Source file structure
By default, WebStorm shows all classes, methods, and other elements of the current file. Right-click the toolbar of the Structure tool window and select the elements you want shown.
You can also see the VCS status color hints in the Structure tool window if your project is under version control. It helps you to make tracking changes in files more convenient. The names of modified objects become blue, and the names of the newly added objects appear in the tool window highlighted in green.