpful getting started guide. However, while most features are implemented, some features are still in development (e.g `URLSearchParams`). Please see the [reference documentation in the `reference-docs` directory](https://unpkg.com/@fastly/as-url/) for the full documentation.

```
import { URL } from '@fastly/as-url';

// Parse a complex absolute URL
const myComplexUrlString = 'https://user:pass@sub.example.com:8080/p/a/t/h?query=string#hash';
const url = new URL(myComplexUrlString);

let protocol = url.protocol; // "https:"
let username = url.username; // "user"
let password = url.password; // "pass"
let hostname = url.hostname; // "sub.example.com"
let port = url.port; // "8080"
let host = url.host; // "sub.example.com:8080"
let origin = url.origin // "https://sub.example.com:8080"
let pathname = url.pathname; // "/p/a/t/h"
let search = url.search; // "?query=string"
let hash = url.hash; // "#hash"
let href = url.href; // "https://user:pass@sub.example.com:8080/p/a/t/h?query=string#hash"

// Parse a relative URL
const relativeUrl = new URL(
  "../../p/a/t/h?query=string#hash",
  "https://fastly.com/path1/path2"
);

let relativeUrlHref = relativeUrl.href; // https://fastly.com/p/a/t/h?query=string#hash
```

Also, feel free to look through the [tests for additional examples](https://unpkg.com/@fastly/as-url/assembly/__tests__/).

## Reference API

The Reference API documentation can be found in the [`reference-docs/`](https://unpkg.com/@fastly/as-url/) directory.

## Changelog

The changelog can be found [here](https://unpkg.com/@fastly/as-url/CHANGELOG.md).

## Security

If you happen to find any security issues, please see the [Fastly Security Reporting Page](https://www.fastly.com/security/report-security-issue), or feel free to send an email to: `security@fastly.com`

We plan to disclose any found security vulnerabilites per the [npm security reporting guidelines](https://docs.npmjs.com/reporting-a-vulnerability-in-an-npm-package). Note that communications related to security issues in Fastly-maintained OSS as described here are distinct from [Fastly Security Advisories](https://www.fastly.com/security-advisories).

## Motivation

This library was built to be used as a dependency for [`@fastly/as-compute`](https://www.npmjs.com/package/@fastly/as-compute).

This library is based on the [WHATWG URL Standard](https://url.spec.whatwg.org/) and strives to match the [JavaScript URL Web API](https://developer.mozilla.org/en-US/docs/Web/API/URL) that [Node.js 's URL library](https://nodejs.org/api/url.html#url_the_whatwg_url_api) implements.

However, the goal of this library is not to be a 1-to-1 implementation of the Node URL API. The goal of this library is to enable sharing very similar, if not identical, URL code between Fastly's Compute@Edge platform and popular JavaScript platforms like Web Browsers and Node.

## License

[Apache-2.0 WITH LLVM-exception](./LICENSE)