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StyleHelper

This is a helper for authoring conditional values for property styles.

Write complex conditional styles based on one or more conditions, such as viewport sizes and interactive states, in a concise and expressive way.

Anchor to stylehelperStyleHelper

Anchor to default default <T>(defaultValue: T) => <T, > required: Sets an optional default value to use when no other condition is met.
Anchor to when when <T>(conditions: , value: T) => <T, > required: Adjusts the style based on different conditions. All conditions, expressed as a literal object, must be met for the associated value to be applied.

The when method can be chained together to build more complex styles.

StylesConditionalStyle

conditionals

An array of conditional values.

StylesConditionalValue<T, AcceptedConditions>[]

default
The default value applied when none of the conditional values specified in `conditionals` are met.
```
T
```

export interface StylesConditionalStyle<
  T,
  AcceptedConditions extends StylesBaseConditions = StylesBaseConditions,
> {
  /**
   * The default value applied when none of the conditional values
   * specified in `conditionals` are met.
   */
  default?: T;
  /**
   * An array of conditional values.
   */
  conditionals: StylesConditionalValue<T, AcceptedConditions>[];
}

StylesConditionalValue

conditions
The conditions that must be met for the value to be applied. At least one condition must be specified.
```
AcceptedConditions
```
value
The value that will be applied if the conditions are met.
```
T
```

export interface StylesConditionalValue<
  T,
  AcceptedConditions extends StylesBaseConditions = StylesBaseConditions,
> {
  /**
   * The conditions that must be met for the value to be applied. At least one
   * condition must be specified.
   */
  conditions: AcceptedConditions;
  /**
   * The value that will be applied if the conditions are met.
   */
  value: T;
}

StylesBaseConditions

focus
```
true
```
hover
```
true
```
resolution
```
1 | 1.3 | 1.5 | 2 | 2.6 | 3 | 3.5 | 4
```
viewportInlineSize
```
{ min: ViewportInlineSize; }
```

export interface StylesBaseConditions {
  viewportInlineSize?: {min: ViewportInlineSize};
  hover?: true;
  focus?: true;
  resolution?: 1 | 1.3 | 1.5 | 2 | 2.6 | 3 | 3.5 | 4;
}

ViewportInlineSize

'extraSmall' | 'small' | 'medium' | 'large'

StylesConditions

focus
```
true
```
hover
```
true
```
viewportInlineSize
```
{ min: ViewportInlineSize; }
```

export interface StylesConditions {
  viewportInlineSize?: {min: ViewportInlineSize};
  hover?: true;
  focus?: true;
}

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Import the Style helper

import {

reactExtension,

Style,

View,

} from '@shopify/ui-extensions-react/checkout';

export default reactExtension('purchase.checkout.block.render', () => (

));

function Extension() {

return (

<View

maxInlineSize={Style.default(200)

.when({viewportInlineSize: {min: 'small'}}, 300)

.when({viewportInlineSize: {min: 'medium'}}, 400)

.when({viewportInlineSize: {min: 'large'}}, 800)}

Responsive Content

</View>

);

}

Examples

Import the Style helper

React

import {
  reactExtension,
  Style,
  View,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension('purchase.checkout.block.render', () => (
  <Extension />
));

function Extension() {
  return (
    <View
      maxInlineSize={Style.default(200)
        .when({viewportInlineSize: {min: 'small'}}, 300)
        .when({viewportInlineSize: {min: 'medium'}}, 400)
        .when({viewportInlineSize: {min: 'large'}}, 800)}
    >
      Responsive Content
    </View>
  );
}

JS

import {Style, View, extension} from '@shopify/ui-extensions/checkout';

export default extension('purchase.checkout.block.render', (root) => {
  const view = root.createComponent(
    View,
    {
      border: 'base',
      padding: 'base',
      maxInlineSize: Style.default(200)
        .when({viewportInlineSize: {min: 'small'}}, 300)
        .when({viewportInlineSize: {min: 'medium'}}, 400)
        .when({viewportInlineSize: {min: 'large'}}, 800),
    },
    'Responsive Content',
  );

  root.appendChild(view);
});

Anchor to conditionsConditions

The following conditions are supported for conditional styles.

Multiple conditions can be set on the same when method.

Name	Type	Description
`"hover"`	`true`	This condition is met when an element is hovered on with the cursor (mouse pointer).
`"focus"`	`true`	This condition is met when an element is clicked, tapped on or selected using the Tab key.
`viewportInlineSize`	`{min: "small" \| "medium" \| "large"}`	This condition is met when the device matches the minimum width.

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Anchor to examplesExamples

This section provides examples of conditions.

Anchor to example-default-style-with-conditionsDefault Style With Conditions

Default styling can be combined with specific conditions. In this example, the Grid’s children will be stacked by default and side by side on viewports above the small breakpoint.

Anchor to example-simple-conditionSimple Condition

Using simple conditional styling enables you to specify a styling change when a condition is met. In this example, the View’s padding will be loose on hover.

Anchor to example-conditionally-hiding-contentConditionally hiding content

Using the display property with conditional styles enables you to hide content for certain viewport sizes. In this example, the View will be hidden on small and above screen sizes.

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Default Style With Conditions

React

<Grid

columns={Style.default('fill').when({viewportInlineSize: {min: 'small'}}, [

'30%',

'70%',

])}

<View>Content</View>

</Grid>;

Examples

Default Style With Conditions
Description
Default styling can be combined with specific conditions. In this example, the Grid’s children will be stacked by default and side by side on viewports above the <code>small</code> breakpoint.
React
```
<Grid
  columns={Style.default('fill').when({viewportInlineSize: {min: 'small'}}, [
    '30%',
    '70%',
  ])}
>
  <View>Content</View>
  <View>Content</View>
</Grid>;
```

Simple Condition

Description

Using simple conditional styling enables you to specify a styling change when a condition is met. In this example, the View’s padding will be <code>loose</code> on hover.

React

<Pressable
  onPress={() => alert('press')}
  border={Style.default(['base', 'dotted']).when(
    {viewportInlineSize: {min: 'small'}},
    ['base', 'dotted', 'none', 'base'],
  )}
>
  Content
</Pressable>;

Conditionally hiding content
Description
Using the `display` property with conditional styles enables you to hide content for certain viewport sizes. In this example, the View will be hidden on small and above screen sizes.
React
```
<View
  display={Style.default('auto').when(
    {viewportInlineSize: {min: 'small'}},
    'none',
  )}
>
  Content
</View>;
```

Anchor to relatedRelated

ComponentInlineLayout

ComponentInlineSpacer

ComponentSkeletonImage

ComponentView