JavaScript comments break build

[xplosionmind]

This is the error I get in the log:

/opt/build/cache/bundle/ruby/3.0.0/gems/uglifier-4.2.0/lib/uglifier.rb:291:in `parse_result': Unexpected token: keyword (default). To use ES6 syntax, harmony mode must be enabled with Uglifier.new(:harmony => true). (Uglifier::Error)
--
\e[36m  1\e[0m // don't need frontmatter because liquid is handled internally...somehow...
\e[36m  2\e[0m 
\e[91m => \e[0mexport \e[91mdefault class JekyllGraph {\e[0m
\e[36m  4\e[0m 
\e[36m  5\e[0m   constructor() {
\e[36m  6\e[0m     this.graphDiv = document.getElementById('jekyll-graph');
\e[36m  7\e[0m   }
\e[36m  8\e[0m 
\e[36m  9\e[0m   // d3
\e[36m 10\e[0m   drawNetWeb () {
\e[36m 11\e[0m     let assetsPath = '' !== '' ? '' : '/assets';
==
    from /opt/build/cache/bundle/ruby/3.0.0/gems/uglifier-4.2.0/lib/uglifier.rb:221:in `run_uglifyjs'
    from /opt/build/cache/bundle/ruby/3.0.0/gems/uglifier-4.2.0/lib/uglifier.rb:166:in `compile'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-minifier-be6d0d56b1fc/lib/jekyll-minifier.rb:102:in `output_js'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-minifier-be6d0d56b1fc/lib/jekyll-minifier.rb:21:in `output_compressed'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-minifier-be6d0d56b1fc/lib/jekyll-minifier.rb:182:in `write'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/site.rb:231:in `block in write'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/site.rb:358:in `block (2 levels) in each_site_file'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/site.rb:357:in `each'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/site.rb:357:in `block in each_site_file'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/site.rb:356:in `each'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/site.rb:356:in `each_site_file'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/site.rb:230:in `write'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/profiler.rb:43:in `block in profile_process'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/profiler.rb:41:in `each'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/profiler.rb:41:in `profile_process'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/site.rb:75:in `process'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/command.rb:28:in `process_site'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/commands/build.rb:65:in `build'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/commands/build.rb:36:in `process'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/command.rb:91:in `block in process_with_graceful_fail'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/command.rb:91:in `each'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/command.rb:91:in `process_with_graceful_fail'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/lib/jekyll/commands/build.rb:18:in `block (2 levels) in init_with_program'
    from /opt/build/cache/bundle/ruby/3.0.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `block in execute'
    from /opt/build/cache/bundle/ruby/3.0.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `each'
    from /opt/build/cache/bundle/ruby/3.0.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `execute'
    from /opt/build/cache/bundle/ruby/3.0.0/gems/mercenary-0.4.0/lib/mercenary/program.rb:44:in `go'
    from /opt/build/cache/bundle/ruby/3.0.0/gems/mercenary-0.4.0/lib/mercenary.rb:21:in `program'
    from /opt/build/cache/bundle/ruby/3.0.0/bundler/gems/jekyll-30f795f5a7e0/exe/jekyll:15:in `<top (required)>'
    from /opt/build/cache/binstubs/jekyll:29:in `load'
    from /opt/build/cache/binstubs/jekyll:29:in `<main>'

[manunamz]

Related?

[xplosionmind]

My current workaround is adding to _config.yml:

jekyll-minifier:
  exclude: '/feeds/*'
  compress_css: false
  compress_javascript: false
  compress_json: false