Spy-js Tool Window
The tool window is available only when the Spy-js plugin is enabled. The plugin is bundled with WebStorm and activated by default. If the plugin is not activated, enable it on the Plugins page of the Settings / Preferences Dialog as described in Enabling and Disabling Plugins.
The tool window opens when you launch a run configuration of the type Spy-js or Spy-js for NodeJS. As soon as the Spy-js tool captures an event, it shows the event itself, its details, and stack-traces. By clicking an event, you can open the trace file, which is a prettified source file with the script that the event launched.
The tool window consists of a common toolbar and two tabs with panes: