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.
It is important to distinguish EAP from traditional pre-release software. Please note that the quality of EAP versions may at times be way below even usual beta standards.
WebStorm 2017.3 Early Access Program