Key attributes and methods (expression reference)

When you access a Key object, you can get time, index, and value properties from it. For example, the following expression gives you the value of the third Position keyframe: position.key(3).value.

The following expression, when written on an Opacity property with keyframes, ignores the keyframe values and uses only the placement of the keyframes in time to determine where a flash should occur:

  d = Math.abs(time - nearestKey(time).time); 
  easeOut(d, 0, .1, 100, 0)

value: Return type: Number or Array.
Returns the value of the keyframe.
time: Return type: Number.
Returns the time of the keyframe.
index: Return type: Number.
Returns the index of the keyframe.