Support the Minimum Common Web Platform API

[saghul]

https://common-min-api.proposal.wintercg.org/

---

Interfaces:

• AbortController
• AbortSignal
• Blob
• ByteLengthQueuingStrategy
• CompressionStream
• CountQueuingStrategy
• Crypto
• CryptoKey
• DecompressionStream
• DOMException
• Event
• EventTarget
• File
• FormData
• Headers
• ReadableByteStreamController
• ReadableStream
• ReadableStreamBYOBReader
• ReadableStreamBYOBRequest
• ReadableStreamDefaultController
• ReadableStreamDefaultReader
• Request
• Response
• SubtleCrypto
• TextDecoder
• TextDecoderStream
• TextEncoder
• TextEncoderStream
• TransformStream
• TransformStreamDefaultController
• URL
• URLSearchParams
• WebAssembly.Global
• WebAssembly.Instance
• WebAssembly.Memory
• WebAssembly.Module
• WebAssembly.Table
• WritableStream
• WritableStreamDefaultController

Global methods / properties:

• globalThis
• globalThis.atob()
• globalThis.btoa()
• globalThis.console
• globalThis.crypto
• globalThis.fetch()
• globalThis.navigator.userAgent
• globalThis.performance.now()
• globalThis.performance.timeOrigin
• globalThis.queueMicrotask()
• globalThis.setTimeout() / globalThis.clearTimeout()
• globalThis.setInterval() / globalThis.clearInterval()
• globalThis.structuredClone()
• globalThis.WebAssembly.compile()
• globalThis.WebAssembly.compileStreaming()
• globalThis.WebAssembly.instantiate()
• globalThis.WebAssembly.instantiateStreaming()
• globalThis.WebAssembly.validate()

[bnoordhuis]

To avoid duplication across embedders, atob, btoa, structuredClone¹, queueMicrotask and performance could be implemented as quickjs-ng C APIs or JS globals. We'd also have to add DOMException but that seems okay to me. We can make them opt-in when the JSContext is created.

Thoughts?

¹ TBD how to handle transferables

[saghul]

Yep makes sense to me, let's do that!

[jimmywarting]

txiki.js/src/js/polyfills/blob.js

Lines 1 to 8 in c7c5aa9

	import { Blob } from 'blob-polyfill';
	Object.defineProperty(window, 'Blob', {
	enumerable: true,
	configurable: true,
	writable: true,
	value: Blob
	});

For a better Blob and File polyfill I would recommend taking a look at fetch-blob

[saghul]

Thanks!

[guest271314]

navigator.userAgent. See wintercg/proposal-minimum-common-api#62.

[saghul]

navigator.userAgent. See wintercg/proposal-common-minimum-api#62.

Done in #439

[guest271314]

Ehe WinterCG folks banned me from over there at Minimum Common world already. No notice, no reason given. Weak. Anyway, carry on.