Page Data

The JSON the page owns, and the store it becomes at runtime.

How a path addresses a value.

A path is a dot-separated route into the page's JSON. Bindings, units, reactions and the API all speak the same syntax.

PathReads
$The whole store.
titleA top-level key.
score.homeA nested value.
items.0.nameThe name of the first array element.
sheets.<sheetId>.<tab>.<A1>A bound spreadsheet cell.