addProductsToCollection( )

Adds products by ID to a product collection.

The addProductsToCollection() function returns a Promise that resolves when the products with the given IDs are added to a product collection with a given ID.

You can add multiple products to a collection at one time by delimiting the list of products with commas.

With this function, you can only add existing products to a collection. You cannot use the addProductsToCollection() function to create a product. See createProduct() to add a product to the store.