With that covered, what about in the case of the wiggle expression? With a wiggle, we’re instructing the property, whether the scale, opacity, or position, to wiggle within the set parameters. An example of a script-not an expression. ![]() For example, this script tells the application (the application being After Effects) to position the anchor point of this layer to the center, the right, or the top. Now, unlike a script, which tells the application to do something, an expression will inform the individual property to do something. First, before we look at what the wiggle expression does, we must ask: What is an expression? An expression is a piece of JavaScript code that you can insert into the animated properties of your media.
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