alexZajac / React Native Skeleton Content

React Native Skeleton Content

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React native Skeleton Content, a simple yet fully customizable component made to achieve loading animation in a Skeleton-style. Works in both iOS and Android.

New Features

• The package has been rewritten to Hooks and is using the declarative react-native-reanimated package for animations
• It now supports nested layouts for children bones, see an example on this snack
• It finally supports percentages dimensions for bones, for any type of animation!

• React Native Skeleton Content
  • Installation
  • Usage
  • Props
  • Examples
  • Playground

Installation

npm install react-native-skeleton-content

Usage

1. Import react-native-skeleton-content:

import SkeletonContent from 'react-native-skeleton-content';

2. Once you create the SkeletonContent, you have two options:

• Child Layout : The component will figure out the layout of its bones with the dimensions of its direct children.
• Custom Layout : You provide a prop layout to the component specifying the size of the bones (see the Examples section below). Herunder is the example with a custom layout. A key prop for each child is optionnal but highly recommended.

export default function Placeholder() {
  return (
    <SkeletonContent
      containerStyle={{ flex: 1, width: 300 }}
      isLoading={false}
      layout={[
        { key: 'someId', width: 220, height: 20, marginBottom: 6 },
        { key: 'someOtherId', width: 180, height: 20, marginBottom: 6 }
      ]}
    >
      <Text style={styles.normalText}>Your content</Text>
      <Text style={styles.bigText}>Other content</Text>
    </SkeletonContent>
  );
}

3. Then simply sync the prop isLoading to your state to show/hide the SkeletonContent when the assets/data are available to the user.

export default function Placeholder () {
  const [loading, setLoading] = useState(true);
  return (
    <SkeletonContent
       containerStyle={{flex: 1, width: 300}}
        isLoading={isLoading}>
        {...otherProps}
    />
  )
}

Props

Note: The Easing type function is the one provided by react-native-reanimated, so if you want to change the default you will have to install it as a dependency.

Examples

See the playground section to experiment : 1 - Changing the direction of the animation (animationDirection prop) :

export default function Placeholder () {
  return (
    <SkeletonContent
        containerStyle={{flex: 1, width: 300}}
        animationDirection="horizontalLeft"
        isLoading={true}>
        ...
    />
  )
}

2 - Changing the colors and switching to "pulse" animation (boneColor, highlightColor and animationType prop) :

export default function Placeholder () {
  return (
    <SkeletonContent
        containerStyle={{flex: 1, width: 300}}
        boneColor="#121212"
        highlightColor="#333333"
        animationType="pulse"
        isLoading={true}>
        ...
    />
  )
}

3 - Customizing the layout of the bones (layout prop) :

export default function Placeholder () {
  return (
    <SkeletonContent
        containerStyle={{flex: 1, width: 300}}
        animationDirection="horizontalLeft"
        layout={[
        // long line
        { width: 220, height: 20, marginBottom: 6 },
        // short line
        { width: 180, height: 20, marginBottom: 6 },
        ...
        ]}
        isLoading={true}>
        ...
    />
  )
}

Playground

You can test out the features and different props easily on Snack. Don't hesitate to take contact if anything is unclear !