CODEWITHSUNDEEP
javascriptiosswift
hoi
hoi

Reputation: 2188

How to detect history.pushstate in WKWebView

I developed hybrid iOS application with Swift and want to detect history.pushstate() in WKWebView. I did override WKWebView's methods, but I couldn't detect anything.

Is there a way or trick to detect history.pushstate()

Upvotes: 6

Views: 2099

Answers (2)

iolate
iolate

Reputation: 121

You can observe WKWebView.url through key-value observing

var urlObservation: NSKeyValueObservation?

...
let webView = WKWebView(...)
urlObservation = webView.observe(\.url, changeHandler: { webView, change in
    print("url changed")
})

It seems that Firefox for iOS is also using this way.

Upvotes: 3

gyre
gyre

Reputation: 16777

This is certainly a workaround, but if you are allowed to edit properties of built-in objects (like in most browsers) you can wrap both functions and use an intercepting handler to track when they are called:

function track (fn, handler) {
  return function interceptor () {
    handler.apply(this, arguments)
    return fn.apply(this, arguments)
  }
}

history.pushState = track(history.pushState, function (state, title, url) {
  // do something with `state, `title`, and `url`
  console.log('pushState called with:', { state: state, title: title, url: url })
})


history.replaceState = track(history.replaceState, function (state, title, url) {
  // do something with `state, `title`, and `url`
  console.log('replaceState called with:', { state: state, title: title, url: url })
})

history.pushState(null, 'Title 1', '/example-page')

Upvotes: 3

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