@stardazed/streams-polyfill

@stardazed/streams-polyfill
===========================
This package provides a full polyfill for the Web Streams Standard
for use in browsers, including patching the built-in fetch and Response types
to support the body field for both downloading and uploading. It also provides the
TextEncoderStream and TextDecoderStream from the Encoding Standard
and the CompressionStream and DecompressionStream from the
Draft Compression Standard.

Download size: 26KiB gzipped, 114KiB uncompressed.

Usage
-----
There are two ways to use this package, as a simple
`

$3

First add this package to your project with your package manager of choice.

`
pnpm add @stardazed/streams-polyfill
npm install @stardazed/streams-polyfill
yarn add @stardazed/streams-polyfill
`

Then import it in your index.js/ts file, at application startup. Like with the include
method above, make sure this code runs before everything else.

`js
import "@stardazed/streams-polyfill";
`

All stream types are available globally after that point, no further actions are needed.

⚠️ For TypeScript users, you must use TypeScript 3.2 or newer to get type checking. If you
cannot upgrade to 3.2, you can use the older v2.0.0 version of this package that provides
a custom set of types.

API Usage
---------
See the following resources for more info on using the Streams standard.

* The Web Streams Standard Specification for documentation,
examples, etc.
* Mozilla's Streams API site
for a guide through the APIs with examples.

Supported Environments
----------------------
The core streams functionality requires ES6 classes, Symbol, Promise and
typed arrays to be implemented. Testing has only been done on current browsers but it
should work with Safari 9+, Edge 13+, Firefox 45+ and Chrome 42+. IE is not supported.

Adapting fetch to work with streams requires that the browser has native fetch and
Proxy objects. This comes down to: Safari 10.1+ (iOS 10.3+), Edge 14+, Firefox 52+
and Chrome 54+.

I have not tested older browsers with a fetch polyfill. It may work, it may not.
If you try it out, ensure the fetch polyfill loads before this one.

The text encoding streams require a compliant TextEncoder and TextDecoder to be present
either natively or through a polyfill. Browser support: Safari 10.1+, (iOS 10.3+),
Firefox 19+, Chrome 38+. Edge currently does NOT support these interfaces.

The pipeTo and pipeThrough methods of ReadableStream now support a signal field
of type AbortSignal to abort on ongoing pipe operation. This is fully supported but
requires a native or polyfilled implementation to be present.
Browser support: Safari 11.1+ (iOS 11.1+), Firefox 57+, Chrome 66+, Edge 16+.

$3


Node (as of January 2019) has no built-in fetch or web streams support. I did not do extensive
tests but this polyfill, when require()d, will install all streams types in Node's
global object and they then work as expected. Like with browsers, cooperation with any
fetch polyfills available has not been tested.

In general, polyfills are not used in Node. If you want to use web streams in Node, consider
using the Stardazed streams
package directly and optionally wrapping any fetch implementations you use with the
streams fetch adapter.

Node versions >= 7 should be sufficient.

Implementation
--------------
This polyfill uses the fully compliant Stardazed streams,
text encoding streams
and compression streams
implementations, and the streams fetch adapter
to connect the implementations to the current environment.

💡 NB: if you have your own ReadableStream replacement — including mocks or modifications
of the built-in type — and want to use it with fetch, you can use the fetch adapter
to have your code work with fetch` transparently.

Copyright
---------
© 2018-Present by @zenmumbler

License
-------
MIT