What is an expression After Effects?
After Effects expressions are a motion designer's secret weapon.
Expression or script After Effects ?
There are two approaches to programming in Adobe After Effects: expressions and scripts. But what is the difference?
The expressions are associated with layer properties and evaluated during rendering. While scripts are external files (.jsx) that are evaluated at the execution of the script.
Here is the Alibaba cave of Duckmotion's favorite After Effects expressions Wiggle, Scale, Camera Ref, Loop, Time, Checkbox, Shadowtrace, Stroke,... This database is at your disposal for free and easily accessible.
To be used with care, attention and delicacy.