Before-After comparison slider for react-native with hooks and functional components

This is a comparison slider component to compare two images, components and etc. This is an improvised version of Malik Aliyev's react-native-before-after-slider.

Installation

npm i react-native-before-after-slider-v2

Expo

Open project in the browser

Demo

API

Property	Optional	Default	Description
width	yes	screen width	width of the slider
height	yes	width/2	height of the slider
draggerWidth	yes	50	width of the dragger component
initial	yes	0	initial position of the dragger
onMoveStart	yes	empty	function to call on dragger move start
onMove	yes	empty	function to call on dragger move
onMoveEnd	yes	empty	function to call on dragger move end

Usage

import React, {useState} from 'react';
import { Text, StyleSheet, View, Dimensions, Image, Platform, ScrollView } from 'react-native';
import Compare, { Before, After, DefaultDragger, Dragger } from 'react-native-before-after-slider-v2';
 
 
 
function Slider() {
    const deviceWidth = Dimensions.get("window").width;
const deviceHeight = Dimensions.get("window").height;
const [state, setState] = useState({scrollEnabled: true})
 
const onMoveStart =() =>{
    setState({scrollEnabled: false});
}
const onMoveEnd = () => {
    setState({scrollEnabled: true});
}
    return (
        <ScrollView style={{marginTop: 50}} scrollEnabled={state.scrollEnabled} contentContainerStyle={{alignItems:'center'}}>
<StatusBar hidden/>
        <Text style={{marginBottom: 20, color: '#333', paddingLeft: 20, fontSize: 20}}>Default Dragger</Text>
        <Compare initial={deviceWidth/2} draggerWidth={50} width={deviceWidth-20} onMoveStart={onMoveStart} onMoveEnd={onMoveEnd}>
          <Before>
            <Image source={{uri:'https://firebasestorage.googleapis.com/v0/b/milanlaser-fcb24.appspot.com/o/omaha_bw.jpg?alt=media&token=9864378d-74d9-4579-830d-a56e50dc017d'}} style={{width: deviceWidth-20, height: deviceWidth/2}} />
          </Before>
          <After>
            <Image source={{uri:'https://firebasestorage.googleapis.com/v0/b/milanlaser-fcb24.appspot.com/o/omaha_color.jpg?alt=media&token=7b3c5be6-ee90-40ec-9f1c-4b52ce655322'}} style={{width: deviceWidth-20, height: deviceWidth/2}} />
          </After>
          <DefaultDragger />
        </Compare>
        <Text style={{marginVertical: 20, color: '#333', paddingLeft: 20, fontSize: 20}}>Custom Dragger</Text>
        <Compare initial={deviceWidth/2} draggerWidth={50} width={deviceWidth-20} onMoveStart={onMoveStart} onMoveEnd={onMoveEnd}>
          <Before>
            <Image source={{uri:'https://firebasestorage.googleapis.com/v0/b/milanlaser-fcb24.appspot.com/o/omaha_bw.jpg?alt=media&token=9864378d-74d9-4579-830d-a56e50dc017d'}} style={{width: deviceWidth-20, height: deviceWidth/2}} />
          </Before>
          <After>
            <Image source={{uri:'https://firebasestorage.googleapis.com/v0/b/milanlaser-fcb24.appspot.com/o/omaha_color.jpg?alt=media&token=7b3c5be6-ee90-40ec-9f1c-4b52ce655322'}} style={{width: deviceWidth-20, height: deviceWidth/2}} />
          </After>
          <Dragger>
            <View style={{position: 'absolute', top: 0, right: 24, bottom: 0, left: 24, backgroundColor: '#fff', opacity: .6}}></View>
            <View style={{position: 'absolute', top: deviceWidth/4, left: 10, backgroundColor: '#fff', opacity: .9, width: 30, height: 30, marginTop: -15, transform: [{ rotate: '45deg'}]}}></View>
          </Dragger>
        </Compare>
       
 
      </ScrollView>
    )
}
 
export default Slider