feat: make popover modeless by default, add modality properties

packages/popover/src/vaadin-popover-overlay.js

@@ -30,6 +30,10 @@ class PopoverOverlay extends PopoverOverlayMixin(DirMixin(ThemableMixin(PolylitM
     return [
       overlayStyles,
       css`
+        :host([modeless][with-backdrop]) [part='backdrop'] {
+          pointer-events: none;
+        }
+
         :host([position^='top'][top-aligned]) [part='overlay'],
         :host([position^='bottom'][top-aligned]) [part='overlay'] {
           margin-top: var(--vaadin-popover-offset-top, 0);

packages/popover/src/vaadin-popover.d.ts

@@ -32,9 +32,15 @@ declare class Popover extends PopoverPositionMixin(
    */
   renderer: PopoverRenderer | null | undefined;
 
+  /**
+   * When true, the popover prevents interacting with background elements
+   * by setting `pointer-events` style on the document body to `none`.
+   * This also enables trapping focus inside the overlay.
+   */
+  modal: boolean;
+
   /**
    * Set to true to disable closing popover overlay on outside click.
-   * Closing on outside click only works when the popover is modal.
    *
    * @attr {boolean} no-close-on-outside-click
    */
@@ -50,6 +56,14 @@ declare class Popover extends PopoverPositionMixin(
    */
   noCloseOnEsc: boolean;
 
+  /**
+   * When true, the overlay has a backdrop (modality curtain) on top of the
+   * underlying page content, covering the whole viewport.
+   *
+   * @attr {boolean} with-backdrop
+   */
+  withBackdrop: boolean;
+
   /**
    * Requests an update for the content of the popover.
    * While performing the update, it invokes the renderer passed in the `renderer` property.

packages/popover/src/vaadin-popover.js

@@ -49,9 +49,18 @@ class Popover extends PopoverPositionMixin(
         type: Object,
       },
 
+      /**
+       * When true, the popover prevents interacting with background elements
+       * by setting `pointer-events` style on the document body to `none`.
+       * This also enables trapping focus inside the overlay.
+       */
+      modal: {
+        type: Boolean,
+        value: false,
+      },
+
       /**
        * Set to true to disable closing popover overlay on outside click.
-       * Closing on outside click only works when the popover is modal.
        *
        * @attr {boolean} no-close-on-outside-click
        */
@@ -73,6 +82,17 @@ class Popover extends PopoverPositionMixin(
         value: false,
       },
 
+      /**
+       * When true, the overlay has a backdrop (modality curtain) on top of the
+       * underlying page content, covering the whole viewport.
+       *
+       * @attr {boolean} with-backdrop
+       */
+      withBackdrop: {
+        type: Boolean,
+        value: false,
+      },
+
       /** @private */
       _opened: {
         type: Boolean,
@@ -83,6 +103,7 @@ class Popover extends PopoverPositionMixin(
 
   constructor() {
     super();
+    this.__onGlobalClick = this.__onGlobalClick.bind(this);
     this.__onTargetClick = this.__onTargetClick.bind(this);
     this.__onTargetKeydown = this.__onTargetKeydown.bind(this);
   }
@@ -99,6 +120,9 @@ class Popover extends PopoverPositionMixin(
         .positionTarget="${this.target}"
         .position="${effectivePosition}"
         .opened="${this._opened}"
+        .modeless="${!this.modal}"
+        .focusTrap="${this.modal}"
+        .withBackdrop="${this.withBackdrop}"
         ?no-horizontal-overlap="${this.__computeNoHorizontalOverlap(effectivePosition)}"
         ?no-vertical-overlap="${this.__computeNoVerticalOverlap(effectivePosition)}"
         .horizontalAlign="${this.__computeHorizontalAlign(effectivePosition)}"
@@ -131,10 +155,19 @@ class Popover extends PopoverPositionMixin(
     this._overlayElement = this.shadowRoot.querySelector('vaadin-popover-overlay');
   }
 
+  /** @protected */
+  connectedCallback() {
+    super.connectedCallback();
+
+    document.addEventListener('click', this.__onGlobalClick, true);
+  }
+
   /** @protected */
   disconnectedCallback() {
     super.disconnectedCallback();
 
+    document.removeEventListener('click', this.__onGlobalClick, true);
+
     this._opened = false;
   }
 
@@ -158,6 +191,21 @@ class Popover extends PopoverPositionMixin(
     target.removeEventListener('keydown', this.__onTargetKeydown);
   }
 
+  /**
+   * Overlay's global outside click listener doesn't work when
+   * the overlay is modeless, so we use a separate listener.
+   * @private
+   */
+  __onGlobalClick(event) {
+    if (
+      this._opened &&
+      !event.composedPath().some((el) => el === this._overlayElement || el === this.target) &&
+      !this.noCloseOnOutsideClick
+    ) {
+      this._opened = false;
+    }
+  }
+
   /** @private */
   __onTargetClick() {
     this._opened = !this._opened;

packages/popover/test/basic.test.js

@@ -116,6 +116,38 @@ describe('popover', () => {
     });
   });
 
+  describe('overlay properties', () => {
+    it('should set modeless on the overlay by default', () => {
+      expect(overlay.modeless).to.be.true;
+    });
+
+    it('should set modeless on the overlay to false when modal is true', async () => {
+      popover.modal = true;
+      await nextUpdate(popover);
+      expect(overlay.modeless).to.be.false;
+    });
+
+    it('should not set focusTrap on the overlay by default', () => {
+      expect(overlay.modeless).to.be.true;
+    });
+
+    it('should set focusTrap on the overlay to true when modal is true', async () => {
+      popover.modal = true;
+      await nextUpdate(popover);
+      expect(overlay.focusTrap).to.be.true;
+    });
+
+    it('should propagate withBackdrop property to the overlay', async () => {
+      popover.withBackdrop = true;
+      await nextUpdate(popover);
+      expect(overlay.withBackdrop).to.be.true;
+
+      popover.withBackdrop = false;
+      await nextUpdate(popover);
+      expect(overlay.withBackdrop).to.be.false;
+    });
+  });
+
   describe('interactions', () => {
     let target;
 
@@ -149,6 +181,18 @@ describe('popover', () => {
       expect(overlay.opened).to.be.false;
     });
 
+    it('should close overlay on outside click when modal is true', async () => {
+      popover.modal = true;
+      await nextUpdate(popover);
+
+      target.click();
+      await nextRender();
+
+      outsideClick();
+      await nextRender();
+      expect(overlay.opened).to.be.false;
+    });
+
     it('should not close on outside click if noCloseOnOutsideClick is true', async () => {
       popover.noCloseOnOutsideClick = true;
       await nextUpdate(popover);
@@ -170,13 +214,30 @@ describe('popover', () => {
       expect(overlay.opened).to.be.false;
     });
 
+    it('should remove document click listener when popover is detached', async () => {
+      const spy = sinon.spy(document, 'removeEventListener');
+      popover.remove();
+      await nextRender();
+      expect(spy).to.be.called;
+      expect(spy.firstCall.args[0]).to.equal('click');
+    });
+
     describe('Escape press', () => {
       beforeEach(async () => {
         target.click();
         await nextRender();
       });
 
-      it('should close overlay on global Escape press by default', async () => {
+      it('should not close overlay on global Escape press by default', async () => {
+        esc(document.body);
+        await nextRender();
+        expect(overlay.opened).to.be.true;
+      });
+
+      it('should close overlay on global Escape press when modal is true', async () => {
+        popover.modal = true;
+        await nextUpdate(popover);
+
         esc(document.body);
         await nextRender();
         expect(overlay.opened).to.be.false;
@@ -195,6 +256,7 @@ describe('popover', () => {
       });
 
       it('should not close on global Escape press if noCloseOnEsc is true', async () => {
+        popover.modal = true;
         popover.noCloseOnEsc = true;
         await nextUpdate(popover);
 
@@ -221,5 +283,25 @@ describe('popover', () => {
         expect(overlay.opened).to.be.true;
       });
     });
+
+    describe('backdrop', () => {
+      beforeEach(async () => {
+        popover.withBackdrop = true;
+        await nextUpdate(popover);
+
+        target.click();
+        await nextRender();
+      });
+
+      it('should set pointer-events on backdrop to none when non modal', () => {
+        expect(getComputedStyle(overlay.$.backdrop).pointerEvents).to.equal('none');
+      });
+
+      it('should set pointer-events on backdrop to auto when modal', async () => {
+        popover.modal = true;
+        await nextUpdate(popover);
+        expect(getComputedStyle(overlay.$.backdrop).pointerEvents).to.equal('auto');
+      });
+    });
   });
 });

packages/popover/test/typings/popover.types.ts

@@ -23,5 +23,7 @@ assertType<HTMLElement | undefined>(popover.target);
 assertType<PopoverPosition>(popover.position);
 assertType<PopoverRenderer | null | undefined>(popover.renderer);
 assertType<string>(popover.overlayClass);
+assertType<boolean>(popover.modal);
+assertType<boolean>(popover.withBackdrop);
 assertType<boolean>(popover.noCloseOnEsc);
 assertType<boolean>(popover.noCloseOnOutsideClick);