Table State

This skill builds on @tanstack/table-core#core and getting-started. Solid-backed atom reads react only inside a tracked scope; there is no React-style selected table.state object.

State Mental Model

TanStack Table is primarily a state coordinator. Let it own state unless another subsystem needs the value. Without initialState, atoms, state, or on[State]Change, all registered slices are internal.

• table.baseAtoms are internal writable atoms created from initial state.
• table.atoms are readonly derived atoms that resolve the active owner of each slice.
• table.store combines registered atoms into one readonly flat store.

The Solid adapter backs core atoms with Solid signals and memos. An atom .get() participates in dependency tracking only inside JSX, createMemo, createEffect, or another tracked owner. State is feature-based: no rowPaginationFeature means no pagination state, atom, option, or method. Keep features and columns stable, and expose changing data through a reactive getter rather than rebuilding model inputs in a tracked computation.

Setup

import { createMemo } from 'solid-js'

const table = createTable({
  features,
  columns,
  get data() {
    return data()
  },
})
const selectedCount = createMemo(
  () => Object.keys(table.atoms.rowSelection.get()).length,
)
return <output>{selectedCount()}</output>

Core Patterns

Control with a native signal

const [sorting, setSorting] = createSignal([])
const table = createTable({
  features,
  columns,
  get data() {
    return data()
  },
  get state() {
    return { sorting: sorting() }
  },
  onSortingChange: setSorting,
})

Solid signal setters already accept either a value or an updater function, so pass the setter directly. Wrap it only when adding validation, transformation, or a side effect:

onSortingChange: (updater) =>
  setSorting((old) => {
    const next = typeof updater === 'function' ? updater(old) : updater
    logSortingChange(next)
    return next
  })

Own a slice with an external atom

import { createAtom } from '@tanstack/solid-store'
const pagination = createAtom({ pageIndex: 0, pageSize: 20 })
const table = createTable({ features, columns, data, atoms: { pagination } })

Choose State Ownership

Use one owner for each slice:

• Keep state internal and use feature methods for ordinary table-local interaction.
• Use initialState for a starting/reset value. Later changes to that object do not reset state.
• Prefer a stable @tanstack/solid-store atom through atoms when state is shared; feature methods write it directly.
• Use a Solid signal through a reactive state getter plus on[State]Change for simple controlled state. Resolve raw values and updater functions.

External atoms take precedence over controlled state, which syncs into the internal base atom. Do not configure two owners for one slice. The global v8 onStateChange option is gone; observe table.store when all state changes matter.

Initialize, Update, and Reset

Prefer feature APIs such as table.setSorting, table.nextPage, column.toggleVisibility, and row.toggleSelected. Write table.baseAtoms only as a low-level escape hatch for internally owned state, and write the supplied atom when external atoms own the slice.

table.resetSorting()
table.resetPagination()
table.resetPagination(true)

Feature resets use table.initialState unless true requests the feature default, and they can update an external owner. Core table.reset() resets internal base atoms only. Use PaginationState or another slice type for external state; use TableState<typeof features> for the complete feature-inferred state.

Common Mistakes

HIGH Reading outside a tracked scope

Wrong:

const page = table.atoms.pagination.get().pageIndex
setInterval(() => console.log(page), 1000)

Correct:

const page = createMemo(() => table.atoms.pagination.get().pageIndex)
setInterval(() => console.log(page()), 1000)

An atom read only establishes Solid dependencies inside JSX, a memo, an effect, or another tracked owner.

Source: docs/framework/solid/guide/table-state.md

MEDIUM Adding broad React-style rerenders

Wrong:

createEffect(() => {
  JSON.stringify(table.store.state)
  forceUpdate()
})

Correct:

const count = createMemo(
  () => Object.keys(table.atoms.rowSelection.get()).length,
)

Solid should track the narrow atom reads actually used by the computation.

Source: packages/solid-table/src/createTable.ts

API Discovery

Inspect node_modules/@tanstack/solid-table/dist/createTable.d.ts and reactivity.d.ts; state slice definitions and atom precedence are in installed @tanstack/table-core/dist/.