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feat(ui5-combobox): add public horizontalAlign property for dropdown horizontal alignment #13898

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feat(ui5-combobox): add public horizontalAlign property for dropdown horizontal alignment #13898

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2e0bef3
feat(ui5-combobox, ui5-select): add public property for dropdown hori…
Vonahz Aug 6, 2026
c312b85
Merge branch 'main' of https://github.com/SAP/ui5-webcomponents into …
Vonahz Aug 6, 2026
f19383e
feat(ui5-combobox): add public horizontalAlign property for dropdown …
Vonahz Aug 6, 2026
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10 changes: 10 additions & 0 deletions packages/main/src/ComboBox.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,7 @@ import "./ComboBoxItemGroup.js";
// eslint-disable-next-line
import { isInstanceOfComboBoxItemGroup } from "./ComboBoxItemGroup.js";
import type ComboBoxFilter from "./types/ComboBoxFilter.js";
import type PopoverHorizontalAlign from "./types/PopoverHorizontalAlign.js";
import type Input from "./Input.js";
import type { InputEventDetail } from "./Input.js";
import type { ListItemBaseClickEventDetail } from "./ListItemBase.js";
Expand Down Expand Up @@ -401,6 +402,15 @@ class ComboBox extends UI5Element implements IFormInputElement {
@property({ type: Boolean })
showClearIcon = false;

/**
* Determines the horizontal alignment of the component's dropdown menu relative to the component.
* @default "Start"
* @public
* @since 2.26.0
*/
@property()
horizontalAlign: `${PopoverHorizontalAlign}` = "Start";

/**
* Indicates whether the input is focused
* @private
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2 changes: 1 addition & 1 deletion packages/main/src/ComboBoxPopoverTemplate.tsx
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Expand Up @@ -25,7 +25,7 @@ export default function ComboBoxPopoverTemplate(this: ComboBox) {
preventFocusRestore={true}
preventInitialFocus={true}
placement="Bottom"
horizontalAlign="Start"
horizontalAlign={this.horizontalAlign}
accessibleName={this._popupLabel}
onBeforeOpen={this._beforeOpenPopover}
onOpen={this._afterOpenPopover}
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66 changes: 66 additions & 0 deletions packages/main/test/pages/ComboBox.html
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Expand Up @@ -921,6 +921,72 @@ <h3>Newline Normalization Test</h3>
</script>
</div>

<div class="demo-section" style="padding: 30px; background: #f5f5f5; border: 3px solid #0854a0; border-radius: 8px; margin: 20px 0;">
<h3 style="color: #0854a0; margin-top: 0;">Horizontal Align Property</h3>
<p>Control the horizontal alignment of the dropdown menu relative to the ComboBox.</p>
<br />

<div style="display: flex; justify-content: space-between; gap: 20px; margin-bottom: 40px;">
<div style="flex: 1;">
<ui5-label>Start (default) - Left side:</ui5-label>
<br />
<ui5-combobox id="align-start" horizontal-align="Start" style="width: 200px;">
<ui5-cb-item text="Algeria"></ui5-cb-item>
<ui5-cb-item text="Argentina"></ui5-cb-item>
<ui5-cb-item text="Australia"></ui5-cb-item>
<ui5-cb-item text="Very long text that makes popover wider than the ComboBox"></ui5-cb-item>
<ui5-cb-item text="Austria"></ui5-cb-item>
<ui5-cb-item text="Bahrain"></ui5-cb-item>
<ui5-cb-item text="Belgium"></ui5-cb-item>
</ui5-combobox>
</div>

<div style="flex: 1; display: flex; flex-direction: column; align-items: center;">
<ui5-label>Center - Middle:</ui5-label>
<br />
<ui5-combobox id="align-center" horizontal-align="Center" style="width: 200px;">
<ui5-cb-item text="Algeria"></ui5-cb-item>
<ui5-cb-item text="Argentina"></ui5-cb-item>
<ui5-cb-item text="Australia"></ui5-cb-item>
<ui5-cb-item text="Very long text that makes popover wider than the ComboBox"></ui5-cb-item>
<ui5-cb-item text="Austria"></ui5-cb-item>
<ui5-cb-item text="Bahrain"></ui5-cb-item>
<ui5-cb-item text="Belgium"></ui5-cb-item>
</ui5-combobox>
</div>

<div style="flex: 1; display: flex; flex-direction: column; align-items: flex-end;">
<ui5-label>End - Right side:</ui5-label>
<br />
<ui5-combobox id="align-end" horizontal-align="End" style="width: 200px;">
<ui5-cb-item text="Algeria"></ui5-cb-item>
<ui5-cb-item text="Argentina"></ui5-cb-item>
<ui5-cb-item text="Australia"></ui5-cb-item>
<ui5-cb-item text="Very long text that makes popover wider than the ComboBox"></ui5-cb-item>
<ui5-cb-item text="Austria"></ui5-cb-item>
<ui5-cb-item text="Bahrain"></ui5-cb-item>
<ui5-cb-item text="Belgium"></ui5-cb-item>
</ui5-combobox>
</div>
</div>

<div style="display: flex; justify-content: center;">
<div>
<ui5-label>Stretch - Matches ComboBox width:</ui5-label>
<br />
<ui5-combobox id="align-stretch" horizontal-align="Stretch" style="width: 200px;">
<ui5-cb-item text="Algeria"></ui5-cb-item>
<ui5-cb-item text="Argentina"></ui5-cb-item>
<ui5-cb-item text="Australia"></ui5-cb-item>
<ui5-cb-item text="Very long text that makes popover wider than the ComboBox"></ui5-cb-item>
<ui5-cb-item text="Austria"></ui5-cb-item>
<ui5-cb-item text="Bahrain"></ui5-cb-item>
<ui5-cb-item text="Belgium"></ui5-cb-item>
</ui5-combobox>
</div>
</div>
</div>

</body>

</html>
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