JAVASCRIPT

textarea react native

<TextInput
	multiline={true}
    numberOfLines={4}
    onChangeText={(val) => setText(val)}
    value={text}
/>

react native text area form

  <View style={styles.textAreaContainer} >
    <TextInput
      style={styles.textArea}
      underlineColorAndroid="transparent"
      placeholder="Type something"
      placeholderTextColor="grey"
      numberOfLines={10}
      multiline={true}
    />
  </View>
...

const styles = StyleSheet.create({
  textAreaContainer: {
    borderColor: COLORS.grey20,
    borderWidth: 1,
    padding: 5
  },
  textArea: {
    height: 150,
    justifyContent: "flex-start",
    textAlignVertical: 'top'
  }
})