Simple view model for extracting `og:meta` tags from a web page with Swift and WKWebView (without displaying the web view).

Decodable.swift

struct WebImageMetaData: Decodable {
    let title: String?
    let summary: String?
    let url: URL?
    let image: URL?
    let mimetype: String?
    let width: String?
    let height: String?
    
    private enum CodingKeys: String, CodingKey {
        case title = "og:title"
        case summary = "og:description"
        case url = "og:url"
        case image = "og:image"
        case mimetype = "og:image:type"
        case width = "og:image:width"
        case height = "og:image:height"
    }
}

ScraperView.swift

// usage.
import SwiftUI

struct ScraperView: View {
    @StateObject var modelView = WKWebViewScraper()

    var body: some View {
        if clipboard.content != nil {
            Text(modelView.html)
        }
    }
}

WKWebViewScraper.swift

import SwiftUI
import WebKit


class WKWebViewScraper: NSObject, ObservableObject, WKNavigationDelegate {
    @Published var html: String = ""
    
    var webView: WKWebView
    
    private let js: String = """
        JSON.stringify(Array.from(document.getElementsByTagName('meta'))
        .filter(el => [
          "og:image:type",
          "og:title",
          "og:description",
          "og:url",
          "og:image",
          "og:image:type",
          "og:image:width",
          "og:image:height"
        ].includes(el.getAttribute("property")))
        .reduce((result, el) => {
          let prop = el.getAttribute("property")
          let content = el.getAttribute("content")
          if (prop && content) {
            result[prop] = content
          }
          return result
        }, {}))
    """
    
    override init() {
        self.webView = WKWebView()
        super.init()
    }
    
    func load(_ url: URL?) -> Void {
        let request = URLRequest(url: url!)
        
        webView.navigationDelegate = self
        webView.load(request)
    }
    
    // MARK: - add other navigation delegate methods here if you like.
    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        print("Webview finished loading.")
        webView.evaluateJavaScript(self.js, completionHandler: {result, error in
            if let html = result as? String {
                self.html = html
            }
        })
    }

    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
        // handle errors...
        print("Webview failed with error: \(error.localizedDescription)")
    }
    
}