# Reusable Element

A reusable element instance, in the normal flow or floating.

URL: https://webrad.atentor.com/docs/reusable-element
Updated: 2026-11-07

WebReusableElement · Containers · Visual · 0 events

## Quick start

Add **Reusable1** in the Designer. Use the example in a page method.

```ts
Reusable1.placement = 'floating';
Reusable1.floatingHorizontalAnchor = 'right';
Reusable1.floatingVerticalAnchor = 'bottom';
Reusable1.floatingZIndex = 100;
Reusable1.show();
```

Each placement has its own state. Edit internal components in the reusable definition’s code.

- Create the definition in Reusable elements and select it in the instance’s Inspector.
- Link events and write logic in the definition’s TypeScript file.
- Use placement to choose normal flow or a floating layer; configure anchors and floatingZIndex as needed.
- Children belong to the definition’s scope and do not automatically become public host properties.

## Inspector properties

Component options and defaults. Fields without runtime access are configured in the Inspector.

| Property / source | Type and options | Default | Runtime access |
| --- | --- | --- | --- |
| `name` — Name · Identity | `string` | `—` | name |
| `x` — Left · Size & position | `number` | `0` | x |
| `y` — Top · Size & position | `number` | `0` | y |
| `width` — Width · Size & position | `number` | `360` | width |
| `height` — Height · Size & position | `number` | `240` | height |
| `itemWidth` — Responsive width · Responsive size — Fit content grows the item to its widest rendered child and preserves child intrinsic widths; minimum and maximum width remain limits. | `enum` — `fixed` `stretch` `fit-content` | `"fixed"` | Inspector / configuration |
| `itemHeight` — Responsive height · Responsive size — Fit content grows the item to its lowest rendered child and preserves child intrinsic heights; minimum and maximum height remain limits. | `enum` — `fixed` `stretch` `fit-content` | `"fixed"` | Inspector / configuration |
| `itemMinWidth` — Minimum width · Responsive size | `number` | `0` | Inspector / configuration |
| `itemMaxWidth` — Maximum width · Responsive size | `number` | `null` | Inspector / configuration |
| `itemMinHeight` — Minimum height · Responsive size | `number` | `0` | Inspector / configuration |
| `itemMaxHeight` — Maximum height · Responsive size | `number` | `null` | Inspector / configuration |
| `itemGrow` — Grow · Responsive size | `number` | `0` | Inspector / configuration |
| `itemShrink` — Shrink · Responsive size — Allows fixed and stretch flow items to yield space. Fit-content keeps its intrinsic size so its children are not compressed. | `boolean` | `true` | Inspector / configuration |
| `itemAlignSelf` — Item alignment · Responsive size — Cross-axis alignment for this item in a row or column. Auto inherits the parent alignment; responsive cross-axis stretch retains its sizing behavior. | `enum` — `auto` `start` `center` `end` `stretch` | `"auto"` | Inspector / configuration |
| `itemHorizontalAnchor` — Horizontal anchor · Anchors & offsets | `enum` — `start` `center` `end` `stretch` | `"start"` | Inspector / configuration |
| `itemVerticalAnchor` — Vertical anchor · Anchors & offsets | `enum` — `start` `center` `end` `stretch` | `"start"` | Inspector / configuration |
| `itemLeft` — Left inset · Anchors & offsets | `number` | `0` | Inspector / configuration |
| `itemRight` — Right inset · Anchors & offsets | `number` | `0` | Inspector / configuration |
| `itemTop` — Top inset · Anchors & offsets | `number` | `0` | Inspector / configuration |
| `itemBottom` — Bottom inset · Anchors & offsets | `number` | `0` | Inspector / configuration |
| `margin` — Margin · Spacing — Outer spacing on all four sides, in pixels. Row and column layouts include this spacing between components. | `number` | `0` | margin |
| `marginTop` — Margin top · Spacing — Outer spacing on this side, in pixels. Overrides the shared Margin value. | `number` | `0` — Derived from saved properties | marginTop |
| `marginRight` — Margin right · Spacing — Outer spacing on this side, in pixels. Overrides the shared Margin value. | `number` | `0` — Derived from saved properties | marginRight |
| `marginBottom` — Margin bottom · Spacing — Outer spacing on this side, in pixels. Overrides the shared Margin value. | `number` | `0` — Derived from saved properties | marginBottom |
| `marginLeft` — Margin left · Spacing — Outer spacing on this side, in pixels. Overrides the shared Margin value. | `number` | `0` — Derived from saved properties | marginLeft |
| `visible` — Visible · Behavior | `boolean` | `true` | visible |
| `collapseWhenHidden` — Collapse when hidden · Behavior — Removes the component from the layout while it is not visible. | `boolean` | `true` | collapseWhenHidden |
| `enabled` — Enabled · Behavior | `boolean` | `true` | enabled |
| `reusableElementId` — Reusable component · Reusable component — The shared component definition rendered by this instance. | `reusable-element` | `""` | reusableElementId |
| `placement` — Placement · Reusable component — Floating instances are fixed to the viewport and do not consume page flow. | `enum` — `in-flow` `floating` | `"in-flow"` | placement |
| `floatingHorizontalAnchor` — Floating horizontal anchor · Floating placement | `enum` — `left` `center` `right` | `"left"` | floatingHorizontalAnchor — Conditional availability in the Inspector |
| `floatingVerticalAnchor` — Floating vertical anchor · Floating placement | `enum` — `top` `center` `bottom` | `"top"` | floatingVerticalAnchor — Conditional availability in the Inspector |
| `floatingZIndex` — Floating layer · Floating placement | `number` | `100` | floatingZIndex |
| `currentRowBindings` — Current row · Data — Bind writable visual values to fields of this repeated row. | `current-row-bindings` — Editor: current-row-bindings | `[]` | currentRowBindings |

## API in code

| Member | Signature | Access |
| --- | --- | --- |
| `reusableElementId` | `reusableElementId: string;` | Read and write |

Inherited members (41)

| Member | Signature | Access |
| --- | --- | --- |
| `aspectRatio` | `aspectRatio: WebAspectRatio;` | Read and write |
| `floatingAlignment` | `floatingAlignment: WebPanelFloatingAlignment;` | Read and write |
| `placement` | `placement: 'in-flow' \| 'floating';` | Read and write |
| `floatingHorizontalAnchor` | `floatingHorizontalAnchor: 'left' \| 'center' \| 'right';` | Read and write |
| `floatingVerticalAnchor` | `floatingVerticalAnchor: 'top' \| 'center' \| 'bottom';` | Read and write |
| `floatingZIndex` | `floatingZIndex: number;` | Read and write |
| `caption` | `caption: string;` | Read and write |
| `progressEnabled` | `progressEnabled: boolean;` | Read and write |
| `progressValue` | `progressValue: number;` | Read and write |
| `progressVisible` | `readonly progressVisible: boolean;` | Read-only |
| `backgroundImage` | `backgroundImage: string;` | Read and write |
| `backgroundSize` | `backgroundSize: WebPanelBackgroundSize;` | Read and write |
| `backgroundPosition` | `backgroundPosition: WebPanelBackgroundPosition;` | Read and write |
| `backgroundRepeat` | `backgroundRepeat: WebPanelBackgroundRepeat;` | Read and write |
| `currentRowBindings` | `currentRowBindings: readonly WebCurrentRowBinding[];` | Read and write |
| `element` | `readonly element: TElement;` | Read-only |
| `id` | `readonly id: string;` | Read-only |
| `name` | `readonly name: string;` | Read-only |
| `visible` | `visible: boolean;` | Read and write |
| `collapseWhenHidden` | `collapseWhenHidden: boolean;` | Read and write |
| `enabled` | `enabled: boolean;` | Read and write |
| `x` | `x: number;` | Read and write |
| `y` | `y: number;` | Read and write |
| `width` | `width: number;` | Read and write |
| `height` | `height: number;` | Read and write |
| `margin` — Outer spacing on all four sides, in pixels. | `margin: number;` | Read and write |
| `marginTop` | `marginTop: number;` | Read and write |
| `marginRight` | `marginRight: number;` | Read and write |
| `marginBottom` | `marginBottom: number;` | Read and write |
| `marginLeft` | `marginLeft: number;` | Read and write |
| `alignSelf` | `alignSelf: RuntimeLayoutAlignSelf;` | Read and write |
| `tabIndex` | `tabIndex: number;` | Read and write |
| `backgroundColor` | `backgroundColor: string;` | Read and write |
| `color` | `color: string;` | Read and write |
| `borderColor` | `borderColor: string;` | Read and write |

### `focus`

method

```ts
focus(options?: FocusOptions): void;
```

### `show`

method

```ts
show(): void;
```

### `hide`

method

```ts
hide(): void;
```

### `bindEvent`

method

```ts
bindEvent(eventName: string, handler: WebComponentEventHandler<this> | null): () => void;
```

### `emit`

method

```ts
emit(eventName: string, detail?: unknown): boolean;
```

### `dispose`

method

```ts
dispose(): void;
```

## Events

Link methods in **Interaction**. [How to use events](https://webrad.atentor.com/docs/interactions).

This component’s host does not register events in Interaction. Edit internal component events in the reusable definition’s code.