Working with WebStorm projects
Whatever you do in WebStorm, you do that in the context of a project. A project in WebStorm is a folder with the source code your edit, the libraries and tools you use (for example, in the
node_modules subfolder), and various app configuration files (for example,
.eslintrc). Once you have opened a folder in WebStorm, the .idea subfolder is added to it where WebStorm stores its internal configuration settings, for example, for the project code style or the version control system.