WOLFRAM

Wolfram Language & System Documentation Center

$DynamicEvaluation

is a symbol whose value is True if it is evaluated as part of the evaluation of a Dynamic.

Examples  
Basic Examples  
Applications  
See Also
Tech Notes
Related Guides
History
Cite this Page

$DynamicEvaluation

$DynamicEvaluation

is a symbol whose value is True if it is evaluated as part of the evaluation of a Dynamic.

Examples

open all close all

Basic Examples  (2)

Detect whether an evaluation is occurring inside Dynamic:

Wolfram Language code: {$DynamicEvaluation, Dynamic[$DynamicEvaluation]}

The evaluations are inside a Dynamic for Manipulate:

Wolfram Language code: Manipulate[$DynamicEvaluation, {x, None}]

Applications  (1)

A function that returns messages causes Dynamic values to pink:

Wolfram Language code: inverse1[x_] := 1 / x; inverse1[0]
Wolfram Language code: DynamicModule[{x = 0}, {Slider[Dynamic[x]], Dynamic[inverse1[x]]}, SaveDefinitions -> True]

Use $DynamicEvaluation to print the message in regular evaluations while suppressing the pink box in Dynamic:

Wolfram Language code: inverse2[x_] := If[$DynamicEvaluation, Quiet, Identity][1 / x]; inverse2[0]
Wolfram Language code: DynamicModule[{x = 0}, {Slider[Dynamic[x]], Dynamic[inverse2[x]]}, SaveDefinitions -> True]
Wolfram Research (2007), $DynamicEvaluation, Wolfram Language function, https://reference.wolfram.com/language/ref/$DynamicEvaluation.html.

Text

Wolfram Research (2007), $DynamicEvaluation, Wolfram Language function, https://reference.wolfram.com/language/ref/$DynamicEvaluation.html.

CMS

Wolfram Language. 2007. "$DynamicEvaluation." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/$DynamicEvaluation.html.

APA

Wolfram Language. (2007). $DynamicEvaluation. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$DynamicEvaluation.html

BibTeX

@misc{reference.wolfram_2026_$dynamicevaluation, author="Wolfram Research", title="{$DynamicEvaluation}", year="2007", howpublished="\url{https://reference.wolfram.com/language/ref/$DynamicEvaluation.html}", note=[Accessed: 13-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_$dynamicevaluation, organization={Wolfram Research}, title={$DynamicEvaluation}, year={2007}, url={https://reference.wolfram.com/language/ref/$DynamicEvaluation.html}, note=[Accessed: 13-June-2026]}