NotebookDynamicExpression
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NotebookDynamicExpression
is an option for notebooks that specifies an expression to be dynamically updated whenever that notebook is visible.
Details

- NotebookDynamicExpression->Dynamic[expr] causes the expression to be tracked and updated in the usual way, except that expr is not displayed anywhere.
Examples
open allclose allBasic Examples (1)Summary of the most common use cases
Properties & Relations (1)Properties of the function, and connections to other functions
Dynamic can be omitted from the right-hand side if :> is used:

https://wolfram.com/xid/0mlfau5uk1ua-m6ytc

Similarly, Dynamic can be omitted from the right-hand side if := is used in CurrentValue:

https://wolfram.com/xid/0mlfau5uk1ua-hgvkzn
As with any other Dynamic expression, Refresh may be used to control reevaluation:

https://wolfram.com/xid/0mlfau5uk1ua-ca3f5k
Wolfram Research (2010), NotebookDynamicExpression, Wolfram Language function, https://reference.wolfram.com/language/ref/NotebookDynamicExpression.html.
Text
Wolfram Research (2010), NotebookDynamicExpression, Wolfram Language function, https://reference.wolfram.com/language/ref/NotebookDynamicExpression.html.
Wolfram Research (2010), NotebookDynamicExpression, Wolfram Language function, https://reference.wolfram.com/language/ref/NotebookDynamicExpression.html.
CMS
Wolfram Language. 2010. "NotebookDynamicExpression." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NotebookDynamicExpression.html.
Wolfram Language. 2010. "NotebookDynamicExpression." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NotebookDynamicExpression.html.
APA
Wolfram Language. (2010). NotebookDynamicExpression. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NotebookDynamicExpression.html
Wolfram Language. (2010). NotebookDynamicExpression. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NotebookDynamicExpression.html
BibTeX
@misc{reference.wolfram_2025_notebookdynamicexpression, author="Wolfram Research", title="{NotebookDynamicExpression}", year="2010", howpublished="\url{https://reference.wolfram.com/language/ref/NotebookDynamicExpression.html}", note=[Accessed: 08-July-2025
]}
BibLaTeX
@online{reference.wolfram_2025_notebookdynamicexpression, organization={Wolfram Research}, title={NotebookDynamicExpression}, year={2010}, url={https://reference.wolfram.com/language/ref/NotebookDynamicExpression.html}, note=[Accessed: 08-July-2025
]}