Migration of custom FESI extensions to the IBM JSEngine

Migration of a custom FESI extension to a script extension makes your code shorter, easier to read, and easier to understand.

Note: Support for FESI is deprecated in IBM Verify Identity Governance Version 6.0.

For detailed information and examples about how to write new extensions, see the documentation in IM_HOME/extensions/doc/javascript/javascript.html.

The following example illustrates the migration steps.