Method isClosed

src/main/java/org/htmlunit/WebWindow.java:127–127

Indicates if this window is closed. No action should be performed on a closed window. @return true when the window is closed

()

     * @return {@code true} when the window is closed
     */
    boolean isClosed();

    /**
     * Returns the width (in pixels) of the browser window viewport including, if rendered, the vertical scrollbar.