# Selector Family

A function that creates related selectors from parameter keys.

Source: docs/source/concepts/selector-family.md
Packages: atom.io
Related: selector, atom-family, join

A selector family creates parameterized derived state. Each key gets its own
selector token, while the declaration describes how every member should compute
or update its value.

Selector families are a good fit for derived values tied to dynamic entities:
one display label per item, one SVG path per id, or one filtered query per key.

Use a selector family when the derived state depends on both reactive inputs and
a stable parameter.