WkWebView not loading local image files under ios9

in order to improve the performance , i update the webview to WKwebview :cordova wkwebview,unfortunately , it can’t load the local file from ‘/Documents’ directory , and i found another plugin https://www.npmjs.com/package/@telerik/cordova-plugin-wkwebview ,So is there someone used to try the plugin to fix the issue about read local files?