# Context variable not displayed in sidebar when set to undefined

**URL:** https://discourse.nodered.org/t/context-variable-not-displayed-in-sidebar-when-set-to-undefined/12622
**Category:** General
**Created:** [26 June 2019 16:20 UTC](https://discourse.nodered.org/t/context-variable-not-displayed-in-sidebar-when-set-to-undefined/12622 "2019-06-26T16:20:52Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![hotNipi](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/hotnipi/32/383_2.png) [@hotNipi](https://discourse.nodered.org/u/hotNipi)
#### Post date: [26 June 2019 16:24 UTC](https://discourse.nodered.org/t/context-variable-not-displayed-in-sidebar-when-set-to-undefined/12622/3 "2019-06-26T16:24:00Z")

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See this thread: [Delete persistent flow context variable](https://discourse.nodered.org/t/delete-persistent-flow-context-variable/3121/6) It reveals all the secrets of context variable manipulations 🙂

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_[View the full topic](https://discourse.nodered.org/t/context-variable-not-displayed-in-sidebar-when-set-to-undefined/12622)._