$ plk
ClojureScript 1.10.520
cljs.user=> (defn foo [^js x])
#'cljs.user/foo
cljs.user=> ^js {:a 1}
             ^
WARNING: Use of undeclared Var cljs.user/js at line 1
{:a 1}
cljs.user=>

neither should warn

@thheller why not? in CLJ:

$ clj
Clojure 1.10.0
user=> ^js {:a 1}
Syntax error compiling at (REPL:0:0).
Unable to resolve symbol: js in this context

in clj the :tag meta is actually resolved for compilation. in CLJS it is just a blank hint that is never resolved and always used as is

(given the more dynamic nature of JS that is fine)

so it's just a random symbol?

not random but just a symbol yes

they do guide the compiler and affect some of the generated code

$ plk
ClojureScript 1.10.520
cljs.user=> (let [js 'foo] ^js {:a 1})
{:a 1}
cljs.user=> (meta *1)
{:tag foo}

there seems to be a difference between ^ and using ^ in function arguments

so for clj-kondo I'll just turn warnings off in CLJS for type hinted function arguments / local bindings

it is news to me that this evaluated at all since all references I found in the code don't

ah yeah actually its a special case for all the collections that this is actually kept for the JS runtime and not just used by the compiler

@borkdude I think this is just a bug. the :tag meta should probably be elided like all these https://github.com/clojure/clojurescript/blob/3c7c37b27cb24810b2abb6410aa063b599fe2223/src/main/clojure/cljs/analyzer.cljc#L4017

what exactly is the bug?

:tag missing from that dissoc call

to me it seems like it should be in that list but it is quite pointless to tag CLJS collections since that overrides the actually correct tag

it was just an example, maybe not a good one

What's the recommended way to script something with clojurescript? I need to fetch some data, munge it and spit out a csv. Development in the REPL (preferrably via CIDER) and npm interop would be heaven

When I use reagent's

(defn foo []
   (fn [props]
     The props here will never change

Not matter how parent changing the state.

I think I know why, It seems I deal with how component render its children in a wrong way

Is this the correct way to deal with children in reagent?

(defn foo []
  (fn [props & children]
    (into [:div {...}
      children)))

Is this doable with Clojurescript? https://js13kgames.com/

Would be interested to know if anyone’s submitted to these contests before and what your experience was

@christian.gonzalez I'm not aware of anything - the key thing to make it into that competition would be to use ClojureScript at a low level

i.e. no persistent data structures

Right, that makes sense. Probably end up doing a lot of interop, avoiding deps

though at that point it would probably just make sense to do it in js

@christian.gonzalez yeah that's not a ton of advantage other than macros and Closure advanced compilation integration

http://swannodette.github.io/2013/06/10/porting-notchs-minecraft-demo-to-clojurescript best viewed in Chrome (though could be updated to be made fast everywhere these days), this is 4.1K

oh this is awesome thank you

And if you are curious, I found that David's code can be re-cast without mutation 🙂 https://blog.fikesfarm.com/posts/2014-07-14-nolens-notchs-minecraft-without-locals.html

Hi all, is there a good solid book or online resource for either: a) learning cljs for node dev or b) an honest appraisal of the tradeoffs of using cljs for node apps? Google search pushes lots of shallow references, not in-depth ones. (My context: refactoring GraphQL service—with dependencies on js-only libraries like Apollo —as it's starting to get too big and unwieldy already. Not already experienced with TS so learning curve whatever way I choose to go)

there's not too much to know - it works reasonably well

which is probably why you can't find much specific information

Hi David, ah, okay. I suppose I want a specifically cljs resources that are node-oriented, not react/fe-oriented

There are lots of great resources for the latter

well React is a framework and there's some machinery between ClojureScript so you need that type of thing

Node.js is just a JavaScript runtime more or less

I think you can just ask questions here and you'll probably get the answers you need

🙂

nice

p.s. I enjoy your talks on code very much, always thought-provoking and compelling, thank you for all your efforts

your welcome!

I was interested to build an interface webui like the Twitter one, where one could get events on top etc

Anyone knows which Lib pattern should I look?

I was thinking at reagent but I don't know if o' the webui design level one call such ui in particular term

How do you do Server Side Rendering for your Single Page App for SEO? Do you have battle tested solution?

in quickstart of clojurescript, is suggested clj isn't clj depracted in favor of clojure?

@darioszr clj isn't deprecated in favor of clojure (`clj` is really just a wrapper around clojure that adds rlwrap to make it easier to use)

@darioszr, what kinda needs your project have ?

Are you planning just the UI, or will the Back-end join the game ?

Thx @mfikes

The backend is already done

I just play around. Actually currently I was trying a way to Don't install 4000 pkgs like the lein reagent projets does

In idéal case I would like to have a webui with reagent, tomcat as server app, websocket for sync data

Between backend and front-end. Nothing special. The thing I'm trying to figure out is mostly how can do a minimal skeleton with reagent in this env.😁

So before having all ready i want to go the hard way, with the Lein reagent there is to much prepared

If anyone has link for this a part the upstram doc feel free to share

I just tried clojurescript today and I really like it:lambdalove:

@darioszr, Clojure is a hosted language. Clojurescript gives another taste of Clojure. If you really like it on the day one. Wait until it saves the day. Clojure/Clojurescript manage risks very well. So, your organization can do much more with it. --I assume your problem is right for the tool--