Error handling response - class java.lang.ClassCastException: clojure.lang.PersistentVector cannot be cast to java.lang.String
<eval>:12
:(function (){var writer__7270__auto__ = (new java.io.StringWriter());
                                         ^

ReferenceError: java is not defined
    at <eval>:12:42
    at <eval>:16:3
    at ContextifyScript.Script.runInThisContext (vm.js:50:33)
    at runInThisContext (vm.js:139:38)
    at global.SHADOW_NODE_EVAL ([stdin]:75:30)
    at 

@idiomancy that looks like it is trying to eval clojure code? that certainly is not valid CLJS 😉

yeah, thats what I mean. This seems to be an error printing an exception. This is very strange.

its an error with a websocket call

being executed from js interop

with no clojure involved

what are you sending to the REPL?

it looks to me like something is sent to the REPL to be eval'd

hence the websocket in the stacktrace since that triggers the eval

its an rpc call

doing blockchain stuff

thats interesting though

it looks to me like you are sending maybe some CLJ macro code to the REPL

ie. code that expands to CLJ not CLJS

hmmm

Hey guys! Just encountered something strange with :infer-externs :auto (shadow 2.7.9): Given this code:

(ns foo.bar)
(defprotocol JustUsedAsATag)
(defrecord SomeRecord [field]
    JustUsedAsATag)

Cannot infer target type in expression (. (. SomeRecord -prototype) -foo$bar$JustUsedAsATag$)

@ggaillard interesting. never seen that before. it did not happen previously?

Has anyone tried nw.js with shadow-cljs ?

I'm using it with electron which is pretty much the same idea AFAICT?

yes

@thheller Can you point me to a sample link on github?

no idea about nw.js

I mean electron.

slightly old but should still work https://github.com/shadow-cljs/examples/tree/master/electron

https://github.com/ahonn/shadow-electron-starter

https://github.com/thheller/shadow-cljs/blob/master/shadow-cljs.edn#L106-L129

WoW this is what i wanted, thanks @thheller

Good morning! Is clj-refactor supported with the CIDER in shadow? Manually adding the dependencies don't seem to help. Here's what I currently have:

;; :dependencies 
                [com.billpiel/sayid "0.0.17"]
                [refactor-nrepl "2.4.0"]
                [cider/cider-nrepl "0.19.0-SNAPSHOT"]
;; Output after cider-connect
WARNING: No Clojure project was detected. The
refactor-nrepl middleware was not enabled. (You can mute this
warning by customizing `cljr-suppress-no-project-warning'.)

you need to add the middleware I guess

:nrepl {:middleware [something.from.refactor-nrepl]}

@thheller: I still fail with building a working :release build. I get this stack trace (hopefully I haven't trunkated it too early again):

TypeError: Cannot read property 'core' of undefined
extensionHostProcess.js:344
	at Object.<anonymous> (/Users/petery/Projects/calva-lib/packages/lib/cljs.core.js:8:280)
	at Object.<anonymous> (/Users/petery/Projects/calva-lib/packages/lib/cljs.core.js:2044:3)
	at Module.t._initNodeRequire.r._compile (/Applications/Visual Studio )
	at Object.Module._extensions..js (module.js:653:10)
	at Module.load (module.js:561:32)
	at tryModuleLoad (module.js:504:12)
	at Function.Module._load (module.js:496:3)
	at Function.t._load (/Applications/Visual Studio )
	at Function.t.getExtensionPathIndex.then.s._load (/Applications/Visual Studio )
	at Function.t.getExtensionPathIndex.then.r._load (/Applications/Visual Studio )
	at Module.require (module.js:586:17)
	at n (/Applications/Visual Studio )
	at Object.<anonymous> (/Users/petery/Projects/calva-lib/packages/lib/calva.fmt.formatter.js:1:232)
	at Object.<anonymous> (/Users/petery/Projects/calva-lib/packages/lib/calva.fmt.formatter.js:37:3)
	at Module.t._initNodeRequire.r._compile (/Applications/Visual Studio )

(ns calva.js-utils)

(defn ^:export jsify [o]
  (clj->js o))

(defn ^:export cljify [o]
  (js->clj o :keywordize-keys true))

what do the first few lines of /Users/petery/Projects/calva-lib/packages/lib/cljs.core.js look like?

First two:

var window=global;var $CLJS=require("./cljs_env");require("./goog.math.long.js");require("./goog.math.integer.js");require("./goog.string.string.js");require("./goog.object.object.js");require("./goog.array.array.js");require("./goog.uri.uri.js");require("./goog.string.stringbuffer.js");
var cljs$cst$keyword$ns,cljs$cst$symbol$root,cljs$cst$symbol$default_DASH_dispatch_DASH_val,cljs$cst$symbol$mseq,cljs$cst$symbol$defrecord_STAR_,cljs$cst$keyword$val,cljs$cst$symbol$_meta,cljs$cst$symbol$js_STAR_,cljs$cst$symbol$__hash,cljs$cst$symbol$ns_STAR_,cljs$cst$symbol$ascending_QMARK_,cljs$cst$symbol$fqn,cljs$cst$symbol$update_DASH_count,cljs$cst$symbol$off,cljs$cst$symbol$cnt,cljs$cst$keyword$status,cljs$cst$keyword$descendants,cljs$cst$symbol$nil_DASH_val,cljs$cst$symbol$dispatch_DASH_fn,

looks like its supposed to

can you gist the full file?

Sure!

https://gist.github.com/PEZ/fa9cb69385d3dda4818688c74d9562eb

hmm odd

not sure why this is happening but the code is in the wrong order

may actually happen because of :simple. not actually sure though.

Let me try to remove that then…

hmm yeah its probably because of :simple

$CLJS.cljs = { tools: {} }; is declared too later

or rather it is used before it is declared

Yeah, w/o :simple the build works.

I assume it does not really matter for my extension?

How do i reference a javascript file from CLJS? i already inserted the folder in the source path

https://shadow-cljs.github.io/docs/UsersGuide.html#classpath-js

@thheller, do you recommend using this when working with JSX or there is another way?

i am already compiling the files with babel

the babel example I linked the other day is pretty much what I recommend yes

Do you know what is the main cause of this error? :

[:app] Build failure:
The required JS dependency "Components/list" is not available, it was required by "dbiz_health/common/views.cljs".

Searched in:/Users/pimentel/Projetos/dbiz-health/node_modules

You probably need to run:
  npm install Components/list

it is looking for it in node_modules

:source-paths
 ["src/cljs"
  "src/clj"
  "src/gen"
  "test/cljs"
  "test/clj"]

because you didn't read the docs

when i read them i got the belief that putting the folder in sources was enough, i think i did not read it more carefully

you need the / in front otherwise it'll check node_modules as thats the notation for npm

it worked, thanks

I’m seeing that this example is kinda different from the javascript i generated locally

import React from "react"


const MyComponent = ({ key }) => {
  console.log('child props: ', key)
  return (
    <li key={key}>
      Hello JSX!
    </li>
  )
}

const MyDefaultComponent = ({ children }) =>
  <div>
    <h1>Hello JSX!</h1>
    <ul>
      {children}
    </ul>
  </div>


export { MyComponent }

export default MyDefaultComponent

I’m having a null reference error in “React”

My generated file is importing React with the ES6 syntax import React from "react"

and the one from the example is doing it in another way

Should i try to generate .js files like that or the cause for this error is other?

Error:

MyComponent.js:7 Uncaught TypeError: Cannot read property 'createElement' of undefined
    at MyComponent (MyComponent.js:7)
    at beginWork (react-dom.development.js:14564)
    at performUnitOfWork (react-dom.development.js:17821)
    at workLoop (react-dom.development.js:17861)
    at HTMLUnknownElement.callCallback (react-dom.development.js:150)
    at Object.invokeGuardedCallbackImpl (react-dom.development.js:200)
    at invokeGuardedCallback (react-dom.development.js:257)
    at replayUnitOfWork (react-dom.development.js:17108)
    at renderRoot (react-dom.development.js:17980)
    at performWorkOnRoot (react-dom.development.js:18838)

you must generate ES6 modules. don't let babel turn import into require

also you pasted the same code twice? where is yours?

ops, i think i edited the wrong post,

i will edit it again

So, i did a test here

and with es2015 it works fine

i just need to learn how to make it to work with es2016

i will post the generated es2016

generated es2016:

import React from "react";

var MyComponent = function MyComponent(_ref) {
  var key = _ref.key;

  console.log('child props: ', key);
  return React.createElement(
    "li",
    { key: key },
    "Hello JSX!"
  );
};

var MyDefaultComponent = function MyDefaultComponent(_ref2) {
  var children = _ref2.children;
  return React.createElement(
    "div",
    null,
    React.createElement(
      "h1",
      null,
      "Hello JSX!"
    ),
    React.createElement(
      "ul",
      null,
      children
    )
  );
};

export { MyComponent };

export default MyDefaultComponent;

lgtm

the null reference error is coming from React when trying to call .createElement

hmm es6 is supposed to work but maybe the import stuff for npm is broken there

haven't used that in a while

stick with es2015 for now. don't have time to look into it right now.

alright

the difference between using e2016 and 2015 is that es2015 does’nt get google closure’s advanced optimization, right?

that is correct yes