Detect when `history.back()` has b… | Apple Developer Forums

Detect when `history.back()` has been called

We have a PWA that has a button that calls `history.back()`. If I'm already at the root URL `history.back()` doesn't do anything in `WKWebView`, but I also don't get notified either by any of the `WKNavigationDelegate` callbacks.

So is there a way to get notified if a website has called `history.back()`?

STEPS TO REPRODUCE

Initialize `WKWebView` and open my sample URL: https://martindinh.de/apple.html and click the "Go back" button. WKWebView will just stay on the same page without notifying the webview.

This is a simple Playground setup:

 //: A UIKit based Playground for presenting user interface
 
import UIKit
import PlaygroundSupport
import WebKit
 
class MyViewController : UIViewController {
let webview: WKWebView = .init()
 
override func loadView() {
let view = UIView()
view.backgroundColor = .white
 
webview.frame = CGRect(origin: .zero, size: CGSize(width: 300, height: 500))
webview.load(URLRequest(url: URL(string: "https://martindinh.de/apple.html")!))
view.addSubview(webview)
self.view = view
}
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()

	//: A UIKit based Playground for presenting user interface

	import UIKit
	import PlaygroundSupport
	import WebKit

	class MyViewController : UIViewController {
	let webview: WKWebView = .init()

	override func loadView() {
	let view = UIView()
	view.backgroundColor = .white

	webview.frame = CGRect(origin: .zero, size: CGSize(width: 300, height: 500))
	webview.load(URLRequest(url: URL(string: "https://martindinh.de/apple.html")!))
	view.addSubview(webview)
	self.view = view
	}
	}
	// Present the view controller in the Live View window
	PlaygroundPage.current.liveView = MyViewController()