feat: Invoker commands integration for components

.vscode/cspell.json

@@ -11,6 +11,7 @@
     "aria-valuenow",
     "aria-valuetext",
     "combobox",
+    "commandfor",
     "listbox",
     "listitem",
     "progressbar",
@@ -32,9 +33,9 @@
     "igniteui",
     "slotchange",
     "stylelint",
-    "webcomponents"
-  ],
-  "ignoreRegExpList": [
-    "θ"
+    "webcomponents",
+    "noopener",
+    "noreferrer"
   ],
+  "ignoreRegExpList": ["θ"]
 }

src/components/banner/banner.spec.ts

@@ -4,17 +4,19 @@ import {
   fixture,
   html,
   nextFrame,
+  waitUntil,
 } from '@open-wc/testing';
 import { spy } from 'sinon';
 
+import IgcButtonComponent from '../button/button.js';
 import { defineComponents } from '../common/definitions/defineComponents.js';
 import { finishAnimationsFor, simulateClick } from '../common/utils.spec.js';
 import IgcIconComponent from '../icon/icon.js';
 import IgcBannerComponent from './banner.js';
 
 describe('Banner', () => {
   before(() => {
-    defineComponents(IgcBannerComponent, IgcIconComponent);
+    defineComponents(IgcBannerComponent, IgcButtonComponent, IgcIconComponent);
   });
 
   const createDefaultBanner = () => html`
@@ -287,4 +289,163 @@ describe('Banner', () => {
       expect(banner.open).to.be.true;
     });
   });
+
+  describe('Invoker Commands API', () => {
+    afterEach(async () => {
+      if (banner.open) {
+        await banner.hide();
+      }
+    });
+
+    describe('with igc-button', () => {
+      let invoker: IgcButtonComponent;
+
+      beforeEach(async () => {
+        const container = await fixture<HTMLElement>(html`
+          <div>
+            <igc-button command="--show" commandfor="invoker-banner"
+              >Show</igc-button
+            >
+            <igc-banner id="invoker-banner"
+              >You are currently offline.</igc-banner
+            >
+          </div>
+        `);
+
+        invoker = container.querySelector<IgcButtonComponent>('igc-button')!;
+        banner = container.querySelector<IgcBannerComponent>('igc-banner')!;
+      });
+
+      it('`--show` opens the banner', async () => {
+        expect(banner.open).to.be.false;
+
+        invoker.click();
+        await waitUntil(() => banner.open);
+
+        expect(banner.open).to.be.true;
+      });
+
+      it('`--hide` closes an open banner', async () => {
+        await banner.show();
+        expect(banner.open).to.be.true;
+
+        invoker.command = '--hide';
+        await elementUpdated(invoker);
+
+        invoker.click();
+        await waitUntil(() => !banner.open);
+
+        expect(banner.open).to.be.false;
+      });
+
+      it('`--toggle` opens a closed banner', async () => {
+        expect(banner.open).to.be.false;
+
+        invoker.command = '--toggle';
+        await elementUpdated(invoker);
+
+        invoker.click();
+        await waitUntil(() => banner.open);
+
+        expect(banner.open).to.be.true;
+      });
+
+      it('`--toggle` closes an open banner', async () => {
+        await banner.show();
+        expect(banner.open).to.be.true;
+
+        invoker.command = '--toggle';
+        await elementUpdated(invoker);
+
+        invoker.click();
+        await waitUntil(() => !banner.open);
+
+        expect(banner.open).to.be.false;
+      });
+
+      it('a disabled igc-button does not invoke commands', async () => {
+        invoker.disabled = true;
+        await elementUpdated(invoker);
+
+        invoker.click();
+        await elementUpdated(banner);
+
+        expect(banner.open).to.be.false;
+      });
+    });
+
+    describe('with native button', () => {
+      let invoker: HTMLButtonElement;
+
+      beforeEach(async () => {
+        const container = await fixture<HTMLElement>(html`
+          <div>
+            <button>Show</button>
+            <igc-banner id="native-invoker-banner"
+              >You are currently offline.</igc-banner
+            >
+          </div>
+        `);
+
+        invoker = container.querySelector<HTMLButtonElement>('button')!;
+        banner = container.querySelector<IgcBannerComponent>('igc-banner')!;
+
+        invoker.setAttribute('command', '--show');
+        invoker.setAttribute('commandfor', 'native-invoker-banner');
+      });
+
+      it('`--show` opens the banner', async () => {
+        expect(banner.open).to.be.false;
+
+        invoker.click();
+        await waitUntil(() => banner.open);
+
+        expect(banner.open).to.be.true;
+      });
+
+      it('`--hide` closes an open banner', async () => {
+        await banner.show();
+        expect(banner.open).to.be.true;
+
+        invoker.setAttribute('command', '--hide');
+
+        invoker.click();
+        await waitUntil(() => !banner.open);
+
+        expect(banner.open).to.be.false;
+      });
+
+      it('`--toggle` opens a closed banner', async () => {
+        expect(banner.open).to.be.false;
+
+        invoker.setAttribute('command', '--toggle');
+
+        invoker.click();
+        await waitUntil(() => banner.open);
+
+        expect(banner.open).to.be.true;
+      });
+
+      it('`--toggle` closes an open banner', async () => {
+        await banner.show();
+        expect(banner.open).to.be.true;
+
+        invoker.setAttribute('command', '--toggle');
+
+        invoker.click();
+        await waitUntil(() => !banner.open);
+
+        expect(banner.open).to.be.false;
+      });
+
+      it('a disabled native button does not invoke commands', async () => {
+        invoker.disabled = true;
+
+        invoker.click();
+        await elementUpdated(banner);
+
+        expect(banner.open).to.be.false;
+      });
+    });
+  });
 });

src/components/banner/banner.ts

@@ -5,6 +5,7 @@ import { addAnimationController } from '../../animations/player.js';
 import { growVerIn, growVerOut } from '../../animations/presets/grow/index.js';
 import { addThemingController } from '../../theming/theming-controller.js';
 import IgcButtonComponent from '../button/button.js';
+import { addCommandController } from '../common/controllers/command.js';
 import { addInternalsController } from '../common/controllers/internals.js';
 import { addSlotController, setSlots } from '../common/controllers/slot.js';
 import { registerComponent } from '../common/definitions/register.js';
@@ -19,25 +20,60 @@ export interface IgcBannerComponentEventMap {
 }
 
 /**
- * The `igc-banner` component displays important and concise message(s) for a user to address, that is specific to a page or feature.
+ * A non-modal notification banner that displays important, concise messages
+ * requiring user acknowledgement.
+ *
+ * The banner slides into view with an animated grow transition and renders
+ * inline, pushing the surrounding page content rather than overlaying it.
+ * It provides a default "OK" dismiss action that fires `igcClosing` /
+ * `igcClosed`, and supports custom action content through the `actions` slot.
+ *
+ * The component integrates with the
+ * [Invoker Commands API](https://developer.mozilla.org/en-US/docs/Web/API/Invoker_Commands_API):
+ * an `igc-button` or a native `<button>` with `command="--show"` / `"--hide"` /
+ * `"--toggle"` and `commandfor` pointing to this element will call the
+ * corresponding method declaratively without any JavaScript.
  *
  * @element igc-banner
  *
- * @slot - Renders the text content of the banner message.
- * @slot prefix - Renders additional content at the start of the message block.
- * @slot actions - Renders any action elements.
+ * @fires igcClosing - Emitted just before the banner closes in response to the
+ *   default action button being clicked. Cancelable — call
+ *   `event.preventDefault()` to abort the closing sequence.
+ * @fires igcClosed - Emitted after the banner has fully closed and its exit
+ *   animation has completed.
+ *
+ * @slot - The banner message text content.
+ * @slot prefix - An icon or illustration rendered to the left of the message.
+ *   Useful for reinforcing the message type (info, warning, success, etc.).
+ * @slot actions - Custom action elements rendered in the banner's action area.
+ *   When provided, replaces the default "OK" dismiss button.
  *
- * @fires igcClosing - Emitted before closing the banner - when a user interacts (click) with the default action of the banner.
- * @fires igcClosed - Emitted after the banner is closed - when a user interacts (click) with the default action of the banner.
+ * @csspart base - The root wrapper element of the banner.
+ * @csspart spacer - The inner wrapper that controls the spacing around the banner content.
+ * @csspart message - The container that holds the illustration and text content.
+ * @csspart illustration - The container for the prefix slot (icon/illustration).
+ * @csspart content - The container for the default message slot.
+ * @csspart actions - The container for the action buttons slot.
  *
- * @csspart base - The base wrapper of the banner component.
- * @csspart spacer - The inner wrapper that sets the space around the banner.
- * @csspart message - The part that holds the text and the illustration.
- * @csspart illustration - The part that holds the banner icon/illustration.
- * @csspart content - The part that holds the banner text content.
- * @csspart actions - The part that holds the banner action buttons.
+ * @example
+ * <!-- Basic banner with a custom action -->
+ * <igc-banner id="banner">
+ *   You are currently offline. Check your connection.
+ *   <div slot="actions">
+ *     <igc-button onclick="banner.hide()">Dismiss</igc-button>
+ *     <igc-button onclick="banner.hide()">Retry</igc-button>
+ *   </div>
+ * </igc-banner>
+ * <igc-button onclick="banner.show()">Show Banner</igc-button>
+ *
+ * @example
+ * <!-- Declarative control via the Invoker Commands API -->
+ * <igc-button command="--toggle" commandfor="status-banner">Toggle</igc-button>
+ * <igc-banner id="status-banner">
+ *   <igc-icon slot="prefix" name="warning"></igc-icon>
+ *   Your session is about to expire.
+ * </igc-banner>
  */
-
 export default class IgcBannerComponent extends EventEmitterMixin<
   IgcBannerComponentEventMap,
   Constructor<LitElement>
@@ -54,8 +90,15 @@ export default class IgcBannerComponent extends EventEmitterMixin<
   private readonly _player = addAnimationController(this, this._bannerRef);
 
   /**
-   * Determines whether the banner is being shown/hidden.
-   * @attr
+   * Whether the banner is open.
+   *
+   * Setting this property programmatically will immediately show or hide the
+   * banner without animation and without emitting `igcClosing` / `igcClosed`.
+   * Prefer the `show()`, `hide()`, and `toggle()` methods for animated
+   * transitions. Events are only emitted when the banner is closed through
+   * user interaction with the default action button.
+   * @attr open
+   * @default false
    */
   @property({ type: Boolean, reflect: true })
   public open = false;
@@ -71,6 +114,10 @@ export default class IgcBannerComponent extends EventEmitterMixin<
         ariaLive: 'polite',
       },
     });
+    addCommandController(this)
+      .set('--show', this.show)
+      .set('--hide', this.hide)
+      .set('--toggle', this.toggle);
   }
 
   private async _handleClick(): Promise<void> {
@@ -80,7 +127,12 @@ export default class IgcBannerComponent extends EventEmitterMixin<
     }
   }
 
-  /** Shows the banner if not already shown. Returns `true` when the animation has completed. */
+  /**
+   * Opens the banner with an animated grow-in transition.
+   *
+   * Returns `true` when the banner was successfully opened, or `false` if
+   * it was already open.
+   */
   public async show(): Promise<boolean> {
     if (this.open) {
       return false;
@@ -90,7 +142,12 @@ export default class IgcBannerComponent extends EventEmitterMixin<
     return this._player.playExclusive(growVerIn());
   }
 
-  /** Hides the banner if not already hidden. Returns `true` when the animation has completed. */
+  /**
+   * Closes the banner with an animated grow-out transition.
+   *
+   * Returns `true` when the banner was successfully closed, or `false` if
+   * it was already closed.
+   */
   public async hide(): Promise<boolean> {
     if (!this.open) {
       return false;
@@ -101,7 +158,12 @@ export default class IgcBannerComponent extends EventEmitterMixin<
     return true;
   }
 
-  /** Toggles between shown/hidden state. Returns `true` when the animation has completed. */
+  /**
+   * Toggles the banner open or closed depending on its current state.
+   *
+   * Equivalent to calling `show()` when closed and `hide()` when open.
+   * Returns `true` when the transition completed successfully.
+   */
   public async toggle(): Promise<boolean> {
     return this.open ? this.hide() : this.show();
   }