- VSCode Version: 0.10.11 - OS Version: OS X El Capitan v 10.11.4 Steps to Reproduce: 1. Create a new file with the extension `.es6` and the following code ``` javascript class Testing { constructor() { this.myValue = "Hello World"; } test() { return this.myValue; } } ``` 2. The Language Mode is automatically set to "JavaScript", but on `this.myValue` you get `Property 'myValue' does not exist on type 'Testing'` errors. 3. Close the file and rename it to use a `.js` extension 4. Open the file and notice that the errors are gone