How to have Ellipsis effect on Text

I'm having a long text in my app and I need to truncate it and add three dots to the end.

How can I do that in React Native Text element?

Thanks

Use the numberOfLines parameter on a Text component:

<Text numberOfLines={1}>long long long long text<Text>

Will produce:

long long long…

(Assuming you have short width container.)

---

Use the ellipsizeMode parameter to move the ellipsis to the head or middle. tail is the default value.

<Text numberOfLines={1} ellipsizeMode='head'>long long long long text<Text>

Will produce:

…long long text

---

NOTE: The Text component should also include style={{ flex: 1 }} when the ellipsis needs to be applied relative to the size of its container. Useful for row layouts, etc.

use numberOfLines

<Text numberOfLines={1}>long long long long text<Text>

or if you know/or can compute the max character count per row, JS substring may be used.

<Text>{ ((mytextvar).length > maxlimit) ? 
    (((mytextvar).substring(0,maxlimit-3)) + '...') : 
    mytextvar }
</Text>

You can use ellipsizeMode and numberOfLines. e.g

<Text ellipsizeMode='tail' numberOfLines={2}>
  This very long text should be truncated with dots in the beginning.
</Text>

https://facebook.github.io/react-native/docs/text.html

<View 
   style={{
        flexDirection: 'row',
        padding: 10,
    }}
>
  <Text numberOfLines={5} style={{flex:1}}>
       This is a very long text that will overflow on a small device This is a very 
       long text that will overflow on a small deviceThis is a very long text that 
       will overflow on a small deviceThis is a very long text that will overflow 
       on a small device
  </Text>
</View>

<Text ellipsizeMode='tail' numberOfLines={2} style={{width:100}}>
    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam at cursus 
</Text>

Result inside box:

<-- width = 100-->
 -----------------
| Lorem ipsum     |
| dolar sit a...  |
 -----------------

To Achieve ellipses for the text use the Text property numberofLines={1} which will automatically truncate the text with an ellipsis you can specify the ellipsizeMode as "head", "middle", "tail" or "clip" By default it is tail

https://reactnative.dev/docs/text#ellipsizemode

If you want read more behavior, then you can use the react-native-read-more-text library:

npm i react-native-read-more-text --save

<ReadMore
  numberOfLines={1}
  renderTruncatedFooter={(handlePress) => { return <Text onPress={handlePress} style={{ color: 'grey' }}>show more</Text> }}
  renderRevealedFooter={(handlePress) => { return <Text onPress={handlePress} style={{ color: 'grey' }}>show less</Text> }}
>
  <Text>yourText</Text>
</ReadMore>

Docs: https://github.com/expo/react-native-read-more-text

To hide "read more" when the content is less than numberOfLines, you can use ternary operator:

{
  'yourText'.length > 50
  ?
  <ReadMore
    numberOfLines={1}
    renderTruncatedFooter={(handlePress) => { return <Text onPress={handlePress} style={{ color: 'grey' }}>show more</Text> }}
    renderRevealedFooter={(handlePress) => { return <Text onPress={handlePress} style={{ color: 'grey' }}>show less</Text> }}
  >
    <Text>yourText</Text>
  </ReadMore>
  :
  <Text>yourText</Text>
}

const styles = theme => ({
 contentClass:{
    overflow: 'hidden',
    textOverflow: 'ellipsis',
    display: '-webkit-box',
    WebkitLineClamp:1,
    WebkitBoxOrient:'vertical'
 }   
})

render () {
  return(
    <div className={classes.contentClass}>
      {'content'}
    </div>
  )
}