table-state

# Preact table state Before starting, run `intent load @tanstack/table-core#table-state` for shared ownership, initialization, updates, and resets. State repair does not require loading setup guidance. ## Read reactive state `useTable` selects all registered state by default. Its optional second-argument selector controls rerenders and the shape of `table.state`. `table.atoms.<slice>.get()` and `table.store.state` are current snapshots, not Preact subscriptions. Use selected `table.state` in the owner render. For narrower boundaries, use `table.Subscribe` or `useSelector` from `@tanstack/preact-store`. Without `source`, `table.Subscribe` selects from `table.store`; with `source`, it subscribes to that atom or store. Start with the default selector until render cost requires narrowing. ## Control a slice Keep features, columns, and data stable. Register the feature that owns the controlled slice. This example controls pagination without adding client row processing: ```tsx import { useState } from 'preact/hooks' import { rowPaginationFeature, tableFeatures, useTable, type PaginationState, } from '@tanstack/preact-table' const features = tableFeatures({ rowPaginationFeature }) const columns = [{ accessorKey: 'name' }] const data = [{ name: 'Ada' }] export function PageControl() { const [pagination, setPagination] = useState<PaginationState>({ pageIndex: 0, pageSize: 20, }) const table = useTable({ features, columns, data, state: { pagination }, onPaginationChange: setPagination, }) return ( <button onClick={() => table.setPageSize(50)}> {table.state.pagination.pageSize} rows per page </button> ) } ``` The Preact setter accepts both a value and a functional updater. Supply the current `state.pagination` together with `onPaginationChange`; a callback alone does not keep the table synchronized. For an externally owned atom, create it with `useCreateAtom` from `@tanstack/preact-store`, pass it in `atoms.<slice>`, and subscribe with `useSelector` where other UI needs its value. ## Reactive boundaries Use native `@tanstack/preact-store` bindings. A narrowed selector must include every state slice used by rendered builder methods, or those consumers need their own subscription. For external-atom examples, selector dependencies, or fine-grained boundaries, read [reactivity details](references/reactivity.md). If this task changes processing features, run `intent load @tanstack/table-core#table-features` and read the relevant feature references. ## API discovery Inspect `node_modules/@tanstack/preact-table/dist/useTable.d.ts` and `Subscribe.d.ts`, plus the installed `@tanstack/preact-store` declarations for atom hooks.