You should declare a variable named rawCatalogCards.<< error happening, even declaring with (const, let , var) still showing like that. (You should declare a variable named rawCatalogCards.)
Your code so far
// User Editable Region
const rawCatalogCards = [
"From a Buick 8 | King, Stephen | 2002 | Shelf K7",
"The Shining | King, Stephen | 1977 | Shelf K1"
]
// User Editable Region
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