Image from URL in Swift

fetch-image.swift

func fetchImage(from urlString: String, completionHandler: @escaping (_ data: Data?) -> ()) {
	let session = URLSession.shared
    let url = URL(string: image_url)
        
    let dataTask = session.dataTask(with: url!) { (data, response, error) in
        if error != nil {
            print("Error fetching the image! 😢")
            completionHandler(nil)
        } else {
            completionHandler(data)
        }
    }
        
    dataTask.resume()
}