Is there a way in React Native to set the style for standard elements without adding a style tag to each and every one? Like for example I want to alter the style for these:
<Text>This is test</Text>
<Text>This is also text</Text>
<Text>And so is this</Text>
As I understand it the only way to say a margin indent is to do this:
<Text style={styles.indentText}>This is test</Text>
<Text style={styles.indentText}>This is also text</Text>
<Text style={styles.indentText}>And so is this</Text>
In ordinary website CSS you can obviously just set some styles for all HTML elements without needing to add a class or ID to them. How is it done in React Native?
You can set an abstraction layer just for it:
IndentedText = React.createClass({
render: () {
<Text style={styles.indentText}>{this.props.text}</Text>
}
})
And then in your other components:
<IndentedText text={"This is a text"} />
<IndentedText text={"This is also a text"} />
<IndentedText text={"And so is this"} />
Related
<View
style={{
flexDirection: "row",
}}
>
<Text
style={{
flex: 1,
}}
>
By continuing, you agree to our{" "}
<Pressable
onPress={...}
>
<Text>
Terms of Service
</Text>
</Pressable>
</Text>
</View>
"Terms of Service" is printed higher than "By continuing, you agree to our". How do I vertically align them?
Or more precisely - how do I get the Pressable Text to vertically align to the bottom?
This is a bug in React Native itself. There are several open reports of this bug on React Native's GitHub, but the chances of it being fixed don't look good:
https://github.com/facebook/react-native/issues/30375 - for the general problem of Views nested in Text being mis-aligned on Android, and a core contributor responded, but appeared to get derailed and stuck in some details specific to mimicking superscript and subscript.
https://github.com/facebook/react-native/issues/31955 - specific to Pressable and someone posted a PR to fix it, but Facebook closed it because no-one from Facebook got around to reviewing it before it became stale and out of date with the main branch.
There's also some discussion in this issue comment, but the issue got closed.
In React Native >= 0.65, if your inline pressable element uses only text styles, you can work around this issue by using <Text> with onPress (and onPressIn and onPressOut to style the pressed state). Crude example:
/**
* Like a simplified Pressable that doesn't look broken inline in `Text` on Android
*/
const TextButton = ({ children, onPress, style, ...rest } => {
const [pressed, setPressed] = useState(false)
const onPressIn = () => setPressed(true)
const onPressOut = () => setPressed(false)
return (
<Text
onPress={onPress}
onPressIn={onPressIn}
onPressOut={onPressOut}
style={typeof style === 'function' ? style({ pressed }) : style}
{...rest}
>
{typeof children === 'function' ? children({ pressed }) : children}
</Text>
)
}
Beware, however, that there are also bugs around selecting interactive elements nested inside text using accessibility tools. If you can simply avoid nesting the interactive element in text, and have it on its own line, that's probably better: link-like interactive nested text isn't well supported in React Native currently.
On older versions of React Native before 0.65, Text didn't support onPressIn or onPressOut:
If you don't need Pressable's pressed state, use Text instead of Pressable (as the asker did: https://stackoverflow.com/a/66590787/568458)
If you do need pressed state, Text doesn't support the required onPressIn/Out handlers. However, TouchableWithoutFeedback does support those, and works by injecting props into its child so the Text will remain Text with no wrapping View. Wrap a Text in TouchableWithoutFeedback and pass the touchable onPress with onPressIn and onPressOut handlers and store the pressed state yourself.
/**
* Like a simplified Pressable that doesn't look broken inline in `Text` on Android
*/
const TextButton = ({ children, onPress, style, ...rest } => {
const [pressed, setPressed] = useState(false)
const onPressIn = () => setPressed(true)
const onPressOut = () => setPressed(false)
// TouchableWithoutFeedback modifies and returns its child; this returns `Text`
// plus press in/out events attached that aren't supported by Text directly.
return (
<TouchableWithoutFeedback
onPress={onPress}
onPressIn={onPressIn}
onPressOut={onPressOut}
>
<Text
style={typeof style === 'function' ? style({ pressed }) : style}
{...rest}
>
{typeof children === 'function' ? children({ pressed }) : children}
</Text>
</TouchableWithoutFeedback>
)
}
Warning: if you're also using React Native Web and React Navigation, don't use the TouchableWithoutFeedback approach on Web, use pure Pressable on web, because React Navigation's navigate functions don't reliably work when passed to Touchable*s on Web due to a quirk of how the event handlers are set up (but they do work in Pressable), and this issue doesn't exist on Web.
Ended up doing this differently, using the onPress property of the <Text> component and finally wrapping all <Text> components in another <Text> component to have a proper line break:
<View>
<Text>
<Text>
By continuing, you agree to our{" "}
</Text>
<Text onPress={() => {...}}>
Terms of Service
</Text>
<Text>
{" "}and our{" "}
</Text>
<Text onPress={() => {...}}>
Privacy Policy
</Text>
</Text>
</View>
The snippet below should work but hard to understand without giving a shot. If you can provide screenshots I can help more in sake of getting a more proper result.
<View>
<Text style={{
display: 'flex',
flexDirection: 'row',
justifyContent: 'space-between',
alignItems: 'center'
}}>
By continuing, you agree to our{" "}
<Pressable
onPress={() => {
navigate("LegalStack", { screen: "Terms" });
}}
>
<Text style={{margin: 'auto'}}>
Terms of Service
</Text>
</Pressable>
</Text>
</View>
I found a very hackidy-hack solution...
<Text selectable={true}>
<Text>if you click</Text>
<TouchableOpacity
style={{flexDirection: 'row'}}
onPress={() => Linking.openURL("https://www.google.com")}
>
<Text
style={{
alignSelf: 'flex-end',
marginBottom: -4,
}}
>
here
</Text>
</TouchableOpacity>
<Text>, it will open google</Text>
</Text>
By default the flexDirection is column. Change it to flexDirection:"row"
I have an Input from react native elements which looks like this
<Input
placeholderTextColor={constants.inputPlaceholderFontColor}
inputContainerStyle={{marginTop: 30, borderBottomColor: constants.dimmedFontColor}}
placeholder='Spieleranzahl'
keyboardType='numeric'
leftIconContainerStyle={{marginRight: 10, marginBottom: 8}}
leftIcon={
<Icon
name='user'
size={ 24 }
color= {constants.iconColor}/>
}
onChangeText={input => this.setState({numberOfPlayers: input})}
I tried to set the color by
style={{color: 'white'}}
inputStyle={{color: 'white'}}
inputContainerStyle={{color: 'white'}}
The documentation says: "This component inherits all native TextInput props that come with a standard React Native TextInput element, along with the following..." so I dont understand why the style property doesn't work because it works with the standard TextInput component.
Also, the documentation says about inputStyle: "style that will be passed to the style props of the React Native TextInput" so that should also work because this is the way to set color on the standard Text component.
Am I missing something?
I've created an example on snack.expo and inputStyle works perfectly on both iOS and Android. Most probably there is another issue, that's why I would recommend to reimplement my simple example and see if it works.
Update: Maybe only your placeholdertext is shown. I can't see the place in your code, where you pass the value prop to your input.
Demo:
https://snack.expo.io/Yunjp2ozw
Output:
Code:
export default function App() {
const [text, setText] = React.useState('Test');
return (
<View style={styles.container}>
<Input
value={text}
onChangeText={(text) => setText(text)}
inputStyle={{'color': 'red'}}
/>
</View>
);
}
I know I'm just having a syntax issue, but here goes.
I'm building a weather app where the background image source changes based on weather conditions. My quotes and weather desc work, but having trouble setting the background image based on the same conditions.
const weatherCases = {
"clear sky": {
title: "clear sky",
background: "../assets/sunnyBackground.png",
quote1: "My whole life has been sunshine. I like sunshine, in a certain way.",
}}
return (
<ImageBackground source={weatherCases[weatherName].background} style={styles.forecastContainer}>
<View style={styles.forecastTopContainer}>
<View>
<Text style={styles.quoteText} >{weatherCases[weatherName]["quote" + randomQuoteNumber.toString()]}</Text>
</View>
</View>
<View style={styles.forecastBottomContainer}>
<View style={styles.forecastImageContainer}>
<Text>IMAGE</Text>
</View>
<View style={styles.forecastTempContainer}>
<Text>{city}</Text>
<Text>{temp}°</Text>
<Text>{weatherCases[weatherName].title}</Text>
<Text>{hum}% Humidity</Text>
</View>
</View>
</ImageBackground>
You can define a conditional variable which may be inside the json or state object and conditionally pass the source as follows.
<ImageBackground source={this.state.conditional?require('./assets/snack-icon.png'):null}>
Here is a expo link
You need to specifically require() every image resource that you will use. ImageBackground source prop expects the result of this require
const sunnyBg = require("../assets/sunnyBackground.png")
...
"clear sky": {
title: "clear sky",
background: sunnyBg,
quote1: "My whole life has been sunshine. I like sunshine, in a certain way.",
}}
import LadyInGrass from '../../../assets/images/lady_in_grass.jpg';
<ImageBackground
style={styles.imageStyle}
source={imageSource ?? LadyInGrass}>
</ImageBackground>
I've been trying to include code examples in a style guide for a React Native project and have had trouble finding a way to include the tags without React Native trying to render them itself.
I was hoping to simulate something sort of like Stackoverflow does with it's codeblocks like this:
// Example code for implementing custom button:
<CustomButton
color="primary"
title="Submit"
/>
So my code that breaks looks something like this:
<View>
<Text>
// Example code for implementing custom button:
<CustomButton
color="primary"
title="Submit"
/>
</Text>
</View>
Because React Native tries to render the Button and throws errors.
Is there something similar to HTML's <code> tag inside of React Native or some custom way of achieving the same functionality?
One way to make this work is storing the text as a string in some variable and just rendering that inside the container:
let codeBlock = "<CustButton \n\tcolor=\"primary\" \n\ttitle=\"Placeholder\" \n/>"
<View>
<Text>
// Example code for implementing custom button:
{codeBlock}
</Text>
</View>
with jsx-to-string, you can
<View>
<Text>
{jsxToString(
<CustomButton color="primary" title="Submit" />
)}
</Text>
</View>
This way you can reuse your jsx object easily instead of convert to string manually.
How to set <Text> some text </Text> as upper case in react native?
<Text style={{}}> Test </Text>
Need to show that Test as TEST.
iOS textTransform support has been added to react-native in 0.56 version. Android textTransform support has been added in 0.59 version. It accepts one of these options:
none
uppercase
lowercase
capitalize
The actual iOS commit, Android commit and documentation
Example:
<View>
<Text style={{ textTransform: 'uppercase'}}>
This text should be uppercased.
</Text>
<Text style={{ textTransform: 'capitalize'}}>
Mixed:{' '}
<Text style={{ textTransform: 'lowercase'}}>
lowercase{' '}
</Text>
</Text>
</View>
#Cherniv Thanks for the answer
<Text style={{}}> {'Test'.toUpperCase()} </Text>
use text transform property in your style tag
textTransform:'uppercase'
React Native .toUpperCase() function works fine in a string but if you used the numbers or other non-string data types, it doesn't work. The error will have occurred.
Below Two are string properties:
<Text>{props.complexity.toUpperCase()}</Text>
<Text>{props.affordability.toUpperCase()}</Text>
use <Text style={{textTransform: 'uppercase'}}>Test
I am using "` `" and "${}" referenced to the variable, this is will turn it to the string, after that by using .toUppercase() function.
`${todo.title}`.toUppercase() }
For example:
import React from 'react';
const Todo = ({ todo }) => {
console.log("DEBUG:<components/todo.js>:",todo)
return (
<article className="Todo" style={{ backgroundColor: todo.completed ? 'aqua' : '#f9a1a1' }}>
<div className="Todo-info">
<h3>{ typeof todo.title === "string" && `${todo.title}`.toUpperCase() }</h3>
</div>
</article>
);
};
export default Todo;
There are 2 ways to make text to uppercase in React Native
1. use textTransform in styles of text to change the text in uppercase
e.g
<Text style={{ textTransform: 'uppercase'}}>
Some text
</Text>
textTransform may have following 4 possible value
none (default)
uppercase
lowercase
capitalize
2. you can also make text to upper or lower case by using Javascript's method i.e .toUpperCase() and .toLowerCase() to do so
e.g
<Text>{'Some text'.toUpperCase()}</Text>