border-view-extension.swift

// The SwiftUI Lab: https://swiftui-lab.com
import SwiftUI

struct ContentView: View {
    var body: some View {
        Text("hello world!")
            .padding(20)
            .addBorder(Color.blue, width: 3.0, cornerRadius: 80)
    }
}

extension View {
    public func addBorder<S>(_ content: S, width: CGFloat = 1, cornerRadius: CGFloat) -> some View where S : ShapeStyle {
        return overlay(RoundedRectangle(cornerRadius: cornerRadius).strokeBorder(content, lineWidth: width))
    }
}