Content Loader aka Content Placeholder for React Native

Customizable react native content loader for React-Native apps.

No need for external dependencies, it only use View component from react-native. For styling, you can use "barebone" stylesheet from react-native or you can use third party libraries like Nativewind (TailwindCSS for react-native)

Preview

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Installation

Step 1.

npm install @casteasoft/react-native-content-loader --save

or

yarn add @casteasoft/react-native-content-loader

Step 2.

And now you are ready to use it in your code. See example below.

Basic example

const ProfileImage = withViewLoader(View)

<ProfileImage style={{width: 120, height: 120}} isLoading={isLoading}>
  <Image resizeMode="cover" source={{uri: "http://localhost:3000/avatars/cipto.jpg"}} style={{width:"100%", height:"100%"}} />
</ProfileImage>

// or using explicit conditional statement
{
  isLoading ? <ProfileImage style={{width: 120, height: 120}} isLoading={isLoading} /> : <View style={{width: 120, height: 120}} isLoading={isLoading}><Image resizeMode="cover" source={{uri: "http://localhost:3000/avatars/cipto.jpg"}} style={{width:"100%", height:"100%"}} />
</View>
}

Live advanced example

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Advanced example using Nativewind

import { View, Text, TouchableOpacity, Image } from "react-native";
import { withViewLoader } from "@casteasoft/react-native-content-loader";
import { styled } from "nativewind";


 /* =============================
  *  Content Loader Examples @casteasoft/react-native-content-loader
  #  , styling using Nativewind
  * ============================ */

export const ContentLoader = () => {
 return <View >
      {/* Button for toggling isLoading state */}
      <ToggleLoadingBtn
        onPress={() => {
          setIsLoading(!isLoading);
        }}
      >
        <ToggleLoadingText>
          {isLoading ? "Loading ..." : "Completed"}
        </ToggleLoadingText>
      </ToggleLoadingBtn>

      {/* Profile Details */}
      <ProfileContainer>
        <ProfileHeaderContainer>
          <ProfileHeaderImageContainer isLoading={isLoading}>
            <ProfileHeaderImage
              resizeMode="cover"
              source={{ uri: "http:/localhost:3000/sceneries/tandur_padi.jpg" }}
            />
          </ProfileHeaderImageContainer>
          <ProfileImageContainer isLoading={isLoading}>
            <ProfileImage
              resizeMode="cover"
              source={{ uri: "http:/localhost:3000/avatars/elena.jpg" }}
            />
          </ProfileImageContainer>

          <ProfileImageBackground />
        </ProfileHeaderContainer>

        <BioParagraph
          {...{ isLoading }}
          className="mx-auto mt-10 w-80"
          numberOfLines={4}
          loaderColorStyle={{ backgroundColor: "#1e3a8a" }}
        >
          <Text>
            Lorem ipsum dolor sit amet consectetur adipisicing elit. Illum totam
            corrupti necessitatibus quasi dolores eos laboriosam cum!
            Consequatur, laudantium sit facere vitae et nisi dolorum
            accusantium, iure laborum, asperiores veniam.
          </Text>
        </BioParagraph>

        {/*  Styling content loader with style prop only  */}
        {isLoading ? (
          <BioParagraph
            {...{ isLoading }}
            numberOfLines={4}
            style={{
              marginLeft: "auto",
              marginRight: "auto",
              marginTop: 16,
              width: 320,
            }}
          />
        ) : (
          <View className="mx-auto mt-4 w-80">
            <Text>
              Lorem ipsum dolor sit amet consectetur adipisicing elit. Illum
              totam corrupti necessitatibus quasi dolores eos laboriosam cum!
              Consequatur, laudantium sit facere vitae et nisi dolorum
              accusantium, iure laborum, asperiores veniam.
            </Text>
          </View>
        )}
      </ProfileContainer>
      {/* End of Profile Details */}
</View>

/** =============================
 *  Styled Components using Nativewind
 *  =============================
 */
const ViewWithLoader = withViewLoader(View);

const ToggleLoadingBtn = styled(
  TouchableOpacity,
  `items-center self-center justify-center px-4 py-2 mx-4 my-2 bg-gray-900 rounded-lg w-36`
);
const ToggleLoadingText = styled(Text, `text-lg text-white text-font-semibold`);

const ProfileContainer = styled(View, `flex flex-col w-full`);

const ProfileHeaderContainer = styled(
  View,
  `relative flex flex-col items-center mx-auto w-80`
);

const ProfileHeaderImageContainer = styled(ViewWithLoader, `w-full h-32`);

const ProfileHeaderImage = styled(Image, `w-full h-full`);

const ProfileImageContainer = styled(
  ViewWithLoader,
  `absolute z-20 w-16 h-16 border-2 border-gray-100 rounded-full top-24`
);

const ProfileImage = styled(Image, `w-full h-full rounded-full`);

const ProfileImageBackground = styled(
  View,
  `absolute w-16 h-16 border-2 border-gray-100 rounded-full bg-gray-50 top-24`
);
const BioParagraph = ViewWithLoader;

Available Properties

If you use a third party library like Nativewind, the tailwind class will be transformed into an array of style object, therefore there is no className property, for example:

mx-auto mt-4 w-80 will be transformed into [{marginLeft: "auto", marginRight: "auto"}, {marginTop: 16}, {width: 320}]

Property name	Description
duration	: number (default: 3000)
bottomtValue	: minimum value for opacity (default: 0.1)
topValue	: maxmum value for opacity (default: 1)
children	: children element to be displayed
isLoading	: boolean
numberOfLines	: number (the number of paragraph lines)
style	: StyleProp<ViewStyle>
loaderColorStyle	: StyleProp<ViewStyle>, only backgroundColor
	(default: { backgroundColor: "#111827" })

Changelog

Please see the releases tab for the changelog information.

License

MIT

Authors

• Cipto Hadi