In the context of data or an object wrapper around that data, the value is the primitive value that the object wrapper contains. In the context of a variable or property, the value can be either a primitive or an object reference.

In the context of CSS property values, there are specified, computed, and actual values. The final value for every CSS property applied to every element and pseudo-element is the result of a four-step calculation: the value is determined through specification (the "specified value", then resolved into a value that is used for inheritance (the "computed value"), then converted into an absolute value if necessary (the "used value"), and finally transformed according to the limitations of the local environment (the "actual value").

For CSS data types, see CSS values and units.

See also