# Debugging Scripts (2025.23) Source: `help-portal-704272da511143d686ca6949040b9a68.md`. ## Locate scripts in browser devtools - Run the app once, open **Sources** in Chrome DevTools. - Search `Ctrl+P` for files named `..js` inside folder `` under `sandbox.worker.main...`. - `onInitialization` scripts use widget name `Application`. ## Breakpoints - Add breakpoints on line numbers in DevTools; blue marker indicates active breakpoint. - Multiple breakpoints allowed; click to remove. ## Debug mode - Add `debugger;` statements in scripts. - Launch app with URL parameter `debug=true` to pause automatically at those statements: `[https:///.../application//?mode=present&debug=true`](https:///.../application//?mode=present&debug=true`) - Comments are preserved in transformed JS to aid identification.