This is quite frustrating and I’d love to understand how historically this has happened. If I write the following valid ES6 code into discourse/services/foo.js.es6 and add it to the asset pipeline in Discourse it will fail to compile: const FOO = 'foo'; export default Ember.Service.extend({ [FOO]() { console.log('This should work'); } }); But alas I get: Bundling assets ** Execute assets:precompile rake aborted! MiniRacer::RuntimeError: Error: Line 3: Unexpected token [ JavaScript at throwError ( :2581:21) JavaScript at throwUnexpected ( :2643:9) JavaScript at parseObjectProperty ( :2914:17) JavaScript at :5663:38 JavaScript at parseObjectInitialiser ( :2943:24) JavaScript at parsePrimaryExpression ( :3082:20) JavaScript at :5663:38 JavaScript at trackLeftHandSideExpressionAllowCall ( :5565:61) JavaScript at parsePostfixExpression ( :3216:20) JavaScript at :5663:38 /opt/bitnami/apps/discourse/htdocs/vendor/bundle/ruby/2.3.0/gems/mini_racer-0.1.9/lib/mini_racer.rb:168:in `eval_unsafe' /opt/bitnami/apps/discourse/htdocs/vendor/bundle/ruby/2.3.0/gems/mini_racer-0.1.9/lib/mini_racer.rb:168:in `block (2 levels) in eval' /opt/bitnami/apps/discourse/htdocs/vendor/bundle/ruby/2.3.0/gems/mini_racer-0.1.9/lib/mini_racer.rb:239:in `timeout' /opt/bitnami/apps/discourse/htdocs/vendor/bundle/ruby/2.3.0/gems/mini_racer-0.1.9/lib/mini_racer.rb:167:in `block in eval' /opt/bitnami/apps/discourse/htdocs/vendor/bundle/ruby/2.3.0/gems/mini_racer-0.1.9/lib/mini_racer.rb:64:in `block in with_lock' /opt/bitnami/apps/discourse/htdocs/vendor/bundle/ruby/2.3.0/gems/mini_racer-0.1.9/lib/mini_racer.rb:64:in `synchronize' /opt/bitnami/apps/discourse/htdocs/vendor/bundle/ruby/2.3.0/gems/mini_racer-0.1.9/lib/mini_racer.rb:64:in `with_lock' /opt/bitnami/apps/discourse/htdocs/vendor/bundle/ruby/2.3.0/gems/mini_racer-0.1.9/lib/mini_racer.rb:165:in `eval' I know this is valid syntax as babel and ember-cli handle this just fine. The ES2015 specs (§12.2.6) even discuss it. I have also tried this syntax: { [dynamicMethodName]: function() {} } And it too has the same error.

I think I found a bug: Miniracer crashes with valid ES6 syntax

sam (Sam Saffron) January 16, 2018, 12:17am 2

Well we appear not to be traspiling it, miniracer gets transpiled js from Babel

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