What is Early Access Program?
We at JetBrains believe that making tools for developers should greatly involve listening to developers.
Our Early Access Program lets development community closely participate in the product development: try pre-release versions of WebStorm to evaluate features, provide early feedback on our issue tracker, participate in discussions, and influence product development, from early stages onwards.
WebStorm 2017.1 Early Access Program
Follow product updates on Twitter or select the Early Access Program channel for updates in the IDE (Preferences | Appearance & Behavior | System Settings | Updates) to be notified when the next Early Access Program build is available.