This is in React Native (JSX) code, updated to today:
<View style = {styles.viewStyleForLine}></View>
const styles = StyleSheet.create({
viewStyleForLine: {
borderBottomColor: "black",
borderBottomWidth: StyleSheet.hairlineWidth,
alignSelf:'stretch',
width: "100%"
}
})
you can use either alignSelf:'stretch'
or width: "100%"
both should work...
and,
borderBottomWidth: StyleSheet.hairlineWidth
here StyleSheet.hairlineWidth
is the thinnest,
then,
borderBottomWidth: 1,
and so on to increase thickness of the line.