Move all elements specific members from the angular grids into angular-element's source.

[MayaKirova]

Closes #15235

Additional information (check all that apply):

• Bug fix
• New functionality
• Documentation
• Demos
• CI/CD

Checklist:

• All relevant tags have been applied to this PR
• This PR includes unit tests covering all the new code (test guidelines)
• This PR includes API docs for newly added methods/properties (api docs guidelines)
• This PR includes feature/README.MD updates for the feature docs
• This PR includes general feature table updates in the root README.MD
• This PR includes CHANGELOG.MD updates for newly added functionality
• This PR contains breaking changes
• This PR includes ng update migrations for the breaking changes (migrations guidelines)
• This PR includes behavioral changes and the feature specification has been updated with them

[dkamburov]

@MayaKirova there is a conflict here

[dkamburov]

@MayaKirova please resolve the conflicts here

[github-actions]

There has been no recent activity and this PR has been marked inactive.

[dkamburov]

@MayaKirova there is a conflict here

[Copilot]

Pull request overview

This PR moves Elements-/codegen-specific Grid members (Blazor/WC metadata and internal-only events/collections) out of igniteui-angular grid sources and into igniteui-angular-elements, by introducing Elements wrapper components and updating the Elements analyzer/registration to target them.

Changes:

• Removes Elements-only outputs/metadata from Angular grid base sources (e.g., columnsAutogenerated, childrenResolved, action strip collection tags) and adjusts internals (ContentChildren → ContentChild for action strip).
• Introduces Elements wrapper components for Grid, TreeGrid, HierarchicalGrid, and RowIsland that re-add Elements-only outputs/collections and re-emit columnsAutogenerated.
• Updates Elements registration/analyzer configuration to use the new wrapper components, plus minor build config updates (angular.json bundle budget; package-lock.json metadata).

Reviewed changes

Copilot reviewed 22 out of 23 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
projects/igniteui-angular/paginator/src/paginator/paginator.component.ts	Updates @igxParent metadata to reference Elements grid wrappers.
projects/igniteui-angular/grids/tree-grid/src/tree-grid.component.ts	Removes Blazor dependency tags; adds blazorAlternateName/indirect-render metadata.
projects/igniteui-angular/grids/hierarchical-grid/src/row-island.component.ts	Removes Elements-only template/content/query/event members from Angular RowIsland.
projects/igniteui-angular/grids/hierarchical-grid/src/hierarchical-grid.component.ts	Removes Elements-only action strip query override; updates Blazor metadata.
projects/igniteui-angular/grids/grid/src/grid.component.ts	Removes Blazor dependency tags; adds blazorAlternateName/indirect-render metadata.
projects/igniteui-angular/grids/grid/src/grid-base.directive.ts	Removes Elements-only outputs (columnsAutogenerated, childrenResolved), changes action strip query to ContentChild, removes columnsAutogenerated emit.
projects/igniteui-angular/grids/core/src/toolbar/grid-toolbar.component.ts	Updates @igxParent metadata to reference Elements grid wrappers.
projects/igniteui-angular/grids/core/src/common/events.ts	Removes IColumnsAutoGeneratedEventArgs from Angular grids core (moved to Elements).
projects/igniteui-angular/grids/core/src/columns/column.component.ts	Updates @igxParent metadata to reference Elements grid wrappers.
projects/igniteui-angular/grids/core/src/columns/column-layout.component.ts	Updates @igxParent metadata to reference Elements grid wrappers.
projects/igniteui-angular/grids/core/src/columns/column-group.component.ts	Updates @igxParent metadata to reference Elements grid wrappers.
projects/igniteui-angular/action-strip/src/action-strip/action-strip.component.ts	Updates @igxParent metadata to reference Elements grid wrappers.
projects/igniteui-angular-elements/src/lib/state.component.ts	Updates @igxParent metadata to reference Elements grid wrappers.
projects/igniteui-angular-elements/src/lib/grids/tree-grid.component.ts	Adds Elements TreeGrid wrapper component, reintroducing Elements-only outputs/collections.
projects/igniteui-angular-elements/src/lib/grids/row-island.component.ts	Adds Elements RowIsland wrapper component, reintroducing Elements-only members and childDataKey.
projects/igniteui-angular-elements/src/lib/grids/hierarchical-grid.component.ts	Adds Elements HierarchicalGrid wrapper component, reintroducing Elements-only outputs/collections.
projects/igniteui-angular-elements/src/lib/grids/grid.component.ts	Adds Elements Grid wrapper component, reintroducing Elements-only outputs/collections.
projects/igniteui-angular-elements/src/lib/grids/events.ts	Adds Elements-only IColumnsAutoGeneratedEventArgs definition.
projects/igniteui-angular-elements/src/app/components.ts	Registers custom elements using Elements wrapper components instead of Angular grid components.
projects/igniteui-angular-elements/src/analyzer/elements.config.ts	Updates analyzer registration to prefer Elements wrapper components and adjusts content queries.
projects/igniteui-angular-elements/src/analyzer/config.template.ts	Updates analyzer template to use Elements wrapper components.
package-lock.json	Updates lockfile metadata (dev/optional/peer flags).
angular.json	Increases bundle budget maximum error threshold.

[damyanpetev]

Oh, well that's awkward to say the least. This goes directly into the public API docs for Ignite UI for Angular, so not really great to list the elements class names.

Two options:

1. Make the parent resolve more flexible so old IgxGridComponent also recognizes the extended IgxGridElementsComponent
2. OR, bit a odd idea, but might work: Re-define IgxGridComponent as the extended class in Elements and simply alias the main component as something else:

   import { IgxGridComponent as IgxGrid } from 'igniteui-angular/grids/grid/src/grid.component';
   @Component({
       selector: 'igx-grid',
       templateUrl: '../../../../igniteui-angular/grids/grid/src/grid.component.html'
   })
   export class IgxGridComponent extends IgxGrid {

Honestly, the second option would mean we touch almost nothing in the main source and the config for elements too, merely change the import path for IgxGridComponent to come from elements instead.

[MayaKirova]

Why would this go in the public api docs for Angular? It's under the projects/igniteui-angular-elements and the components should only ship with wc.

[damyanpetev]

Okay, left the comment on the wrong file for this, but applies to action strip and grid columns, those tags end up here:
https://www.infragistics.com/products/ignite-ui-angular/docs/typescript/latest/classes/igxactionstripcomponent.html
https://www.infragistics.com/products/ignite-ui-angular/docs/typescript/latest/classes/igxcolumncomponent.html

and so on.

[MayaKirova]

Seems to work with the aliases. Added the change.

[damyanpetev]

One last concern I have is with the HGrid - I know we had functionality so toolbars and such as templates can discover their actual igx-hierarchical-grid parent that's not an Element. The selector is the same but the instance prototype won't be.
Not sure if the original Angular class missing from the elements config will cause issues with that functionality (must check carefully there)

[MayaKirova]

Seems to work for toolbar, at least in the dev sample:

Also for paginator: