BUILT-IN MATHEMATICA SYMBOL

CellDynamicExpression

CellDynamicExpression
is an option for cells that specifies an expression to be dynamically updated whenever the cell is visible on-screen.

Details Details

CellDynamicExpression is typically used with RuleDelayed.
CellDynamicExpression->Dynamic[expr] causes the expression to be tracked and updated in the usual way, except that expr is not displayed anywhere.
CellDynamicExpression may not trigger dynamic updates if the cell is scrolled off-screen or inside of a closed cell group.

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