React Native Styling

This Article Part of React Native Tutorial Series want to start from scrach follow below link

https://infinitbility.com/react-native/table-of-contents

Today, we learn how many ways to write CSS in react native. the CSS in react a native little bit different from actual CSS.

Inline Style
Internal style
External Style
Use multiple styles in a single component
Create multiple styles constant and import

Inline Style

However, this is not the best practice because it can be hard to read the code. but for a knowledge check out the below example.

You can add styling to your component using style props you simply add style props to your element it accepts an object of properties.

1import React, {Component} from 'react';
2import {Platform, StyleSheet, Text, View} from 'react-native';
3export default class App extends Component<Props> {
4    render() {
5        return (
6            <View style={{flex:1,justifyContent:"center",backgroundColor:"#fff", alignItems:"center"}}>
7                <View style={{width:200,height:150,backgroundColor:"red",padding:10}}>
8                    <Text style={{fontSize:20, color:"#666"}}>Inline Style</Text>
9                </View>
10            </View>
11        );
12    }
13}

Internal style

if you have a large code base or you want to set many properties to your elements, writing our styling rules directly inside style props will make our code more complex that’s why React Native give us another way that let us write a concise code using StyleSheet method: First, make sure to import StyleSheet from react-native

1import { StyleSheet} from 'react-native';

And try to assign some style properties using create method that takes an object of properties.

1import React from 'react';
2import { StyleSheet, Text, View } from 'react-native';
3
4const LotsOfStyles = () => {
5    return (
6      <View style={styles.container}>
7        <Text style={styles.red}>just red</Text>
8        <Text style={styles.bigBlue}>just bigBlue</Text>
9        <Text style={[styles.bigBlue, styles.red]}>bigBlue, then red</Text>
10        {/* add multiple style in single component */}
11        <Text style={[styles.red, styles.bigBlue]}>red, then bigBlue</Text>
12      </View>
13    );
14};
15
16const styles = StyleSheet.create({
17  container: {
18    marginTop: 50,
19  },
20  bigBlue: {
21    color: 'blue',
22    fontWeight: 'bold',
23    fontSize: 30,
24  },
25  red: {
26    color: 'red',
27  },
28});
29
30export default LotsOfStyles;

External Style

External Style is the best way to write & organize CSS in react native. learn with the below example.

styles.js

1import { StyleSheet } from 'react-native';
2
3export default const styles = StyleSheet.create({
4  container: {
5    marginTop: 50,
6  },
7  bigBlue: {
8    color: 'blue',
9    fontWeight: 'bold',
10    fontSize: 30,
11  },
12  red: {
13    color: 'red',
14  },
15});

import style.js on your react native screen.

LotsOfStyles.js

1import React from 'react';
2import { Text, View } from 'react-native';
3import styles from 'styles';
4
5const LotsOfStyles = () => {
6    return (
7      <View style={styles.container}>
8        <Text style={styles.red}>just red</Text>
9        <Text style={styles.bigBlue}>just bigBlue</Text>
10        <Text style={[styles.bigBlue, styles.red]}>bigBlue, then red</Text>
11        <Text style={[styles.red, styles.bigBlue]}>red, then bigBlue</Text>
12      </View>
13    );
14};
15
16export default LotsOfStyles;

Use multiple styles in a single component

many time we need to multiple styles class for single component, learn with below example.

1{/* add multiple style in single component */}
2<Text style={[styles.red, styles.bigBlue]}>red, then bigBlue</Text>

Create multiple styles constant and import

Learn below example on how to create multiple styles constant & import in your react native screen.

styles.js

1import { StyleSheet } from 'react-native';
2
3const TextStyles = StyleSheet.create({
4  bigBlue: {
5    color: 'blue',
6    fontWeight: 'bold',
7    fontSize: 30,
8  },
9  red: {
10    color: 'red',
11  },
12});
13
14const ScreenStyles = StyleSheet.create({
15    container: {
16        marginTop: 50,
17    },
18});
19
20export {TextStyles, ScreenStyles};

import on your react native screen

1import { TextStyles, ScreenStyles } from 'styles';

React Native Styling

Inline Style

Internal style

External Style

styles.js

LotsOfStyles.js

Use multiple styles in a single component

Create multiple styles constant and import

styles.js

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