# BlockStack
This structures layout elements along the vertical axis of the page. It's useful for vertical alignment.
### Laying out elements in a column

```tsx
import React from 'react';
import {
  render,
  BlockStack,
} from '@shopify/ui-extensions-react/admin';

render('Playground', () => <App />);

function App() {
  return (
    <BlockStack gap>
      <>Child 1</>
      <>Child 2</>
      <>Child 3</>
      <>Child 4</>
    </BlockStack>
  );
}

```

```js
import {
  extension,
  BlockStack,
} from '@shopify/ui-extensions/admin';

export default extension(
  'Playground',
  (root) => {
    const blockStack = root.createComponent(
      BlockStack,
      {
        gap: true,
      },
      [
        root.createText('Child 1'),
        root.createText('Child 2'),
        root.createText('Child 3'),
        root.createText('Child 4'),
      ],
    );

    root.appendChild(blockStack);
  },
);

```


## BlockStackProps

### BlockStackProps

### accessibilityLabel
A label that describes the purpose or contents of the element. When set, it will be announced to users using assistive technologies and will provide them with more context. When set, any children or `label` supplied will not be announced to screen readers.
### accessibilityRole
Sets the semantic meaning of the component’s content. When set, the role will be used by assistive technologies to help users navigate the page.
### blockAlignment
Position children along the cross axis
### blockGap
Adjust spacing between elements in the block axis.

Alias for `rowGap`
### blockSize
Adjust the block size.

- `number`: size in pixels.
- `` `${number}%` ``: size in percentages of the available space.
### gap
Adjust spacing between children
### id
A unique identifier for the element.
### inlineAlignment

/**   Position children along the main axis
### inlineSize
Adjust the inline size.

- `number`: size in pixels.
- `` `${number}%` ``: size in percentages of the available space.
### maxBlockSize
Adjust the maximum block size.

- `number`: size in pixels.
- `` `${number}%` ``: size in percentages of the available space.
### maxInlineSize
Adjust the maximum inline size.

- `number`: size in pixels.
- `` `${number}%` ``: size in percentages of the available space.
### minBlockSize
Adjust the minimum block size.

- `number`: size in pixels.
- `` `${number}%` ``: size in percentages of the available space.
### minInlineSize
Adjust the minimum inline size.

- `number`: size in pixels.
- `` `${number}%` ``: size in percentages of the available space.
### padding
Adjust the padding.

To shorten the code, it is possible to specify all the padding for all edges of the box in one property.

- `base` means block-start, inline-end, block-end and inline-start paddings are `base`.
- `base none` means block-start and block-end paddings are `base`, inline-start and inline-end paddings are `none`.
- `base none large` means block-start padding is `base`, inline-end padding is `none`, block-end padding is `large` and inline-start padding is `none`.
- `base none large small` means block-start padding is `base`, inline-end padding is `none`, block-end padding is `large` and inline-start padding is `small`.
- `true` applies a default padding that is appropriate for the component.

Learn more about the 1-to-4-value syntax at https://developer.mozilla.org/en-US/docs/Web/CSS/Shorthand_properties#edges_of_a_box
### paddingBlock
Adjust the block-padding.

- `base none` means block-start padding is `base`, block-end padding is `none`.
### paddingBlockEnd
Adjust the block-end padding.
### paddingBlockStart
Adjust the block-start padding.
### paddingInline
Adjust the inline padding.

- `base none` means inline-start padding is `base`, inline-end padding is `none`.
### paddingInlineEnd
Adjust the inline-end padding.
### paddingInlineStart
Adjust the inline-start padding.
### rowGap
Adjust spacing between children in the block axis
### AccessibilityRole

'main' | 'header' | 'footer' | 'section' | 'aside' | 'navigation' | 'ordered-list' | 'list-item' | 'list-item-separator' | 'unordered-list' | 'separator' | 'status' | 'alert' | 'generic'
### MainAxisAlignment

'start' | 'center' | 'end' | 'space-between' | 'space-around' | 'space-evenly'
### SpacingKeyword

'none' | 'small' | 'base' | 'large'
### MaybeTwoBoxEdgesShorthandProperty

T | `${T} ${T}`
### CrossAxisAlignment

'start' | 'center' | 'end' | 'baseline'
### MaybeAllBoxEdgesShorthandProperty

T | `${T} ${T}` | `${T} ${T} ${T}` | `${T} ${T} ${T} ${T}`
## Related
- [InlineStack](/docs/api/admin-extensions/components/structure/Stack)