Global State Diff is a browser-based utility that analyzes the impact of loading external JavaScript resources. When a tag is injected, the tool compares the object before and after execution to identify newly added globals — including functions, variables, and namespaces. This helps developers understand what a script exposes to the global scope.

Import Inspector complements global state diff by allowing users to specify a module URL and inspecting its exported bindings. It dynamically imports the module and lists all named and default exports, giving a clear view of what’s available for consumption.