igniteui-wc-migrate-grid-lite-to-premium

name	igniteui-wc-migrate-grid-lite-to-premium
description	Step-by-step migration guide from igniteui-grid-lite (IgcGridLite) to the premium igniteui-webcomponents-grids (IgcGridComponent), covering every import, class name, HTML tag, property, event, template, sorting, filtering, and theming API change.
user-invocable	true

Migrate from Grid Lite to Premium Data Grid (Web Components)

Purpose

This skill automates the migration from Grid Lite (igniteui-grid-lite, MIT licensed, <igc-grid-lite>) to the Premium Data Grid (igniteui-webcomponents-grids, commercially licensed, <igc-grid>). Use it when a project outgrows Grid Lite's read-only capabilities and needs enterprise features such as editing, selection, paging, grouping, summaries, Excel export, or state persistence.

MANDATORY AGENT PROTOCOL

DO NOT write any code from memory. Grid APIs change between versions.

Before producing migration code:

1. Identify the current Grid Lite usage - read the user's existing TypeScript and HTML files to understand their column configuration, cell templates, data binding, and any dataPipelineConfiguration usage.
2. Use the MCP server - call mcp_igniteui-cli_get_api_reference or mcp_igniteui-cli_get_doc (framework: webcomponents) to verify current API details when in doubt.
3. Only then produce output - base all code on verified references, not memory.

---

When to Migrate

Migrate from Grid Lite to the Premium Grid when the user needs any of these features:

Required Feature	Grid Lite	Premium Grid
Cell / Row / Batch editing	No	Yes
Row adding / deleting	No	Yes
Row / Cell / Column selection	No	Yes
Paging (client or remote)	No	Yes
GroupBy	No	Yes
Summaries (built-in & custom)	No	Yes
Column pinning	No	Yes
Column moving	No	Yes
Master-Detail rows	No	Yes
Export (Excel / CSV)	No	Yes
Toolbar	No	Yes
State persistence	No	Yes
Advanced filtering	No	Yes
Action strip	No	Yes
Row drag	No	Yes
Clipboard support	No	Yes
Cell merging	No	Yes

IMPORTANT: The upgrade path from Grid Lite is always to IgcGridComponent (<igc-grid>). Never recommend a different component type as a substitute.

---

Step 1 - Install / Verify the Premium Package

Grid Lite uses the separate igniteui-grid-lite npm package. The Premium Grid ships in igniteui-webcomponents-grids (or @infragistics/igniteui-webcomponents-grids for licensed builds).

AGENT INSTRUCTION: Check package.json to determine which package variant is installed. If only igniteui-grid-lite is present, the user needs to install the premium package.

# Remove Grid Lite
npm uninstall igniteui-grid-lite

# Open-source / trial (shows watermark)
npm install igniteui-webcomponents-grids

# OR licensed package (requires private registry)
npm install @infragistics/igniteui-webcomponents-grids

Step 2 - Update Imports and Registration

Before (Grid Lite):

import { IgcGridLite, IgcGridLiteColumn } from 'igniteui-grid-lite';
import type { BaseIgcCellContext } from 'igniteui-grid-lite';
import 'igniteui-webcomponents/themes/light/bootstrap.css';

After (Premium Grid):

// Side-effect import - registers all premium grid custom elements; must come first
import 'igniteui-webcomponents-grids/grids/combined.js';

// Type imports
import type {
  IgcGridComponent,
  IgcColumnComponent,
  IgcCellTemplateContext,
  IgcColumnTemplateContext,
  IgcSortingEventArgs,
  IgcFilteringEventArgs,
  IgcRowSelectionEventArgs,
  IgcSortingExpression,
} from 'igniteui-webcomponents-grids';

// Value imports
import {
  SortingDirection,
  IgcStringFilteringOperand,
  IgcNumberFilteringOperand,
  IgcBooleanFilteringOperand,
  IgcDateFilteringOperand,
  IgcFilteringExpressionsTree,
  FilteringLogic,
  IgcNoopSortingStrategy,
  IgcNoopFilteringStrategy,
} from 'igniteui-webcomponents-grids';

// Theme — import as an inline string so it can be injected into the shadow root (requires bundler support for ?inline, e.g. Vite)
// Available: light|dark x bootstrap|material|fluent|indigo
import gridTheme from 'igniteui-webcomponents-grids/grids/themes/light/material.css?inline';

Grid inside a Shadow root — required step: A bare CSS import lands in the document head and never reaches inside a Shadow root — the grid's internal structure and elements get no styles. Inject the theme as a <style> tag inside the shadow root. For a LitElement component, at the top of render():

render() {
  return html`
    <style>${gridTheme}</style>
    <igc-grid ...></igc-grid>
  `;
}

Step 3 - Update HTML Tags

Grid Lite	Premium Grid
<igc-grid-lite>	<igc-grid>
<igc-grid-lite-column>	<igc-column>
Bare boolean attrs (sortable, filterable, hidden)	Quoted values (sortable="true", filterable="true", hidden="true")
No grid-level filter toggle	allow-filtering="true" required on <igc-grid>
No height requirement	height attribute required for row virtualization

Before:

<igc-grid-lite id="grid" auto-generate>
  <igc-grid-lite-column field="name" sortable filterable resizable></igc-grid-lite-column>
  <igc-grid-lite-column field="price" data-type="number" sortable></igc-grid-lite-column>
</igc-grid-lite>

After:

<!-- height is required for row virtualization; set it here or on a fixed-height parent -->
<igc-grid id="grid" auto-generate="true" allow-filtering="true" height="600px">
  <igc-column field="name" sortable="true" filterable="true" resizable="true"></igc-column>
  <igc-column field="price" data-type="number" sortable="true"></igc-column>
</igc-grid>

Note: allow-filtering="true" on <igc-grid> is required to enable filtering. Grid Lite had no grid-level filter toggle.

Step 4 - Update TypeScript References

// Before
const grid   = document.getElementById('grid') as IgcGridLite;
const column = document.querySelector('igc-grid-lite-column[field="name"]') as IgcGridLiteColumn;

// After
const grid   = document.getElementById('grid') as IgcGridComponent;
const column = document.querySelector('igc-column[field="name"]') as IgcColumnComponent;

// grid.data = myArray  - unchanged

Step 5 - Migrate Column Properties

Grid Lite Property	Premium Grid Property	Notes
field	field	Unchanged
header	header	Unchanged
width	width	Unchanged
hidden	hidden	Unchanged
resizable	resizable	Unchanged
sortable	sortable	Unchanged
filterable	filterable	Unchanged
dataType	dataType	Premium adds dateTime, time, currency, percent
filteringCaseSensitive	filteringIgnoreCase	Logic inverted - true becomes false
sortingCaseSensitive	sortingIgnoreCase	Logic inverted - true becomes false
sortConfiguration: { comparer }	sortStrategy: IgcSortingStrategy	Class-based (see below)
(none)	editable, pinned, groupable, hasSummary, disableHiding, disablePinning, selectable, searchable, formatter, minWidth, maxWidth	Premium-only

Custom sort strategy migration:

// Before (Grid Lite) - function comparer on column
column.sortConfiguration = { comparer: (a, b) => a.length - b.length };

// After (Premium Grid) - class extending DefaultSortingStrategy
import { DefaultSortingStrategy } from 'igniteui-webcomponents-grids';

class LengthSort extends DefaultSortingStrategy {
  override compareValues(a: string, b: string) { return a.length - b.length; }
}
column.sortStrategy = new LengthSort();

Step 6 - Migrate Cell and Header Templates

Aspect	Grid Lite	Premium Grid
Cell template property	column.cellTemplate	column.bodyTemplate
Cell context type	BaseIgcCellContext	IgcCellTemplateContext
Cell value	ctx.value	ctx.implicit
Row data	ctx.row	ctx.cell.row.data
Header template	no params	IgcColumnTemplateContext param

Cell template migration:

// Before (Grid Lite)
column.cellTemplate = (ctx) => html`<span class=${ctx.value}>${ctx.value}</span>`;

// After (Premium Grid)
column.bodyTemplate = (ctx: IgcCellTemplateContext) =>
  html`<span class=${ctx.implicit}>${ctx.implicit}</span>`;

Header template migration:

// Before (Grid Lite) - no parameters
column.headerTemplate = () => html`<strong>Name</strong>`;

// After (Premium Grid) - receives IgcColumnTemplateContext
column.headerTemplate = (ctx: IgcColumnTemplateContext) =>
  html`<strong>${ctx.column.header ?? ctx.column.field}</strong>`;

Step 7 - Migrate Remote Data Operations

Grid Lite uses dataPipelineConfiguration (async callbacks). The Premium Grid uses noop strategies + events.

Before (Grid Lite):

grid.dataPipelineConfiguration = {
  sort:   async ({ grid }) => dataService.sortRemote(grid.sortingExpressions),
  filter: async ({ grid }) => dataService.filterRemote(grid.filterExpressions),
};

After (Premium Grid):

const grid = document.getElementById('grid') as IgcGridComponent;

// Disable built-in sort/filter so the grid does not process data locally
grid.sortStrategy   = IgcNoopSortingStrategy.instance();
grid.filterStrategy = IgcNoopFilteringStrategy.instance();

// React to done events and reload data from the server
grid.addEventListener('sortingDone', async () => {
  grid.data = await dataService.sortRemote(grid.sortingExpressions);
});

grid.addEventListener('filteringDone', async () => {
  grid.data = await dataService.filterRemote(grid.filteringExpressionsTree);
});

Step 8 - Migrate Sort / Filter Events

Grid Lite Event	Premium Grid Event	Notes
sorting	sorting	Same name - both cancellable (e.detail.cancel = true)
sorted	sortingDone	Name changed - CustomEvent<IgcSortingExpression[]>
filtering	filtering	Same name - both cancellable
filtered	filteringDone	Name changed - CustomEvent<IgcFilteringExpressionsTree>

// Cancel a sort before it applies
grid.addEventListener('sorting', (e: CustomEvent<IgcSortingEventArgs>) => {
  e.detail.cancel = true;
});

// React after sort completes
grid.addEventListener('sortingDone', (e: CustomEvent<IgcSortingExpression[]>) => {
  console.log('Sorted by', e.detail);
});

// Cancel a filter before it applies
grid.addEventListener('filtering', (e: CustomEvent<IgcFilteringEventArgs>) => {
  e.detail.cancel = true;
});

// React after filter completes
grid.addEventListener('filteringDone', (e: CustomEvent<IgcFilteringExpressionsTree>) => {
  console.log('Filter tree', e.detail);
});

Step 9 - Migrate Programmatic Sort / Filter API

Grid Lite API:

grid.sort({ key: 'name', direction: 'ascending' });
grid.filter({ key: 'age', condition: 'greaterThan', searchTerm: 21 });
grid.clearSort();
grid.clearFilter();

Premium Grid API:

import { SortingDirection, IgcNumberFilteringOperand } from 'igniteui-webcomponents-grids';

// Sorting - fieldName + SortingDirection enum (Asc = 1, Desc = 2, None = 0)
grid.sort([{ fieldName: 'name', dir: SortingDirection.Asc, ignoreCase: true }]);
grid.clearSort('name');   // clear one column
grid.clearSort();           // clear all

// Filtering - positional arguments with typed operand instances
grid.filter('age', 21, IgcNumberFilteringOperand.instance().condition('greaterThan'), true);
grid.clearFilter('age');   // clear one column
grid.clearFilter();          // clear all