Is logging possible in Khoros?

I suppose it depends on what kind of logging you're hoping to accomplish.

For example, one option is to use the FreeMarker logging utilities if you're wanting some server-side logging to occur.

Alternatively, if you are wanting to have some client-side logging for troubleshooting/debugging purposes in the browser console (i.e. Developer Tools > Console), then you can leverage jQuery to do this.

In our environment, I created a macro called custom.macro.logging.ftl to simplify client-side logging in our customizations, which looks like this:

<#------------------------------------------------
  Functions and Macros for Logging and Debugging
  Created By:           Jeff Shurtliff
  Last Modified By:     Jeff Shurtliff
  Last Modified Date:   2020-11-03
------------------------------------------------->

<#-------------------- Macro: consoleLog -------------------->
<#-- This macro prints an entry to the browser JavaScript console (i.e. console.log) -->
<#macro consoleLog logEntry="">
  <@liaAddScript>
    ; (function ($) {
      console.log("${logEntry}");
    })(LITHIUM.jQuery);
  </@liaAddScript>
</#macro>


<#-------------------- Macro: consoleError -------------------->
<#-- This macro prints an error to the browser JavaScript console (i.e. console.error) -->
<#macro consoleError logEntry="">
  <@liaAddScript>
    ; (function ($) {
      console.error("${logEntry}");
    })(LITHIUM.jQuery);
  </@liaAddScript>
</#macro>
  

<#-------------------- Macro: consoleDebug -------------------->
<#-- This macro prints a debug message to the browser JavaScript console (i.e. console.debug) -->
<#macro consoleDebug logEntry="">
  <@liaAddScript>
    ; (function ($) {
      console.debug("${logEntry}");
    })(LITHIUM.jQuery);
  </@liaAddScript>
</#macro>


<#-------------------- Macro: consoleInfo -------------------->
<#-- This macro prints an info message to the browser JavaScript console (i.e. console.info) -->
<#macro consoleInfo logEntry="">
  <@liaAddScript>
    ; (function ($) {
      console.info("${logEntry}");
    })(LITHIUM.jQuery);
  </@liaAddScript>
</#macro>


<#-------------------- Macro: consoleWarn -------------------->
<#-- This macro prints a warning message to the browser JavaScript console (i.e. console.warn) -->
<#macro consoleWarn logEntry="">
  <@liaAddScript>
    ; (function ($) {
      console.warn("${logEntry}");
    })(LITHIUM.jQuery);
  </@liaAddScript>
</#macro>

Then in my other custom components/macros/functions I am able to easily generate log entries by importing the macro file and calling one of the macros above, as demonstrated below.

<#-- Import the macro file -->
<#import 'custom.macro.logging' as logging />

<#-- Attempt to get the user ID -->
<#attempt>
  <#assign userId = user.id />
  <@logging.consoleDebug "The User ID is ${userId}" />
<#recover>
  <@logging.consoleError "Encountered an exception while retrieving the User ID" />
</#attempt>

Then while testing in the browser you can monitor the Console tab in Developer Tools and have a better understanding of what might be failing and why.

(I like to include the text "Encountered an exception while..." in error messages within the <#recover> directive because it reminds me that I should check out the Toolbox to see what the verbose FreeMarker error was so I can troubleshoot even further.)

I hope this helps!