The
$watchCollection()function is a sort-of mid-ground between the two$watch()configurations above. It’s more in-depth than the vanilla $watch() function; but, it’s not nearly as expensive as the deep-equality$watch()function. Like the$watch()function, the$watchCollection()works by comparing physical object references; however, unlike the$watch()function, the$watchCollection()goes one-level deep and performs an additional, shallow reference check of the top level items in the collection.
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