MLE allows you to debug your JavaScript code by conveniently and efficiently collecting runtime state during program execution.

After your MLE code has finished executing, debug data collected can be used to analyze program behavior and discover and fix bugs. This form of debugging is known as post-execution debugging.

The post-execution debug option allows you to instrument your code with debugpoints. Debugpoints allow for the logging of program state conditionally or unconditionally, including values of individual variables as well as execution snapshots. Debugpoints are specified as JSON documents separate from the application code. No change to the application code is necessary for debugpoints to fire.

When activated, debug information is collected according to the debug specification and can be fetched for later analysis by a wide range of tools thanks to its standard format.