typescript-vs-flowtype

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Infinite loop detection

4

Where should I add something like this? TypeScript: ```ts function hello(): never { // ok while(true) {} } ``` Flow: ```js function hello(): empty { // error, void is incompatible...

goodmind

conditional typing in Flow

1

https://github.com/niieani/typescript-vs-flowtype#conditional-typing You can the same, check this helper: https://gist.github.com/miyaokamarina/934887ac2aff863b9c73283acfb71cf0 ```jsx type $If = $Call< & ((true, Then, Else) => Then) & ((false, Then, Else) => Else), X, Then, Else, >;...

sibelius

Feature from here #20 landed.

Ebuall

Miss important factor: Language services / language server protocol support

3

I don't know about flow but you forgot to mention an important aspect about TypeScript. Is more than a language, is a language server, similar to LSP (https://github.com/Microsoft/language-server-protocol)) but on...

cancerberoSgx

[WIP] Those little things, both systems

2

They don't make or break a deal, but a load of those little thing does add up... like: TS: - badass autocomplete with literals https://github.com/Microsoft/TypeScript/issues/13789 Flow: ...

niieani

specifying generic parameters during call-time is available in flow 72

1

specifying generic parameters during call-time is available https://github.com/facebook/flow/releases/tag/v0.72.0 > Explicit type arguments in new and call expressions, e.g., f(x).

sibelius

Add objective error quality comparison

1

Flow 66 improved a lot error messages https://medium.com/flow-type/better-flow-error-messages-for-the-javascript-ecosystem-73b6da948ae2 I think it got better than Typescript

sibelius

Mention References for Flow and TypeScript

1

Flow: - https://medium.com/@raxwunter/secret-flow-types-86b2ebb30951#.u7j5ieab3 - https://github.com/facebook/flow/blob/master/src/typing/type_annotation.ml#L163 - http://www.saltycrane.com/blog/2016/06/flow-type-cheat-sheet/ - https://twitter.com/nodkz/status/870629967738155010 - https://www.youtube.com/watch?v=WgvAPzOmiP0 - https://qiita.com/coizmo/items/21578b7d13819bb26fc3#_reference-d4f1712e3e2a18b823ef - https://qiita.com/kinzal/items/e1898c89af5618e18334#_reference-afb4a1e9c90d42e7cc28 - https://qiita.com/kinzal/items/8e2978be3ec78663c70b#_reference-5b1da19d077e0f5e7bfe Both: - https://redditblog.com/2017/06/30/why-we-chose-typescript/

niieani

TypeScript 2.7 and 2.8 features

13

We need to update the readme to add the latest features from TS 2.7 and 2.8. Help appreciated!

niieani

New compiler flag will make TypeScript check function arguments contravariantly

1

Once this PR is merged: https://github.com/Microsoft/TypeScript/pull/18654

pelotom