Map parser-derived scopes to their own bindings, references, and constant violations.
Submit the example or replace it with your own input. Source is parsed but never executed.
Explicit static behavior
Bindings belong to lexical scopes, not simply lines. The report keeps scope parentage and binding facts together so shadowing remains visible.
Bindings belong to lexical scopes, not simply lines. The report keeps scope parentage and binding facts together so shadowing remains visible.
Reference and violation counts come from Babel traversal. They are static facts and do not predict values or control flow.
Tool Swim parses source as standard ECMAScript inside a disposable Web Worker with a 2,000 ms deadline. It never calls eval, Function, imported modules, or user code.
Source and results stay in the current browser tab. The public tool makes no API request, stores no preset, and does not require an account or telemetry.
