The Functions Portal also provides the view of function logs. There are two Logs windows that you can enable: one on the bottom of the Test Pane on the right and the other on the bottom of the development console. These panes will display the same output:
The logs will display the Trace function along with what is called a function Pulse when the function was started, whether or not it completed successfully, and so on. Each log entry has a detailed timestamp.
The Logs pane comes with a few options such as Clear, Copy logs, or Expand. You can also pause the function execution ...