Slot Types

Overview

Seizen Table provides 5 slot types where plugins can render components. Each slot serves a different purpose in the table layout.

type SlotType = "side-panel" | "header" | "footer" | "cell" | "inline-row";

side-panel

IDE-style vertical tab side panel on the left or right side of the table.

Use Cases

Navigation panels (column controls, filters)
Detail views (row details, inspectors)
Tool panels (bulk actions, export options)

Configuration

interface SidePanelSlot {
  position: "left-sider" | "right-sider";
  header?: string | ReactNode;
  render: () => ReactNode;
}

position

'left-sider' | 'right-sider'

required

Panel position relative to the table

header

string | ReactNode

Header content displayed at the top of the panel

render

() => ReactNode

required

Render function for panel content. Use usePluginArgs() inside to access configuration.

Example

import { definePlugin, usePluginContext } from "@izumisy/seizen-table/plugin";
import { z } from "zod";

function FilterPanel() {
  const { columns } = usePluginContext();
  return (
    <div style={{ padding: 16 }}>
      <h3>Filters</h3>
      {columns.map((col) => (
        <div key={col.key}>{col.header}</div>
      ))}
    </div>
  );
}

export const FilterPlugin = definePlugin({
  id: "filter",
  name: "Filter",
  args: z.object({ width: z.number().default(320) }),
  slots: {
    sidePanel: {
      position: "right-sider",
      header: "Filters",
      render: FilterPanel,
    },
  },
});

Visual Reference

┌────────────┬─────────────────────┬────────────┐
│ Left Panel │      Table          │ Right Panel│
│            │                     │            │
│ (optional) │  ┌──────────────┐   │ (optional) │
│            │  │ Table Header │   │            │
│            │  ├──────────────┤   │            │
│            │  │ Table Body   │   │            │
│            │  └──────────────┘   │            │
└────────────┴─────────────────────┴────────────┘

Renders between the table header and body rows.

Use Cases

Global search bars
Filter chips display
Action toolbars
Notification banners

Configuration

interface HeaderSlot {
  render: () => ReactNode;
}

render

() => ReactNode

required

Render function for header content. Use usePluginArgs() inside to access configuration.

Example

import { definePlugin, usePluginContext } from "@izumisy/seizen-table/plugin";
import { z } from "zod";

function GlobalSearchHeader() {
  const { table } = usePluginContext();

  return (
    <div style={{ padding: "8px 16px", borderBottom: "1px solid #e5e7eb" }}>
      <input
        type="text"
        placeholder="Search..."
        onChange={(e) => table.setGlobalFilter(e.target.value)}
        style={{ width: "100%" }}
      />
    </div>
  );
}

export const GlobalSearchPlugin = definePlugin({
  id: "global-search",
  name: "Global Search",
  args: z.object({}),
  slots: {
    header: {
      render: GlobalSearchHeader,
    },
  },
});

Visual Reference

┌─────────────────────────────┐
│      Table Header           │
├─────────────────────────────┤
│  Header Slot (your plugin)  │  ← Renders here
├─────────────────────────────┤
│      Table Body             │
│                             │
└─────────────────────────────┘

Renders below the table body.

Use Cases

Pagination controls
Summary statistics
Bulk action buttons
Status indicators

Configuration

interface FooterSlot {
  render: () => ReactNode;
}

render

() => ReactNode

required

Render function for footer content. Use usePluginArgs() inside to access configuration.

Example

import { definePlugin, usePluginContext } from "@izumisy/seizen-table/plugin";
import { z } from "zod";

function TableFooter() {
  const { data, selectedRows } = usePluginContext();

  return (
    <div style={{ padding: "8px 16px", borderTop: "1px solid #e5e7eb" }}>
      <p>
        {selectedRows.length} of {data.length} rows selected
      </p>
    </div>
  );
}

export const FooterPlugin = definePlugin({
  id: "footer",
  name: "Footer",
  args: z.object({}),
  slots: {
    footer: {
      render: TableFooter,
    },
  },
});

Visual Reference

┌─────────────────────────────┐
│      Table Header           │
├─────────────────────────────┤
│      Table Body             │
│                             │
├─────────────────────────────┤
│  Footer Slot (your plugin)  │  ← Renders here
└─────────────────────────────┘

cell

Custom cell renderer applied to all columns. First matching plugin wins.

Use Cases

Custom data type renderers (dates, currency, badges)
Conditional formatting
Interactive cell components
Cell-level actions

Configuration

interface CellSlot<TData = unknown> {
  render: (
    cell: Cell<TData, unknown>,
    column: Column<TData, unknown>,
    row: Row<TData>
  ) => ReactNode;
}

render

(cell, column, row) => ReactNode

required

Render function receiving TanStack Table primitives. Return null or undefined to fall through to the next plugin or default renderer.

Example: Custom Date Renderer

import { definePlugin } from "@izumisy/seizen-table/plugin";
import { z } from "zod";
import type { Cell, Column, Row } from "@tanstack/react-table";

function DateCellRenderer(
  cell: Cell<unknown, unknown>,
  column: Column<unknown, unknown>,
  row: Row<unknown>
) {
  const value = cell.getValue();
  const meta = column.columnDef.meta;

  // Only render if this is a date column
  if (meta?.filterType !== "date") return null;

  const date = value instanceof Date ? value : new Date(String(value));
  return <span>{date.toLocaleDateString()}</span>;
}

export const DateFormatterPlugin = definePlugin({
  id: "date-formatter",
  name: "Date Formatter",
  args: z.object({}),
  slots: {
    cell: {
      render: DateCellRenderer,
    },
  },
});

Example: Conditional Badge

function StatusCellRenderer(
  cell: Cell<unknown, unknown>,
  column: Column<unknown, unknown>
) {
  if (column.id !== "status") return null;

  const status = String(cell.getValue());
  const colors = {
    active: "green",
    inactive: "gray",
    pending: "yellow",
  };

  return (
    <span
      style={{
        padding: "4px 8px",
        borderRadius: "4px",
        backgroundColor: colors[status] || "gray",
        color: "white",
      }}
    >
      {status}
    </span>
  );
}

Fallthrough Behavior

Only the first plugin that returns a non-null value will render the cell. Return null or undefined to allow other plugins or the default renderer to handle the cell.

// ✅ Good: Returns null for non-matching columns
function MyRenderer(cell, column) {
  if (column.id !== "status") return null; // Falls through
  return <Badge value={cell.getValue()} />;
}

// ❌ Bad: Always renders, blocking other plugins
function MyRenderer(cell, column) {
  return <span>{String(cell.getValue())}</span>; // No fallthrough!
}

inline-row

Renders below a specific row when opened. First matching plugin wins.

Use Cases

Expandable row details
Nested tables
Related data display
Inline forms for editing

Configuration

interface InlineRowSlot<TData = unknown> {
  render: (row: Row<TData>) => ReactNode;
}

render

(row: Row<TData>) => ReactNode

required

Render function receiving the parent row. Return null or undefined to fall through to the next plugin.

Example: Row Expansion

import { definePlugin, usePluginContext } from "@izumisy/seizen-table/plugin";
import { z } from "zod";
import type { Row } from "@tanstack/react-table";

function InlineRowDetail(row: Row<unknown>) {
  const rowData = row.original as Record<string, unknown>;

  return (
    <div style={{ padding: 16, backgroundColor: "#f9fafb" }}>
      <h4>Details for Row {row.id}</h4>
      <pre>{JSON.stringify(rowData, null, 2)}</pre>
    </div>
  );
}

export const InlineDetailPlugin = definePlugin({
  id: "inline-detail",
  name: "Inline Detail",
  args: z.object({}),
  slots: {
    inlineRow: {
      render: InlineRowDetail,
    },
  },
});

Usage with Row Expansion

import { useSeizenTable } from "@izumisy/seizen-table";

function MyTable() {
  const table = useSeizenTable({
    data,
    columns,
    plugins: [InlineDetailPlugin.configure({})],
    enableRowExpansion: true, // Enable row expansion
  });

  return (
    <SeizenTable.Root table={table}>
      <SeizenTable.Content />
    </SeizenTable.Root>
  );
}

Visual Reference

┌─────────────────────────────┐
│  Row 1                      │
├─────────────────────────────┤  ← Row expanded
│  Inline Row Slot            │  ← Your plugin renders here
├─────────────────────────────┤
│  Row 2                      │
├─────────────────────────────┤
│  Row 3                      │
└─────────────────────────────┘

Slot Priority

When multiple plugins use the same slot:

side-panel: Only one plugin can occupy each position (left-sider or right-sider). The first plugin wins.
header/footer: All plugins render in order they appear in the plugins array.
cell/inline-row: First plugin that returns a non-null value wins. Return null to allow fallthrough.

Accessing Context in Slots

All slot render functions can use plugin context hooks:

import { usePluginContext, usePluginArgs } from "@izumisy/seizen-table/plugin";

function MySlotComponent() {
  // Access table instance, data, events
  const { table, data, selectedRows, useEvent } = usePluginContext();

  // Access validated plugin configuration
  const args = usePluginArgs<MyConfigType>();

  // Subscribe to events
  useEvent("selection-change", (rows) => {
    console.log("Selection changed", rows);
  });

  return <div>...</div>;
}

definePlugin - Create plugins with slots
usePluginContext - Access table context in slots
usePluginArgs - Access plugin configuration

Core API

Plugin API

Overview

side-panel

Use Cases

Configuration

Example

Visual Reference

header

Use Cases

Configuration

Example

Visual Reference

footer

Use Cases

Configuration

Example

Visual Reference

cell

Use Cases

Configuration

Example: Custom Date Renderer

Example: Conditional Badge

Fallthrough Behavior

inline-row

Use Cases

Configuration

Example: Row Expansion

Usage with Row Expansion

Visual Reference

Slot Priority

Accessing Context in Slots

Build docs developers (and LLMs) love

Core API

Plugin API

Documentation Index

​Overview

​side-panel

​Use Cases

​Configuration

​Example

​Visual Reference

​header

​Use Cases

​Configuration

​Example

​Visual Reference

​footer

​Use Cases

​Configuration

​Example

​Visual Reference

​cell

​Use Cases

​Configuration

​Example: Custom Date Renderer

​Example: Conditional Badge

​Fallthrough Behavior

​inline-row

​Use Cases

​Configuration

​Example: Row Expansion

​Usage with Row Expansion

​Visual Reference

​Slot Priority

​Accessing Context in Slots

​Related

Build docs developers (and LLMs) love

Overview

side-panel

Use Cases

Configuration

Example

Visual Reference

header

Use Cases

Configuration

Example

Visual Reference

footer

Use Cases

Configuration

Example

Visual Reference

cell

Use Cases

Configuration

Example: Custom Date Renderer

Example: Conditional Badge

Fallthrough Behavior

inline-row

Use Cases

Configuration

Example: Row Expansion

Usage with Row Expansion

Visual Reference

Slot Priority

Accessing Context in Slots

Related