Getting error in setAttributeVal function

Summary:

Hello

How do I use setAttributeVal function using CPQJS?

Content (required):

For example, I want to use the function as follows:

CPQJS.setAttributeVal("opptyOwner_ZipCode_quote", "54018")

But it gives me a compilation error - The folder CPQJS doesn't exist

I guess I need to put some JS code in the file manager and retrieve it. But not sure how to proceed.

A small example will be very helpful to me

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