A customizable skeleton-like loading placeholder for react native projects using reanimated v3

React Native Reanimated Skeleton

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

THIS REPO IS AN UPGRADE FROM REANIMATED V1 to V3 inspired by https://github.com/alexZajac/react-native-skeleton-content

Installation

npm install react-native-reanimated-skeleton

Usage

Import react-native-reanimated-skeleton:

import Skeleton from 'react-native-reanimated-skeleton';

Once you create the Skeleton, 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). Below is an example with a custom layout. A key prop for each child is optional but highly recommended.

export default function Placeholder() {
  return (
    <Skeleton
      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>
    </Skeleton>
  );
}

With children layout example: More info can be found in the example folder

<Skeleton
  isLoading={true}
  containerStyle={styles.container}
  layout={[
    {
      width: 325,
      height: 325,
      borderRadius: 34,
      marginBottom: 16,
    },
    {
      flexDirection: 'column',
      justifyContent: 'center',
      alignItems: 'center',
      children: [
        {
          width: 119,
          height: 19,
          borderRadius: 16,
          marginBottom: 8,
        },
        {
          width: 234,
          height: 42,
          borderRadius: 16,
        },
      ],
    },
  ]}
>
  <>
    <Text style={styles.normalText}>Your content</Text>
    <Text style={styles.bigText}>Other content</Text>
  </>
</Skeleton>

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

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

Props

Name	Type	Default	Description
isLoading	bool	required	Shows the Skeleton bones when true
layout	array of objects	[]	A custom layout for the Skeleton bones
duration	number	1200 ms	Duration of one cycle of animation
containerStyle	object	flex: 1	The style applied to the View containing the bones
easing	Easing	bezier(0.5, 0, 0.25, 1)	Easing of the bones animation
animationType	string	“shiver”	The animation to be used for animating the bones (see demos below)
animationDirection	string	“horizontalRight”	Used only for shiver animation, describes the direction and end-point (ex: horizontalRight goes on the x-axis from left to right)
boneColor	string	“#E1E9EE”	Color of the bones
highlightColor	string	“#F2F8FC”	Color of the highlight of the bones

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 (
    <Skeleton
        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 (
    <Skeleton
        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 (
    <Skeleton
        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

Don’t hesitate to take contact if anything is unclear !

GitHub

View Github