UI.TableCell
luastra/uiUI.TableCell(input: Input): Node
Creates a data cell or a scoped row or column header within a TableRow. Header scope lets assistive technology announce the correct relationship while users move through the table.
Mental model
This is a declarative node: app.render describes it again from current state, while the host matches its stable id to the existing view.
Before you use it
Add luastra/ui to this module's dependencies in luastra.json, then import it with require("luastra/ui"). The project must declare the ui.render capability. app.render must return one UI.Screen root; place this node inside that tree rather than invoking it for a hidden side effect.
How it fits
The constructor validates its fields immediately and returns a UI.Node. After app.render returns, the host reconciles that node by stable id with the current semantic DOM-based interface. Current desktop and mobile hosts package the same web artifact; native adapters are used at capability boundaries.
When to use it
Use UI.TableCell only inside UI.TableRow. Mark cells as headers when they label a row or column; use ordinary cells for values.
Shared parameter groups
Parameters
| Parameter | Type / values | Description |
|---|---|---|
| id | lowercase path, required | Unique ID. |
| text | string? | Short cell text when nested content is unnecessary. |
| header | boolean? | Marks this cell as a row or column header. |
| scope | col | row? | Associates a header cell with its column or row. |
| children | UI.Node[] | Optional nested nodes instead of short text. |
| gap | none | xs | sm | md | lg | xl | Space between children. Group: Layout and surfaces. |
| padding | none | xs | sm | md | lg | xl | responsive | All-side inner spacing; responsive is supported only by padding. Group: Layout and surfaces. |
| margin | none | xs | sm | md | lg | xl | All-side outer spacing. Group: Layout and surfaces. |
| paddingX / paddingY | none | xs | sm | md | lg | xl | Axis-specific inner spacing. Group: Layout and surfaces. |
| paddingTop / paddingBottom / paddingStart / paddingEnd | none | xs | sm | md | lg | xl | Logical side-specific inner spacing. Group: Layout and surfaces. |
| marginX / marginY | none | xs | sm | md | lg | xl | Axis-specific outer spacing. Group: Layout and surfaces. |
| marginTop / marginBottom / marginStart / marginEnd | none | xs | sm | md | lg | xl | Logical side-specific outer spacing. Group: Layout and surfaces. |
| surface | plain | card | elevated | accent | Background, border, and elevation. Group: Layout and surfaces. |
| width | full | content | wide | Available width, 720 px maximum, or 1180 px maximum. Group: Layout and surfaces. |
| align | start | center | end | stretch | between | Cross-axis alignment. Group: Layout and surfaces. |
| justify | start | center | end | between | Main-axis alignment. Group: Layout and surfaces. |
| flow | wrap | nowrap | Flex wrapping. Group: Layout and surfaces. |
| responsive | boolean | Narrow-screen adaptation. Group: Layout and surfaces. |
| className | safe string ≤ 256 bytes | Additional admitted class tokens. Group: Layout and surfaces. |
| role | alert | group | status | Supported ARIA role. Group: State and semantics. |
| hidden | boolean | Visibility state. Group: State and semantics. |
| textColor | token | #RRGGBB | Local or inherited foreground. Group: Text and local colors. |
| backgroundColor | token | #RRGGBB | Component-box background. Group: Text and local colors. |
| Color tokens | accent | danger | muted | surface | success | text | transparent | warning | Current Screen theme colors. Group: Text and local colors. |
Children and layout
Optional nested nodes instead of short text.
Accessibility and keyboard
For a header, set header=true and the appropriate scope=col or scope=row.
Common mistakes
- Using a duplicate id or an uppercase path segment.
- Passing a shared-group parameter that is not listed on this component page.
Returns
Node — a validated declarative UI node that becomes part of the next host-neutral render tree.
What happens next
A validated declarative node appears after it is returned as part of the current render tree.
Failures and fixes
Invalid fields, duplicate IDs, unsupported child combinations, or a missing ui.render capability fail during check, render-tree validation, or host startup.
Availability
Source API in 0.5.0-alpha; the public installer targets 0.5.0-alpha. Verify host-specific behavior against the selected SDK.
Focused example
UI.TableCell { id = "docs/cell", text = "full | content | wide" }