SwiftUI Canvas Drawing Context

import SwiftUI

struct SparklineCanvas: View {
    let values: [Double]

    var body: some View {
        Canvas { context, size in
            guard values.count > 1 else { return }

            let maxValue = values.max() ?? 1
            let points = values.enumerated().map { index, value in
                CGPoint(
                    x: size.width * CGFloat(index) / CGFloat(values.count - 1),
                    y: size.height - size.height * CGFloat(value / maxValue)
                )
            }

            var path = Path()
            path.move(to: points[0])
            points.dropFirst().forEach { path.addLine(to: $0) }

            context.stroke(path, with: .color(.teal), lineWidth: 3)
        }
        .frame(height: 96)
    }
}