reactjs - How to use const in react-native?

Question

I added a const but I am not able to access it in styles

It is giving the error not able to find the variable size

import React, {  useState } from 'react'; //import useState
    import DropDownPicker from 'react-native-dropdown-picker';
    import { StyleSheet, Text, View, TextInput,StatusBar, SafeAreaView,Image,Button,Alert} from 'react-native';
    import Icon from 'react-native-vector-icons/Feather';
    
    
    export default function App() {
        const [size, setSize] = useState('95%')
        const [search, setSearch] = useState(''); //add this line
        
      return (      
        
        <SafeAreaView>
          <View style={styles.container}>
            <TextInput 
              onChangeText={(text) => setSearch(text)}
              onFocus={()=>setSize(1)}
              placeholder="Search"
              style={styles.searchbox}     
                                 
            ></TextInput>   
    
          <View style={styles.makecentral} >   
            {search.length < 1 ? <Image               
                style={styles.tinyLogo}
                source={require('./assets/icons8_search_200px_3.png')}        
              /> : ( 
                  null  //add clear text image and clear search text
                  
              )}
          
          </View>
                <View style={{flexDirection:'row'}}>
    
                  <View elevation={2}  style={{flex:3,backgroundColor:'#ffffff',height:40,marginTop:10,marginLeft:'2.5%',borderBottomLeftRadius:5,borderTopLeftRadius:5}}>
                    <Text style={{textAlign:'center',fontSize:20,color:'#FF7B00',marginTop:7}}>
                      Category
                    </Text>
                  </View>
                  
                  <View elevation={2} style={{backgroundColor:'#FF7B00',height:40,flex:5,marginTop:10,borderTopRightRadius:5,borderBottomRightRadius:5,marginRight:'2.5%'}}>
         
                  <DropDownPicker
                      items={[
                          {label: 'USA', value: 'usa', icon: () => <Icon name="flag" size={18} color="#900" />, hidden: true},
                          {label: 'UK', value: 'uk', icon: () => <Icon name="flag" size={18} color="#900" />},
                          {label: 'France', value: 'france', icon: () => <Icon name="flag" size={18} color="#900" />},
                      ]}
                      
                      containerStyle={{height: 40}}
                      style={{backgroundColor: '#fafafa'}}
                      
                   
                    />
    
                  </View>
                 
                
                </View>
    
        </View>
        </SafeAreaView>
      );
    }
    
    
    const styles = StyleSheet.create({
      container: {    
        backgroundColor: '#fff',    
        
      },
    
      searchbox:{
        backgroundColor:'#f2f2f2',
        marginTop : StatusBar.currentHeight+5,
        height : 50,
        width : '95%',
        borderRadius : 20,
        textAlignVertical:'center',
        textAlign : 'center',
        alignItems:'center',        
      },
    
      tinyLogo: {
        position : 'absolute',
        width: 30,
        height: 30,
        
        opacity: 0.5,
        marginTop: -40,    
      },
    
      makecentral: {
        
        alignItems:'center',
        marginRight:80,    
      },
    
      category:{
        backgroundColor:'#f2f2f2',
        height:50,
        width:'90%',
        alignContent:'center',
    
    
      }
    })

;

question from:https://stackoverflow.com/questions/66045608/how-to-use-const-in-react-native

Answer 1

if you are supposed to use the dynamic style in your component or views then you have to put it as inline style like the below example:

<MyComponent style={{ ...styles.searchbox, width: MY_DYNAMIC_SIZE }}/>