I work adonis.js. I have a problem. When I open adonis project in WebStorm and PhpStorm, editors create a problem "jscs can not find". It is a general view. I try on both editor.
The same problem occur. I search it on the Google, they say we solve the problem, but it is alive.
Please try disabling JSCS support by clearing Enable checkbox in Settings | Languages & Frameworks | JavaScript | Code Quality Tools | JSCS - can you still see the error? Also, from screenshot it seems that ES6 syntax in your file is not accepted; please make sure to switch Javascript Language version (Settings | Languages & Frameworks | JavaScript) to ECMAScript 6