---
title: Stack
description: Organizes elements horizontally or vertically along the block or inline axis. Use to structure layouts, group related components, or control spacing between elements.
api_version: 2025-10
api_name: checkout-ui-extensions
source_url:
  html: https://shopify.dev/docs/api/checkout-ui-extensions/latest/polaris-web-components/structure/stack
  md: https://shopify.dev/docs/api/checkout-ui-extensions/latest/polaris-web-components/structure/stack.md
---

# Stack

Organizes elements horizontally or vertically along the block or inline axis. Use to structure layouts, group related components, or control spacing between elements.

## Properties

* accessibilityLabel

  string

  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.

  Only use this when the element's content is not enough context for users using assistive technologies.

* accessibilityRole

  'aside' | 'footer' | 'header' | 'main' | 'section' | 'status' | 'none' | 'navigation' | 'ordered-list' | 'list-item' | 'list-item-separator' | 'unordered-list' | 'separator' | 'alert' | 'generic'

  Default: 'generic'

  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.

* alignContent

  MaybeResponsive\<Extract\<StackProps$1\['alignContent'], 'normal' | 'space-between' | 'space-around' | 'space-evenly' | 'stretch' | 'center' | 'start' | 'end'>>

  Default: 'normal'

  Aligns the Stack along the cross axis.

* alignItems

  MaybeResponsive\<Extract\<StackProps$1\['alignItems'], 'normal' | 'stretch' | 'center' | 'start' | 'end'>>

  Default: 'normal'

  Aligns the Stack's children along the cross axis.

* background

  'base' | 'subdued' | 'transparent'

  Default: 'transparent'

  Adjust the background of the element.

* blockSize

  MaybeResponsive\<SizeUnitsOrAuto>

  Default: 'auto'

  Adjust the block size.

* border

  BorderShorthand

  Default: 'none' - equivalent to \`none base auto\`.

  Set the border via the shorthand property.

  This can be a size, optionally followed by a color, optionally followed by a style.

  If the color is not specified, it will be `base`.

  If the style is not specified, it will be `auto`.

  Values can be overridden by `borderWidth`, `borderStyle`, and `borderColor`.

* borderRadius

  MaybeAllValuesShorthandProperty\<Extract\<StackProps$1\['borderRadius'], 'none' | 'small-100' | 'small' | 'base' | 'large' | 'large-100' | 'max'>>

  Default: 'none'

  Set the radius of the border.

  [1-to-4-value syntax](https://developer.mozilla.org/en-US/docs/Web/CSS/Shorthand_properties#edges_of_a_box) is supported. Note that, contrary to the CSS, it uses flow-relative values and the order is:

  * 4 values: `start-start start-end end-end end-start`
  * 3 values: `start-start (start-end & end-start) start-end`
  * 2 values: `(start-start & end-end) (start-end & end-start)`

  For example:

  * `small-100` means start-start, start-end, end-end and end-start border radii are `small-100`.
  * `small-100 none` means start-start and end-end border radii are `small-100`, start-end and end-start border radii are `none`.
  * `small-100 none large-100` means start-start border radius is `small-100`, start-end border radius is `none`, end-end border radius is `large-100` and end-start border radius is `none`.
  * `small-100 none large-100 small-100` means start-start border radius is `small-100`, start-end border radius is `none`, end-end border radius is `large-100` and end-start border radius is `small-100`.

* borderStyle

  MaybeAllValuesShorthandProperty\<BorderStyleKeyword> | ""

  Default: '' - meaning no override

  Set the style of the border.

  If set, it takes precedence over the `border` property's style.

  Like CSS, up to 4 values can be specified.

  If one value is specified, it applies to all sides.

  If two values are specified, they apply to the block sides and inline sides respectively.

  If three values are specified, they apply to the block-start, both inline sides, and block-end respectively.

  If four values are specified, they apply to the block-start, block-end, inline-start, and inline-end sides respectively.

* borderWidth

  MaybeAllValuesShorthandProperty\<ReducedBorderSizeKeyword> | ''

  Default: '' - meaning no override

  Set the width of the border.

  If set, it takes precedence over the `border` property's width.

  Like CSS, up to 4 values can be specified.

  If one value is specified, it applies to all sides.

  If two values are specified, they apply to the block sides and inline sides respectively.

  If three values are specified, they apply to the block-start, both inline sides, and block-end respectively.

  If four values are specified, they apply to the block-start, block-end, inline-start, and inline-end sides respectively.

* columnGap

  MaybeResponsive\<SpacingKeyword | "">

  Default: '' - meaning no override

  Adjust spacing between elements in the inline axis.

  This overrides the column value of `gap`.

* direction

  MaybeResponsive<"block" | "inline">

  Default: 'block'

  Sets how the children are placed within the Stack. This uses [logical properties](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_logical_properties_and_values).

* display

  MaybeResponsive<"auto" | "none">

  Default: 'auto'

  Sets the outer display type of the component. The outer type sets a component’s participation in [flow layout](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_flow_layout).

  * `auto`: the component’s initial value. The actual value depends on the component and context.
  * `none`: hides the component from display and removes it from the accessibility tree, making it invisible to screen readers.

* gap

  MaybeResponsive\<MaybeTwoValuesShorthandProperty\<SpacingKeyword>>

  Default: 'none'

  Adjust spacing between elements.

  A single value applies to both axes. A pair of values (eg `large-100 large-500`) can be used to set the inline and block axes respectively.

* id

  string

  A unique identifier for the element.

* inlineSize

  MaybeResponsive\<SizeUnitsOrAuto>

  Default: 'auto'

  Adjust the inline size.

* justifyContent

  MaybeResponsive\<Extract\<StackProps$1\['justifyContent'], 'normal' | 'space-between' | 'space-around' | 'space-evenly' | 'stretch' | 'center' | 'start' | 'end'>>

  Default: 'normal'

  Aligns the Stack along the main axis.

* maxBlockSize

  MaybeResponsive\<SizeUnitsOrNone>

  Default: 'none'

  Adjust the maximum block size.

* maxInlineSize

  MaybeResponsive\<SizeUnitsOrNone>

  Default: 'none'

  Adjust the maximum inline size.

* minBlockSize

  MaybeResponsive\<SizeUnits>

  Default: '0'

  Adjust the minimum block size.

* minInlineSize

  MaybeResponsive\<SizeUnits>

  Default: '0'

  Adjust the minimum inline size.

* overflow

  'hidden' | 'visible'

  Default: 'visible'

  Sets the overflow behavior of the element.

  * `hidden`: clips the content when it is larger than the element’s container. The element will not be scrollable and the users will not be able to access the clipped content by dragging or using a scroll wheel on a mouse.
  * `visible`: the content that extends beyond the element’s container is visible.

* padding

  MaybeResponsive\<MaybeAllValuesShorthandProperty\<PaddingKeyword>>

  Default: 'none'

  Adjust the padding of all edges.

  [1-to-4-value syntax](https://developer.mozilla.org/en-US/docs/Web/CSS/Shorthand_properties#edges_of_a_box) is supported. Note that, contrary to the CSS, it uses flow-relative values and the order is:

  * 4 values: `block-start inline-end block-end inline-start`
  * 3 values: `block-start inline block-end`
  * 2 values: `block inline`

  For example:

  * `large` means block-start, inline-end, block-end and inline-start paddings are `large`.
  * `large none` means block-start and block-end paddings are `large`, inline-start and inline-end paddings are `none`.
  * `large none large` means block-start padding is `large`, inline-end padding is `none`, block-end padding is `large` and inline-start padding is `none`.
  * `large none large small` means block-start padding is `large`, inline-end padding is `none`, block-end padding is `large` and inline-start padding is `small`.

  A padding value of `auto` will use the default padding for the closest container that has had its usual padding removed.

* paddingBlock

  MaybeResponsive\<MaybeTwoValuesShorthandProperty\<PaddingKeyword> | "">

  Default: '' - meaning no override

  Adjust the block-padding.

  * `large none` means block-start padding is `large`, block-end padding is `none`.

  This overrides the block value of `padding`.

* paddingBlockEnd

  MaybeResponsive\<PaddingKeyword | "">

  Default: '' - meaning no override

  Adjust the block-end padding.

  This overrides the block-end value of `paddingBlock`.

* paddingBlockStart

  MaybeResponsive\<PaddingKeyword | "">

  Default: '' - meaning no override

  Adjust the block-start padding.

  This overrides the block-start value of `paddingBlock`.

* paddingInline

  MaybeResponsive\<MaybeTwoValuesShorthandProperty\<PaddingKeyword> | "">

  Default: '' - meaning no override

  Adjust the inline padding.

  * `large none` means inline-start padding is `large`, inline-end padding is `none`.

  This overrides the inline value of `padding`.

* paddingInlineEnd

  MaybeResponsive\<PaddingKeyword | "">

  Default: '' - meaning no override

  Adjust the inline-end padding.

  This overrides the inline-end value of `paddingInline`.

* paddingInlineStart

  MaybeResponsive\<PaddingKeyword | "">

  Default: '' - meaning no override

  Adjust the inline-start padding.

  This overrides the inline-start value of `paddingInline`.

* rowGap

  MaybeResponsive\<SpacingKeyword | "">

  Default: '' - meaning no override

  Adjust spacing between elements in the block axis.

  This overrides the row value of `gap`.

### MaybeResponsive

```ts
T | `@container${string}`
```

### SizeUnitsOrAuto

```ts
SizeUnits | "auto"
```

### SizeUnits

```ts
`${number}px` | `${number}%` | `0`
```

### BorderShorthand

```ts
ReducedBorderSizeKeyword | `${ReducedBorderSizeKeyword} ${ReducedColorKeyword}` | `${ReducedBorderSizeKeyword} ${ReducedColorKeyword} ${BorderStyleKeyword}`
```

### ReducedBorderSizeKeyword

```ts
'large' | 'base' | 'large-100' | 'large-200' | 'none'
```

### ReducedColorKeyword

```ts
'base'
```

### BorderStyleKeyword

```ts
"none" | "solid" | "dashed" | "dotted" | "auto"
```

### MaybeAllValuesShorthandProperty

```ts
T | `${T} ${T}` | `${T} ${T} ${T}` | `${T} ${T} ${T} ${T}`
```

### SpacingKeyword

```ts
SizeKeyword | "none"
```

### SizeKeyword

```ts
"small-500" | "small-400" | "small-300" | "small-200" | "small-100" | "small" | "base" | "large" | "large-100" | "large-200" | "large-300" | "large-400" | "large-500"
```

### MaybeTwoValuesShorthandProperty

```ts
T | `${T} ${T}`
```

### SizeUnitsOrNone

```ts
SizeUnits | "none"
```

### PaddingKeyword

```ts
SizeKeyword | "none"
```

### Examples

* #### Code

  ##### Default

  ```html
  <s-stack direction="inline" gap="base">
    <s-image
      src="https://cdn.shopify.com/plant-1"
      alt="Areca palm in a gray pot"
      inlineSize="auto"
    />
    <s-image
      src="https://cdn.shopify.com/plant-2"
      alt="Fiddle leaf fig in a gray pot"
      inlineSize="auto"
    />
    <s-image
      src="https://cdn.shopify.com/plant-3"
      alt="Snake plant in a gray pot"
      inlineSize="auto"
    />
    <s-image
      src="https://cdn.shopify.com/plant-4"
      alt="Monstera deliciosa in a gray pot"
      inlineSize="auto"
    />
  </s-stack>
  ```

## Preview

![](https://shopify.dev/images/templated-apis-screenshots/checkout-ui-extensions/2025-10/stack-default.png)

## Useful for

* Placing items in rows or columns when sections don't work for your layout.
* Controlling the spacing between elements.

## Considerations

* Stack doesn't add any padding by default. If you want padding around your stacked elements, use `base` to apply the default padding.
* When spacing becomes limited, Stack will always wrap children to a new line.

## Best practices

* Use smaller gaps between small elements and larger gaps between big ones.
* Maintain consistent spacing in stacks across all pages of your app.