itemKey
An itemKey is a value used to uniquely identify an item within a collection. It provides a stable reference that remains linked to the item through updates, moves, or deletions. In data models, an itemKey often corresponds to a primary key in a database, typically a numeric identifier or a globally unique identifier (GUID/UUID). It can be a natural key derived from the data or a surrogate key introduced to ensure stability and immutability.
In user interface frameworks, itemKey is used to track items in lists so that the rendering engine
In data structures and APIs, the itemKey functions as the map key or index used for efficient
Design considerations for itemKey include ensuring uniqueness, immutability, and stability over time. Surrogate keys are often
Common pitfalls include changing a key after creation, which can break references or undo prior updates; duplicate
See also: primary key, surrogate key, natural key, key-value store, and hash function.