I don't really understand your example. In your code snippet here it looks
like you're lazy loading the module from the module itself? If that was
unintentional, where is this lazy loading code happening?

Something a bit more minimal and more complete would be helpful.

David

On Mon, Jan 29, 2018 at 12:07 PM, Khalid Jebbari <khalid.jebb...@gmail.com>
wrote:

> Hello,
>
> I'm trying to package all our trackers code (think Google analytics and
> the likes) into different splits so that they don't make base JS package
> too big and don't slow down time to interactive. Good idea, right ?
>
> Our strategy is basically to write the trackers code in Javascript first
> with Google Closure compiler in mind (goog.provide(), goog.require() etc.)
> and add those libs to our CLJS project and also package it as a standalone
> Javascript file for others non-CLJS project. So far it works really well,
> until now that I'm trying to code-split them.
>
> My first experiment fails because the code of the split ends up in the
> base package instead, even though the split file is created. But this split
> file is empty. Here's the configuration:
>
> Linux
> Boot 2.7.1 with boot-cljs 2.1.4
> Clojure 1.9
> ClojureScript  1.9.946
> Java 8 (openjdk version "1.8.0_144")
>
> CLJS compiler options:
>
> ```
> {:main           "yoda.core"
>  :libs           ["trackers/google_analytics.js" ] ;; lot of trackers
> here...
>  :modules        {:google-analytics {:entries   
> '#{yoda.tracking.google-analytics}
> ;; cljs namespace that wraps the call to JS tracker, to be able to call
> `(loader/set-loaded! :google-analytics)`
>                                      :output-to "js/google-analytics.js"}}
>  :asset-path     "/yd/js/main.out"
>  :optimizations  :simple
>  :source-map     true
>  :parallel-build true
>  :verbose        true}
> ```
>
> I use the modules like this in the CLJS code:
>
> ```
> ;; CLJS wrapper namespace
> (ns yoda.tracking.google-analytics
>   (:require [cljs.loader :as loader]
>             [trackers.google-analytics :as ga]))
>
> (defn start [ga-tracking-id entity]
>   (ga/start ga-tracking-id entity))
>
> (loader/set-loaded! :google-analytics)
>
> ;; Code that lazy-loads it somewhere else
> (loader/load :google-analytics
>              (fn []
>                ((resolve 'yoda.tracking.google-analytics/start)
> ga-tracking-id entity)))
> ```
>
> It seems to work when I look at the browser console:
> log:Module loaded: cljs_base
> log:Module loaded: google_analytics
>
> But when I examine the cljs_base.js and google_analytics.js files, the
> problem appears: cljs_base.js contains the code of my CLJS wrapper
> namespace, and google_analytics.js is empty (apart from the comment for
> source-map).
>
> With the `:verbose true` option it looks like the CLJS compiler does the
> work properly:
> Building module :google-analytics
> # ... several entries ...
> adding entry [trackers.google-analytics] # the JS code
> adding entry (yoda.tracking.google-analytics) # our CLJS wrapper namespace
> module :google-analytics depends on :cljs-base
>
> Furthermore I expected the google_analytics.js to be loaded with a network
> request, but there's only the request to load cljs_base.js.
>
> Is it because of cross module code motion ? It seems that the code of the
> CLJS tracker is moved to the main module, but I don't understand why.
>
> Thanks in advance for your help.
>
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