Adobe 65009963 Scripting Manual page 139

JavaScript Reference
Property valueAtTime() method
a pp .p r o j e c t .i te m (i nd e x) .laye r( in de x) .p r op e rt y S p ec . v a l u e A tT i m e ( t i m e , p r eE x p r e s s i o n )
Description
The value of the named property as evaluated at the specified time.
Note that the type of value returned is not made explicit; it will be of a different type, depending on the
property evaluated.
Parameters
t im e
p r e E xp r e ss i o n
Returns
A value appropriate for the type of the property (see "Property propertyValueType attribute" on page 131).
The time in seconds; a floating-point value. The beginning of the composition is 0.
If the property has an expression and this is true, return the value for the specified time without
applying the expression to it. When false, return the result of evaluating the expression for the
specified time.
Ignored if the property does not have an associated expression.
Property object
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