eval (Execute calculation expression)

$eval can be used to execute a calculation expression at runtime.

The expression is determined and calculated at runtime. This function is only needed to execute an expression which can be read from another place and cannot be formulated statically.

Tooltip

Syntax: $eval(expression[,host])

Parameter	Description
expression	The expression to be calculated as text, e.g. $el(3) or \{data field\}.
host	Optional, the object to be used for the calculation expression. If the host parameter is not specified, $input is used.

Delivers the result of the expression.

Example: $eval({fieldThatContainsAnExpression}) – reads the value of the field and evaluates it as an expression.

Syntax

$eval(expression[,host])

Parameter

Return value

The result of the expression

Example

{
  "colorExpression": "$getStyleVar(#FE6601)"
}