My Swift Code:
self.webView.evaluateJavaScript("javascript: localStorage.setItem('usr_dtls', 'vivek')") { (result, error) -> Void in
print(result)
print(error)
}
Error message in cosole:
nil
Optional(Error Domain=WKErrorDomain Code=4 "A JavaScript exception occurred" UserInfo={WKJavaScriptExceptionLineNumber=1, WKJavaScriptExceptionMessage=SecurityError (DOM Exception 18): The operation is insecure., WKJavaScriptExceptionColumnNumber=25, WKJavaScriptExceptionSourceURL=about:blank, NSLocalizedDescription=A JavaScript exception occurred})
Any idea what's wrong?
My Swift Code:
self.webView.evaluateJavaScript("javascript: localStorage.setItem('usr_dtls', 'vivek')") { (result, error) -> Void in
print(result)
print(error)
}
Error message in cosole:
nil
Optional(Error Domain=WKErrorDomain Code=4 "A JavaScript exception occurred" UserInfo={WKJavaScriptExceptionLineNumber=1, WKJavaScriptExceptionMessage=SecurityError (DOM Exception 18): The operation is insecure., WKJavaScriptExceptionColumnNumber=25, WKJavaScriptExceptionSourceURL=about:blank, NSLocalizedDescription=A JavaScript exception occurred})
Any idea what's wrong?
Share Improve this question edited Dec 15, 2017 at 12:18 technerd 14.5k11 gold badges65 silver badges92 bronze badges asked Dec 15, 2017 at 12:18 Vivek KumarVivek Kumar 4065 silver badges15 bronze badges 2-
Try removing the
javascript:. – paulvs Commented Dec 15, 2017 at 12:30 - Still the same error message in console: Error Domain=WKErrorDomain Code=4 "A JavaScript exception occurred" UserInfo={WKJavaScriptExceptionLineNumber=1, WKJavaScriptExceptionMessage=SecurityError (DOM Exception 18): The operation is insecure., WKJavaScriptExceptionColumnNumber=13, WKJavaScriptExceptionSourceURL=about:blank, NSLocalizedDescription=A JavaScript exception occurred} – Vivek Kumar Commented Dec 18, 2017 at 5:10
2 Answers
Reset to default 6//Found a solution.Execute Javascript after webView finished loading
//Sample code:
self.webView.navigationDelegate = self
func webView(_ webView: WKWebView,
didFinish navigation: WKNavigation!)
{
self.webView.evaluateJavaScript("localStorage.setItem('usr_dtls', 'vivek')") { (result, error) -> Void in
print("Finished navigation and Local storage injection.")
}
}
//Run the app and debug using Safari Technology Preview
//You will see the injected data as Show in the image below:
[![Screenshot][1]][1]
[1]: https://i.sstatic/tzGUc.png
Since evaluateJavaScript executes code as if from the Console of Safari Inspector, the javascript: is not used.
On a side note, the javascript: prefix is used to execute JavaScript from a URL (you can test this by typing (not copy-pasting) javascript: alert('howdy') into the address bar of your browser).