addListener to chrome.commands.onCommand from ClojureScript not triggering function

[Marcelo Almeida]

Copied from my post on StackOverflow (http://stackoverflow.com/q/33808596/1814970).


I have the following code, in a new extension I am working on:

(.addListener js/chrome.alarms.onAlarm (fn [alarm] (.log js/console alarm)))
(.addListener js/chrome.commands.onCommand (fn [command] (.log js/console command)))
(.addListener js/chrome.browserAction.onClicked (fn [] (.log js/console "clicked!")))

My :cljsbuild looks like this:

{:id "background"
:source-paths ["src/folder/background"]
:compiler {:output-dir "resources/public/js/compiled/background"
:output-to "resources/public/js/compiled/background/background.js"
:main folder.background.background
:optimizations :advanced
:pretty-print true
:source-map "resources/public/js/compiled/background/background.js.map"
:externs ["resources/public/js/chrome_extensions.js"]}}

The code is exactly in the order shown. The bizarre thing is that the first and third lines work, while the second does nothing. My manifest.json (relevant parts) looks like this (there is no parsing error):

"background": {
"scripts": [
"path/to/compiled/file.js"
]
},
"permissions": [
"alarms",
"commands"
],
"commands": {
"do-something": {
"suggested_key": {
"default": "Alt+Shift+D"
},
"description": "Do it!"
}
}

I have advanced compilation on and I have the correct extern file (this works, except for this particular case).

Last, but not least, I did a JavaScript version of this and the same thing works. How can it be??

chrome.commands.onCommand.addListener(function (command) {
console.log(command);
});

Thanks in advance!

[Karsten Schmidt]

AFAIK this is NOT how you refer to nested object properties in CLJS:

js/chrome.commands.onCommand

use this instead:

(.addListener (.. js/chrome -commands -onCommand) (fn [e] ...))

K.

On 19 November 2015 at 17:07, Marcelo Almeida

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Karsten Schmidt
http://postspectacular.com | http://thi.ng | http://toxiclibs.org

[Karsten Schmidt]

Oh, and if these chrome props end up mangled in advanced compilation,
you should use `aget` or find/make a little externs file...

(.addListener (aget (aget js/chrome "commands") "onCommand") (fn [e] ...))

[Marcelo Almeida]

Thanks for your answer!

I've been bashing my head against this for a while now and all of a sudden my trivial example, which was not working, is working. The project is here: https://github.com/marcelocra/chrome-extension-cljs-example.

The nested syntax I used does work (looked into it and it seems that both are valid and both gave me the same results). Regarding mangling, I am using the chrome_extensions.js extern provided in the Google Closure repo (its names are not mangled in the output js, even in advanced mode).

I will continue adding stuff to this basic project and if I manage to reproduce the problem again, I post it here.

Thanks again!