I found this old thread on the google group discussing binding in CLJS https://groups.google.com/forum/#!topic/clojure/6cmnkHmHBNw The main point is this

user=> (def ^:dynamic x "root")
#'user/x
user=> x
"root"
user=> #'x
#'user/x
user=> ((binding [x "dynamic"] (fn [] x)))
"root"

Is there a work around to make binded vars respect local bindings when used within nested functions?

well, you can lexically bind the value

cljs.user=> ((binding [x "dynamic"]
       #_=>    (let [x' x]
       #_=>      (fn [] x'))))
"dynamic"

i think the nature of dynamic vars is that their value is set by the current binding. your fn is constructed in the binding but is evaluated after the binding

if you move the binding out of the invocation it should work, or if you capture the current binding into a non dynamic var

@currentoor your example is equivalent to this form:

(let [f (binding [x "dynamic"]
          (fn [] x))]
  (f))

@dpsutton thanks, this this seems to work

(def ^:dynamic x "root")

(defn foo []
  x)

(binding [x "dynamic"]
  (foo))

but for some reason when i do this across an iframe element in react it doesn’t get the dynamic valuue

perhaps i’m doing something wrong

i’ll play with my code more

i have a modal library i’m using, and i want to bind a *mount-node* var to an iframe’s document.body whenever a component is used inside an iframe

and default to the outermost document.body whenever the component is used in a regular context

is there any reason that shouldn’t work?

i’m not sure how the iframe interacts with the dynamic var

is there a reason you’re using dynamic vars and not React context?

Hi, I have the following code to create a Firebase Cloud Function that reacts when an entry is added to the database:

(ns gcf.core
  (:require ["firebase-functions" :as fb-fn]))

(defn db-ref []
      (.ref (.-database fb-fn) "/trollbox/{messageId}"))

(def translate-fn
  (.onCreate (db-ref)
             (fn [snapshot context]
                 (println "Executing function...")
                 (println (str "Value: " (.val snapshot))))))

(def exports #js {:translateHTTP translate-fn})

TypeError: a.D is not a function
    at /user_code/gcf.js:247:1067
    at cloudFunctionNewSignature (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:105:23)
    at cloudFunction (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:135:20)
    at /var/tmp/worker/worker.js:779:24
    at process._tickDomainCallback (internal/process/next_tick.js:135:7)

{:source-paths ["src"]
 :builds       {:gcf {:target :node-library
                      :main gcf.core/main
                      :output-to "gcf.js"
                      :exports-var gcf.core/exports}}}

{
  "name": "functions",
  "description": "CLJS Cloud Functions for Firebase",
  "scripts": {
    "serve": "firebase serve --only functions",
    "shell": "firebase functions:shell",
    "start": "npm run shell",
    "deploy": "firebase deploy --only functions",
    "logs": "firebase functions:log"
  },
  "dependencies": {
    "firebase-admin": "^7.0.0",
    "firebase-functions": "^2.1.0"
  },
  "private": true
}

you can try building with shadow-cljs release --debug and see if that gives any more info

it sounds like (.val snapshot) is being optimized into something. changing it to (.val ^js snapshot) might fix it

@artrmrno add :compiler-options {:infer-externs :auto} to your build config and you'll get a warning that you need to typehint the .val invoke. Also :main does not apply to :node-library configs, you can remove that.

Hi guys!I have a seemingly big issue with figwheel. I cannot for the life of it get the figwheel repl to work not even thinking about getting it to work with cider. I have now tried it for days and with all the famous linux distros (arch, debian, ubuntu, fedora,...). I just wanted to get a simple project to work to get it eventually to work with cider, because that introduces another set of possible issues and I haven't got it to work. So I cloned the example flappy-bird-demo-new project and ran

lein fig:build

lein fig:build

Opening url http//:localhost:9500

I also completely deleted the project, cloned it again and ran

lein fig:build

I'm getting really frustrated, because I cannot figure out what the problem is. I also did not find anything online about it.

I'm using Leiningen 2.9.0 with Java 1.8.0_202b26.

So your browser doesn't open with the localhost url? What happens if you open it manually? Btw there's a dedicated #figwheel-main channel

No, sorry. The webpage opens

everytime

but I never get a cljs prompt in my terminal

Have you checked the browser console? Any errors?

I checked that once and did not see anything relating to that, but let me check again.

The CLJS prompt opens once the browser successfully connects to figwheel. It should report to the console.

log:Opening the WebSocket on  logger.js:367:5
 [goog.net.WebSocket] Opening the WebSocket on  console.js:203:20
log:WebSocket opened on  logger.js:367:5
 [goog.net.WebSocket] WebSocket opened on  console.js:203:20
log:Session ID: e69315e5-95e0-4101-90c7-9908d271cec0 logger.js:367:5
 [Figwheel REPL] Session ID: e69315e5-95e0-4101-90c7-9908d271cec0 console.js:203:20
log:Session Name: Rosie logger.js:367:5
 [Figwheel REPL] Session Name: Rosie

and some warning about react

The thing I don't get is. Why does it happen after a reboot? I created some snapshots on my virtual machine before and after I built the project the first time and after the restart. If I go back to the snapshot where I have not yet built the project it always works. As soon as I reboot I don't get the prompt anymore.

Seems like the browser is connecting fine. Sounds weird, I'm not sure what could be the problem.

Can anyone offer a pointer on how to create a command line vanilla (non-lein, figwheel) REPL for a Clojurescript project that can access installed node_modules? All in the same directory I have a src folder, a deps.edn that includes src in :paths, package.json and node_modules with installed modules. I can boot a REPL with clj -m cljs.main -re node, and it can find my code. But it can't find the installed Node modules.

ClojureScript 1.10.439
cljs.user=> (require '[db.etl.staging])
module.js:545
    throw err;
    ^

Error: Cannot find module 'aws-sdk'
    at Function.Module._resolveFilename (module.
    ...

I'm suprised that nobody else seems to have the same problem. As I said, I tried it with several different Linux distros and with jdk 11. On my Virtualbox and directly on my laptop. I always have the same issue.

What are you using as a system?

@dev632 just staying in your base system, what is your host OS?

I'm using windows 10

But as I said I have the same issue if I install a clean system on my thinkpad

thinkpad = linux?

yes. and for testing puposes I have another asus laptop on which I run Windows 10 and Virtualbox.

ok. let's stay in linux on the thinkpad. it's lein 2.9.0, figwheel-main 0.2.0, correct?

A moment please. I have to boot it up

Ok. Leining is 2.9.0, Java is 1.8.0_202 and the figwheel-main version from the sample project is 0.1.5

rebel-readline-cljs is at 0.1.4 if it's of any use

bump figwheel main to 0.2.0 so you can follow the setup guide

FWIW I had to bump figwheel main yesterday to 0.2.0 when I tried to use it with Clojure 1.10. Dunno if that helps

^ good data point. Hopefully it just works ™️ now

OK. So I changed it in the project.clj of the flappy-bird-demo-new project but I still have the same problem

can you paste the alias in your project.clj that fig:build is supposed to be invoking?

"fig:build" ["trampoline" "run" "-m" "figwheel.main" "-b" "flappy" "-r"]

thing is. even if i try to create to most simple project with only a folder and a deps.edn with the following line:

{:deps {com.bhauman/figwheel-main {:mvn/version "0.2.0"}}}

Of course I then run

clj -m figwheel.main

ok. so i cloned that project, ran lein fig:build and immediately it opened up my browser and i started playing flappybird

i didn't bump figwheel main or anything. so there's something up with your install it seems

yes. that works for me too

and there are no vms, no docker, anything funky going on?

oh. i thought it didn't work

what's the issue you are seeing then

Can I post pictures here?

maybe a screenshot is more clear

what is "the same problem" i'm not sure what we are trying to fix

The problem is, that the last thing I see in my terminal after I started the project is:

Opening URL 

and I don't get to the prompt

cljs.user==>

where I could directly interact with the browser

what are you greeted with when you open that url manually?

same as when it's opened automatically

in the console I see that it says: [Figwheel REPL] Session Name: Vanita

i'm still not quite following. when you open it manually, it behaves the same as when it works automatically. and in neither case do you get a connected repl?

what is visible in the browser tab?

i got the game visible. is your screen just plain white? does it say something like "keep on figwheelin'"

I can play the game in the broswer tab

no

so the only issue is that the browser doesn't open automatically?

but when you open it manually everything works?

that is what I get.

if I run the project on a freshly installed system then after the last line I get a prompt like:

cljs.user==>

ok. this is what you get when the browser seems to be working? it never connects back? And again there are no vms involved, no docker, no shenanigans?

yes

the browser is always workin

ok. sorry i was so dense. just wanted to make sure i understood exactly what was going on

no problem

look in the sources tab in the browser console. we can check if figwheel main is putting its required things to start figwheel

look for any 404's or anything like that

ther is a figwheel folder inside the "cljs-out -> flappy" folder

the only 404 I see is for the favicon

see something like this? requiring figwheel core?

what do you mean by "requiring figwheel core"

otherwise it seems the same to me

do you see that script right there "goog.require("figwheel.core");

yes

^^

ok. then i don't know

are you using linux yourself?

i'm doing this on my mac. was running a job on my fedora machine

i can do it there though

it cranked right up immediately

i'm sorry. i don't know what's going on with your stuff

are you willing to try something really weird and almost nonsensical?

ok

there seems nothing to loose here

nevermind, it doesn't make any sense

what version of lein are you using dpsutton?

there are some slow code loading issues related to the 202 version of java you are using. I was gonna see if you could go back to an older java version

^^ that thing itself doesn't make any sense 🙂

i'm 2.9.0 on all boxes

latest CIDER requires it due to nrepl 0.6.0

thanks for your help

like I said it I'm surprised that nobody else on linux seems to have this problem

well, from the legions of people who don't, we're surprised you have the problem 🙂

i hope you can resolve it.

the worst thing to hear is "works on my machine"

if I can I'll you all know 🙂

yep 🙂

Thanks @lilactown & @thheller, your recommendations solved my problem.