When using localStorage anyway, getting "DOM Exception 18":

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:351)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:304)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:491)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:754)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:868)
at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:55)
at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:157)
at java.lang.Thread.run(Thread.java:724)
Caused by: netscape.javascript.JSException: Error: SecurityError: DOM Exception 18
at com.sun.webkit.dom.JSObject.fwkMakeException(JSObject.java:128)
at com.sun.webkit.WebPage.twkExecuteScript(Native Method)
at com.sun.webkit.WebPage.executeScript(WebPage.java:1410)
at javafx.scene.web.WebEngine.executeScript(WebEngine.java:934)
at localstoragefailsexample.LocalStorageFailsExample.start(LocalStorageFailsExample.java:28)
at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:811)
at com.sun.javafx.application.PlatformImpl$7.run(PlatformImpl.java:331)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:297)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:294)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$6.run(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at com.sun.glass.ui.gtk.GtkApplication.access$200(GtkApplication.java:47)
at com.sun.glass.ui.gtk.GtkApplication$5$1.run(GtkApplication.java:137)
... 1 more
Exception running application localstoragefailsexample.LocalStorageFailsExample


By the way, if I mention user data directory (engine.setUserDataDirectory(new File("/local/.smth"));), it makes dir within it (localstorage) and throws the same exception.

see attached simple project