Asset pipeline doesn't uderstand static fields

[rlconst]

class Foo {
    static myField = "bar"
}

error reported about expected ( after myField

Mozilla

[gsartori]

We are experiencing the same issue trying to minify the chart.js library (https://www.chartjs.org) with Grails 6.2.0 / Asset Pileline 4.4.0

elements-extra.unminified.js:568:17: ERROR - [JSC_PARSE_ERROR] Parse error. '(' expected
  568|  static defaults = {};
                        ^

1 error(s), 0 warning(s)
Closure uglify JS Exception
asset.pipeline.processors.MinifyException: [JSC_PARSE_ERROR. Parse error. '(' expected at elements-extra.unminified.js line 568 : 17]
	at asset.pipeline.processors.ClosureCompilerProcessor.process(ClosureCompilerProcessor.groovy:81)
	at asset.pipeline.processors.ClosureCompilerProcessor$process$2.call(Unknown Source)
	at asset.pipeline.AssetCompiler$_compile_closure4.doCall(AssetCompiler.groovy:171)
	at jdk.internal.reflect.GeneratedMethodAccessor284.invoke(Unknown Source)
	at java.base@17/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base@17/java.lang.reflect.Method.invoke(Method.java:568)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:107)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323)
	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:274)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1035)
	at groovy.lang.Closure.call(Closure.java:412)
	at groovy.lang.Closure.call(Closure.java:406)
	at java.base@17/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base@17/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base@17/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base@17/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base@17/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base@17/java.lang.Thread.run(Thread.java:833)
> Task :app-test:assetCompile FAILED

[lamon]

@gsartori I had the same issue with chartjs, and until the problem is fixed, I excluded the js from the minify process:

assets {

    minifyJs = true
    minifyCss = true

    minifyOptions = [
        excludes: [
            '**/chart.umd.js'
        ]
    ]

}

[gsartori]

@lamon thank you for the workaround, unfortnuately we are including the .js file in a //= require directive so the exclusion is not working.

I'd love to be able to avoid files from being processed independently whether they are used in a require or not.

[rlconst]

Should fix #329

[rlconst]

Still doesn't work
[JSC_LANGUAGE_FEATURE] This language feature is only supported for UNSTABLE mode or better

Relevant options are here

There there ES2021 and UNSTABLE are missing. Probably instead of cases we should just try to call FeatureSet.fromString to be robust for future changes

Also relevant discussion about STABLE_IN and STABLE_OUT dynamic levels