Is there a way to transfer a user's LocalStorage data to the wkwebview browser when adding the cordova-plugin-wkwebview-engine plugin into an existing cordova/ionic project?
WKWebView is essentially a different browser and has no knowledge of any previous data saved within the UIWebView browser.
Crosswalk for Android handles this process automatically by migrating data to the new browser when the plugin is installed and first run on an existing user's device.