Author-written functions in Flow Designer

See also

Sources

1. 1
   Neither the Flow Designer article's self-loop table nor the system limits article's copy lists Function among the throttled activities, so no published ceiling caps how many times a function can be re-entered in one interaction.

   Build and manage flows with Flow Designer · System-enforced self-loop limits table, all 21 rows; the system limits article's Self-loop limits for Flow Designer activities table · Checked 2026-09-05
2. 2
   Console logs are not exposed in the function test runner; a function can surface debug information only by setting and reading a custom output string array.

   Build and manage flows with Flow Designer · Create and manage functions, FAQ on testing code · Checked 2026-09-05
3. 3
   The only sentence characterising the function execution environment names a packaging and invocation model rather than a network policy.

   Build and manage flows with Flow Designer · Create and manage functions, FAQ on how the function works · Checked 2026-09-05
4. 4
   The complete published statement on what code inside a function may use is that common native libraries are available and custom modules are not supported; the native libraries are never enumerated.

   Build and manage flows with Flow Designer · Create and manage functions, FAQ on library limits · Checked 2026-09-05
5. 5
   No sentence in the functions documentation or its frequently asked questions uses the words network, internet, outbound, egress, sandbox, isolation, firewall, allow-list or proxy.

   Build and manage flows with Flow Designer · Create and manage functions and its FAQ subsection, exhaustive keyword search of extracted text and raw body · Checked 2026-09-05
6. 6
   One frequently asked question states that a function sets 1 JSON output variable and another states that multiple variables can be set from the code block.disputed

   Build and manage flows with Flow Designer · FAQ on input and output variables, against the FAQ on setting multiple variables · Checked 2026-09-05
7. 7
   Publishing a function after editing its source code or settings updates the change immediately in every flow consuming those tagged versions, and the only stated safeguard is an instruction to be mindful.

   Build and manage flows with Flow Designer · Create a function, step 5, closing paragraph · Checked 2026-09-05
8. 8
   Functions carry 6 published limits: 200 functions per organisation, 128 MB of memory per function, 5000 lines of code, 5 seconds of execution, 10 input variables and 1 JSON output variable.

   Build and manage flows with Flow Designer · Create and manage functions, Important considerations and FAQs · Checked 2026-09-05
9. 9
   Flow Designer functions run author-written JavaScript on Node.js 22.x and Python 3.13, described as available in the first phase.

   Build and manage flows with Flow Designer · Create and manage functions, FAQ on supported languages · Checked 2026-09-05
10. 10
    The self-loop limit tables in the Flow Designer article and the system limits article agree on every value across all 21 activities.

    System limits in Webex Contact Center · Self-loop limits for Flow Designer activities table, compared cell by cell against the Flow Designer copy · Checked 2026-09-05
11. 11
    Function code is written with language-specific static analysis and the article never states what that analysis checks for.

    Build and manage flows with Flow Designer · Create and manage functions, capability bullet list · Checked 2026-09-05
12. 12
    Supervisors as well as administrators can manage functions, gated by a Function setting in the user profile that can be set to Edit, View or None.

    Build and manage flows with Flow Designer · Create and manage functions, FAQ on who can manage functions · Checked 2026-09-05
13. 13
    The system limits article contains no occurrence of the word function anywhere in its text, tables or headings, so it corroborates none of the published function limits.

    System limits in Webex Contact Center · Whole article, exhaustive search · Checked 2026-09-05

Documents

Cite this page

WarmTransfer. (2026, September 5). Author-written functions in Flow Designer. WarmTransfer. https://warmtransfer.net/knowledge/wxcc-flow-functions

@misc{warmtransfer-wxcc-flow-functions,
  title  = {Author-written functions in Flow Designer},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/wxcc-flow-functions},
  note   = {Verified 2026-09-05}
}