"Unable to compress and minify" when deploying ES6 syntax js thru steam

[dahogenelst]

I saw this warning being thrown by Wagon.

  persisting javascripts/bundle.jsWarning: Unable to compress and minify it, error: Unexpected token: name (continues). To use ES6 syntax, harmony mode must be enabled with Uglifier.new(:harmony => true).
 [done]

Possibly having to do something with this issue. If I follow their suggestion, my ES6 JS is properly compressed and minified again.

I've replaced

steam/lib/locomotive/steam/initializers/sprockets.rb

Line 46 in 67a5c77

self.js_compressor = :uglify

with self.js_compressor = Uglifier.new(harmony: true)

I don't really know for certain if I am properly using ES6, mixing it up with old school JS or doing something else wrong, but this helped solve my issue!

If you want a PR for this, I can make one.

[did]

hey @dahogenelst! In my recent LocomotiveCMS websites, I don't use Sprockets anymore to manage my JS/CSS but rather Webpack. More information about it here: https://doc.locomotivecms.com/docs/manage-js-and-css-with-webpack.