Creating Rounded Borders in React Native Using Elliptical Corners

Currently, my goal is to replicate this specific shape using React Native. The design consists of two shapes overlapping each other: a square and another with top and bottom border-radius (the square acts as a cover to hide the border radius on the top).

Below is the CSS code utilized to create this shape:

#square {
   width: 200px;
   height: 180px;
   background: red;
 }

 #tv {
   position: relative;
   margin-top: 100px;
   width: 200px;
   height: 200px;
   margin: 20px 0;
   background: red;
   border-radius: 100px / 20px;
 }

My challenge lies in the lack of documentation regarding the border-radius property. I am uncertain if it's feasible to achieve elliptical radii similar to what can be done in traditional CSS.

Answer №1

To create a unique elliptical shape

import React, { Component } from 'react';
import { View, StyleSheet } from 'react-native';
//import { Constants } from 'expo';

export default class App extends Component {
  render() {
    return (
      <View style={styles.container}>
      <View style={styles.oval}/>

      </View>
    );
  }
}

const styles = StyleSheet.create({
    oval: {
        width: 100,
        height: 100,
        borderRadius: 50,
        //backgroundColor: 'red',
        borderWidth:2,
        borderColor:'black',
        transform: [
          {scaleX: 2}
        ]
    },
    container:{
      flex:1,
      alignItems:'center',
      justifyContent:'center'
    }
});

Check out the result on this link

This could be a shape similar to what you have described.

import React, { Component } from 'react';
import { View, StyleSheet } from 'react-native';
//import { Constants } from 'expo';

export default class App extends Component {
  render() {
    return (
      <View style={styles.container}>
       <View style={styles.oval}/>
        <View style={styles.square}/>

      </View>
    );
  }
}

const styles = StyleSheet.create({
  square:{
    width:200,
    height:180,
    backgroundColor:'red',
    position:'absolute',
    top:160

  },
    oval: {
        position:'absolute',
        width: 100,
        height: 200,
        borderRadius: 50,
        backgroundColor: 'red',
        //borderWidth:2,
        //borderColor:'black',
        transform: [
          {scaleX: 2}
        ]
    },
    container:{
      flex:1,
      alignItems:'center',
      justifyContent:'center'
    }
});
`

See the updated design on this link

UPDATE

If you want different border-radius for each corner, you can achieve that like so:

 borderTopLeftRadius: '10%',
 borderTopRightRadius: '30%',
 borderBottomLeftRadius: '50%',
 borderBottomRightRadius: '70%',

Try it out on this playground link

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