Joe Pea

Unable to call `array.push(123)`, where`array` is an `Array<number>`

3

Is this a bug, or did I miss a feature of the type safety? https://hegel.js.org/try#DYUwLgBAdgXBCCAnRBDAngHigVwLYCMREA+CAXggG0AGAGgmoF0AoKAOgAdsBnACwAoAjACYAzAEogA

support for class-factory mixins

5

The following plain JS doesn't work: ```js function Foo(Base) { return class Foo extends Base { foo() { console.log('foo') } } } class Bar { bar() { console.log('bar') } }...

Multiple inheritance is possible in plain JavaScript. Type support in Hegel?

3

Hello! At the moment, I am able to use `Proxy` to implement a function called [`multiple()`](https://github.com/trusktr/lowclass/blob/601c8972815db519064075f358a52efe5f3e26ac/src/multiple.ts) (with its [unit tests](https://github.com/trusktr/lowclass/blob/601c8972815db519064075f358a52efe5f3e26ac/src/multiple.test.ts)) that can be used like this: ```js import {multiple} from...

How to publish packages?

2

Since Hegel doesn't emit its own declaration files, I am curious how to publish packages. Does Hegel just read the types from the source files?

refine type of array access to non-undefined given proper for-loop header

22

Maybe Hegel could check loop headers, and if the iteration variables are written properly, then it can narrow the types of array access to non-`undefined`. For example, in the code...

require explicit check for undefined?

11

[This code](https://hegel.js.org/try#MYewdgzgLgBGCuBbCAuGBBATpghgTwB4FEAjAU0wD4YBeGAbQAYAaARmYCZmBmZgFmYBWALoAoUQDMQmGAAoANmVgBLGowDcMZUSQQAdIrABzKAAtNygNSWAlDADeomDFCRYYWnF31lY5x4AyAJh4CDIAOSRZMBtRAF9xCXgwYChlcBCwyMRotGJyTDtHf3igA) has a runtime error. It will not use the `0` value. Should Hegel force us to explicitly check undefined to avoid the runtime error?

the "is" keyword (type predicates)

6

To allow for type refinement to be abstracted into functions: ```ts function isNumber(n: unknown): n is number { if (typeof n === 'number' && !isNaN(n)) return true return false }...

Just curious before trying.

Comment on issue 5.

1

Hi, it took me more than a couple days to reply, but I replied to issue #5. Thought I'd mention it here because I don't think we get notifications for...

Node.js usage.

11

Hi, I did some research, looking for an inline Worker+Blob API library. Basically, the three clear options on npmjs are `operative`, [`threadless`](https://www.npmjs.com/package/threadless), and [`paralleljs`](https://www.npmjs.com/package/paralleljs). `paralleljs` seems like something that would...