React Example: Column Groups

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import * as React from 'react' import ReactDOM from 'react-dom/client' import './index.css' import { createColumnHelper, flexRender, getCoreRowModel, useReactTable, } from '@tanstack/react-table' type Person = { firstName: string lastName: string age: number visits: number status: string progress: number } const defaultData: Person[] = [ { firstName: 'tanner', lastName: 'linsley', age: 24, visits: 100, status: 'In Relationship', progress: 50, }, { firstName: 'tandy', lastName: 'miller', age: 40, visits: 40, status: 'Single', progress: 80, }, { firstName: 'joe', lastName: 'dirte', age: 45, visits: 20, status: 'Complicated', progress: 10, }, ] const columnHelper = createColumnHelper<Person>() const columns = [ columnHelper.group({ id: 'hello', header: () => <span>Hello</span>, // footer: props => props.column.id, columns: [ columnHelper.accessor('firstName', { cell: info => info.getValue(), footer: props => props.column.id, }), columnHelper.accessor(row => row.lastName, { id: 'lastName', cell: info => info.getValue(), header: () => <span>Last Name</span>, footer: props => props.column.id, }), ], }), columnHelper.group({ header: 'Info', footer: props => props.column.id, columns: [ columnHelper.accessor('age', { header: () => 'Age', footer: props => props.column.id, }), columnHelper.group({ header: 'More Info', columns: [ columnHelper.accessor('visits', { header: () => <span>Visits</span>, footer: props => props.column.id, }), columnHelper.accessor('status', { header: 'Status', footer: props => props.column.id, }), columnHelper.accessor('progress', { header: 'Profile Progress', footer: props => props.column.id, }), ], }), ], }), ] function App() { const [data, _setData] = React.useState(() => [...defaultData]) const rerender = React.useReducer(() => ({}), {})[1] const table = useReactTable({ data, columns, getCoreRowModel: getCoreRowModel(), }) return ( <div className="p-2"> <table> <thead> {table.getHeaderGroups().map(headerGroup => ( <tr key={headerGroup.id}> {headerGroup.headers.map(header => ( <th key={header.id} colSpan={header.colSpan}> {header.isPlaceholder ? null : flexRender( header.column.columnDef.header, header.getContext() )} </th> ))} </tr> ))} </thead> <tbody> {table.getRowModel().rows.map(row => ( <tr key={row.id}> {row.getVisibleCells().map(cell => ( <td key={cell.id}> {flexRender(cell.column.columnDef.cell, cell.getContext())} </td> ))} </tr> ))} </tbody> <tfoot> {table.getFooterGroups().map(footerGroup => ( <tr key={footerGroup.id}> {footerGroup.headers.map(header => ( <th key={header.id} colSpan={header.colSpan}> {header.isPlaceholder ? null : flexRender( header.column.columnDef.footer, header.getContext() )} </th> ))} </tr> ))} </tfoot> </table> <div className="h-4" /> <button onClick={() => rerender()} className="border p-2"> Rerender </button> </div> ) } const rootElement = document.getElementById('root') if (!rootElement) throw new Error('Failed to find the root element') ReactDOM.createRoot(rootElement).render( <React.StrictMode> <App /> </React.StrictMode> ) 

import * as React from 'react' import ReactDOM from 'react-dom/client' import './index.css' import { createColumnHelper, flexRender, getCoreRowModel, useReactTable, } from '@tanstack/react-table' type Person = { firstName: string lastName: string age: number visits: number status: string progress: number } const defaultData: Person[] = [ { firstName: 'tanner', lastName: 'linsley', age: 24, visits: 100, status: 'In Relationship', progress: 50, }, { firstName: 'tandy', lastName: 'miller', age: 40, visits: 40, status: 'Single', progress: 80, }, { firstName: 'joe', lastName: 'dirte', age: 45, visits: 20, status: 'Complicated', progress: 10, }, ] const columnHelper = createColumnHelper<Person>() const columns = [ columnHelper.group({ id: 'hello', header: () => <span>Hello</span>, // footer: props => props.column.id, columns: [ columnHelper.accessor('firstName', { cell: info => info.getValue(), footer: props => props.column.id, }), columnHelper.accessor(row => row.lastName, { id: 'lastName', cell: info => info.getValue(), header: () => <span>Last Name</span>, footer: props => props.column.id, }), ], }), columnHelper.group({ header: 'Info', footer: props => props.column.id, columns: [ columnHelper.accessor('age', { header: () => 'Age', footer: props => props.column.id, }), columnHelper.group({ header: 'More Info', columns: [ columnHelper.accessor('visits', { header: () => <span>Visits</span>, footer: props => props.column.id, }), columnHelper.accessor('status', { header: 'Status', footer: props => props.column.id, }), columnHelper.accessor('progress', { header: 'Profile Progress', footer: props => props.column.id, }), ], }), ], }), ] function App() { const [data, _setData] = React.useState(() => [...defaultData]) const rerender = React.useReducer(() => ({}), {})[1] const table = useReactTable({ data, columns, getCoreRowModel: getCoreRowModel(), }) return ( <div className="p-2"> <table> <thead> {table.getHeaderGroups().map(headerGroup => ( <tr key={headerGroup.id}> {headerGroup.headers.map(header => ( <th key={header.id} colSpan={header.colSpan}> {header.isPlaceholder ? null : flexRender( header.column.columnDef.header, header.getContext() )} </th> ))} </tr> ))} </thead> <tbody> {table.getRowModel().rows.map(row => ( <tr key={row.id}> {row.getVisibleCells().map(cell => ( <td key={cell.id}> {flexRender(cell.column.columnDef.cell, cell.getContext())} </td> ))} </tr> ))} </tbody> <tfoot> {table.getFooterGroups().map(footerGroup => ( <tr key={footerGroup.id}> {footerGroup.headers.map(header => ( <th key={header.id} colSpan={header.colSpan}> {header.isPlaceholder ? null : flexRender( header.column.columnDef.footer, header.getContext() )} </th> ))} </tr> ))} </tfoot> </table> <div className="h-4" /> <button onClick={() => rerender()} className="border p-2"> Rerender </button> </div> ) } const rootElement = document.getElementById('root') if (!rootElement) throw new Error('Failed to find the root element') ReactDOM.createRoot(rootElement).render( <React.StrictMode> <App /> </React.StrictMode> )