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    <div id="header">
        <h1>Vaadin &ndash; thinking of U and I</h1>
        <div id="version">
            <strong>Version @version@</strong>
        </div>
    </div>
    <!-- /header -->

    <div id="content">
        <p>Version @version@ built on @builddate@.</p>

        <h2 id="tableofcontents">Release Notes for Vaadin Framework
            @version@</h2>
        <ul>
            <li><a href="#overview">Overview of Vaadin Framework
                    @version@ release</a></li>
            <li><a href="#changelog">Change Log for Vaadin Framework
                    @version@</a></li>
            <li><a href="#enhancements">Enhancements in Vaadin Framework
                    @version-minor@</a></li>
            <li><a href="#incompatible">Incompatible or Behavior-altering Changes in
                    @version-minor@</a></li>
            <li><a href="#knownissues">Known Issues and Limitations</a></li>
            <li><a href="#starting">Getting started with Vaadin Framework</a></li>
            <li><a href="#package">Package Contents</a></li>
            <li><a href="#migrating">Migrating from Vaadin 7.7</a></li>
            <li><a href="#dependencies">Vaadin Framework @version@
                    dependencies</a></li>
            <li><a href="#supportedversions">Supported
                    Technologies</a></li>
            <li><a href="#vaadinontheweb">Vaadin Framework on the Web</a></li>
        </ul>

        <h2 id="overview">Overview of Vaadin Framework @version@ Release</h2>

        <p>
            Vaadin Framework @version@ is a
<!--            maintenance release that includes a number of bug fixes, as listed in the <a href="#changelog">change log</a> below. -->
<!--            feature release that includes -->
                pre-release for evaluating
                a number of new features and bug fixes, as listed in the <a
                href="#enhancements">list of enhancements</a> and <a
                href="#changelog">change log</a> below.
		The API in this alpha version is not considered final and may change based on your feedback.
	</p>

        <!-- ================================================================ -->
        <h3 id="changelog">Change Log for Vaadin Framework @version@</h3>
	<!-- @release-notes-changelog@ -->
        <p>
            You can find the full list of all changes <a
                href="https://github.com/vaadin/framework/releases/tag/@version@">in
                GitHub</a>.
        </p>

        <h2 id="enhancements">Enhancements in Vaadin Framework @version-minor@</h2>

        <p>Vaadin Framework @version-minor@ includes many major and minor
            enhancements. Below is a list of the most notable changes:</p>

        <ul>
            <li>Separate row heights for header, body and footer in Grid</li>
            <li>Support for item descriptions (tooltips) in CheckBoxGroup, RadioButtonGroup and Tree</li>
            <li>Binder supports removing bindings</li>
            <li>Binding builder methods do not have to be chained</li>
            <li>Bean validation failures will revert changes in Binder</li>
            <li>Notification supports CloseListener</li>
            <li>Tree now has methods to scroll it programmatically</li>
            <li>The browser time zone can be obtained from WebBrowser if the browser supports it</li>
            <li>AbstractDateField now supports formatting of time zone information</li>
            <li>PushState based navigation support</li>
            <li>Grid WAI-ARIA support has been improved (aria-sort added)</li>
            <li>Client side ErrorLevel support</li>
            <li>VaadinService, VaadinServlet and VaadinServletService have protected no-args constructors to make DI integrations simpler</li>
        </ul>

        </p>

        <p>
            For enhancements introduced in Vaadin Framework 8.1, see the <a
                href="http://vaadin.com/download/release/8.1/8.1.0/release-notes.html">Release
                Notes for Vaadin Framework 8.1.0</a>.
            For migrating from previous framework versions, see <a href="#incompatible">the list of incompatible changes</a> and <a href="#migrating">how to migrate
            to Vaadin Framework 8</a>.
        </p>

        <h2 id="incompatible">Incompatible or Behavior-altering Changes in @version-minor@</h2>

        <li>Row height in <tt>Grid</tt> is replaced with separate header, body and footer row heights</li>
        <li><tt>GridState</tt> variable <tt>rowHeight</tt> has been replaced by three variables.</li>
        <li><tt>Button</tt> has a new constructor that may cause constructor calls with null as first parameter to be ambiguous.</li>
        <li><tt>DataCommunicator</tt> methods <tt>getDataProviderSize</tt> and <tt>fetchItemsWithRange</tt> are now <tt>public</tt>, not <tt>protected</tt>.</li>
        <li><tt>Binder</tt> method <tt>getBindings</tt> now returns a Collection, not a Set.</li>
        <li><tt>Binder</tt> protected method <tt>handleError</tt> now takes a <tt>ValidationResult</tt>, not <tt>String</tt>.</li>
        <li><tt>BindingBuilder</tt> now works like a proper builder. Adding a converter will not mark Binding as <tt>bound</tt> allowing chaining to the same object.</li>
        <li><tt>ErrorLevel</tt> is removed from <tt>ErrorMessage</tt> and now <tt>com.vaadin.shared.ui.ErrorLevel</tt> should be used.</li>
        <li>Error indicators are now <tt>&lt;span class="v-errorindicator"&gt;&lt;/span&gt;</tt> elements.</li>
        <li><tt>Embedded</tt> is not a <tt>LegacyComponent</tt> anymore.</li>
        <li><tt>Notification</tt> method <tt>show</tt> returns <tt>Notification</tt>, instead of <tt>void</tt>.</li>
        <li><tt>SharedState</tt> field <tt>registeredEventListeners</tt> is a <tt>Map</tt> instead of <tt>Set</tt>.</li>
        <li>The client side <tt>SelectionModel</tt> interface has a new method <tt>isMultiSelectionAllowed</tt>.</li>
        <li><tt>AbstractDateField</tt> is not a <tt>LegacyComponent</tt> anymore.</li>
        <li><tt>AbstractDateField</tt>.<tt>formatDate</tt> is now abstract.</li>
        <li><tt>VAbstractTextualDate</tt>.<tt>updateDateVariables()</tt> is now <tt>updateBufferedResolutions()</tt> and <tt>updateAndSendBufferedValues()</tt>.</li>
        <li>For <tt>GridDragStartEvent</tt> and <tt>GridDragEndEvent</tt> classes, the method <tt>getDraggedItems</tt> now returns a <tt>List</tt> instead of a <tt>Set</tt>, with the first-to-last item ordering from client side.</li>

        <h2>For incompatible or behavior-altering changes in 8.1, please see <a href="https://vaadin.com/download/release/8.1/8.1.0/release-notes.html#incompatible">8.1 release notes</a></h2>
        
                
        <h3 id="knownissues">Known Issues and Limitations</h3>
        <ul>
            <li>Drag'n'drop in a Table doesn't work on touch devices running
                Internet Explorer (Windows Phone, Surface)
                (<a href="https://github.com/vaadin/framework/issues/5170">#5170</a>)
            </li>
            <li>Payload based drop criteria do not work on IE11 - use criteria scripts if IE11 support of drop validation is required</li>
            <li>Specifying layout sizes using <tt>em</tt> is currently discouraged, because it results in fractional
            components sizes in many cases, which might cause unwanted 1px gaps between components.
            </li>
            <li>Up-to-date information about configuration needed for push and compatibility issues are available in
            <a href="https://vaadin.com/wiki/-/wiki/Main/Configuring+push+for+your+environment">this wiki page.</a>
            <br />
            The most prominent limitations are:
            <ul>
                <li>Push is currently not supported in portals (See <a
                    href="https://github.com/vaadin/framework/issues/3741">#3741</a>)
                </li>
                <li>Transport mode WEBSOCKET does not support invalidating the session on Tomcat 7,
                     nor setting cookies for the session. The new transport mode WEBSOCKET_XHR can be
                     used to bypass these limitations.
                     <br />
                     See tickets <a href="https://github.com/vaadin/framework/issues/3911">#3911</a> and
                     <a href="https://github.com/vaadin/framework/issues/3861">#3861</a>
                </li>
            </ul>
            </li>
            <li>The Maven GWT compilation for <tt>Vaadin7WidgetSet</tt> requires at least 1G of memory, when using the <tt>vaadin-client-compatibility</tt> package. If compiled inside Eclipse, possibly even more.</li>
        </ul>


        <h2 id="starting">Getting started with Vaadin Framework</h2>

        <p>
            <b>Vaadin Framework</b> is a Java framework for building modern web
            applications that look great, perform well and make you and
            your users happy. <b>The Framework</b> is available under the
            Apache License, Version 2.0 (see the
            <tt>license.html</tt>
            in the Vaadin Framework ZIP package).
        </p>

        <p>
            The easiest ways to start using <b>Vaadin Framework</b> are:
        </p>

        <ul>
            <li><strong>Maven dependency.</strong>If using Maven, define it as a dependency or use
                any of the available archetypes to create a new project. More information at
                <a href="https://vaadin.com/maven">https://vaadin.com/maven</a>
            </li>

            <li><strong>IDE Plugins.</strong>If using Eclipse, use the
                <a href="http://vaadin.com/eclipse">Vaadin Plugin for Eclipse</a>, which automatically
                downloads the Framework libraries. For NetBeans 8.0 and 7.4, use the
                <a href="http://plugins.netbeans.org/plugin/50531/vaadin-plug-in-for-netbeans">official Vaadin plugin</a>
                that provides Maven based wizards and code completion support for Vaadin Framework based development.
            </li>
        </ul>

        <p>
            Vaadin Framework is also available as a ZIP package downloadable from <a
                href="http://vaadin.com/download">Vaadin Download
                page</a>.
        </p>

        <h3 id="package">Package Contents</h3>

        <p>Inside the ZIP installation package you will find:</p>

        <ul>
            <li>Separate server-side (<tt>vaadin-server</tt>) and
                client-side (<tt>vaadin-client</tt>, <tt>vaadin-client-compiler</tt>)
                development libraries
            </li>
            <li>Precompiled widget set (<tt>vaadin-client-compiled</tt>)
                for server-side development
            </li>
            <li>Shared library (<tt>vaadin-shared</tt>) for both
                server- and client-side libraries
            </li>
            <li>Valo theme (the only inbuilt theme) (<tt>vaadin-themes</tt>)
            </li>
            <li>Dependency libraries provided under the <tt>lib/</tt>
                folder
            </li>
            <li>Vaadin 7 compatible classes for server-side (<tt>vaadin-compatibility-server</tt>,
                <tt>vaadin-compatibility-shared</tt>), client-side (<tt>vaadin-compatibility-client</tt>) and themes (<tt>vaadin-compatibility-themes</tt>)
            </li>
        </ul>

        <p>
            See the
            <tt>README.TXT</tt>
            in the installation package for detailed information about
            the package contents.
        </p>

        <p>
            For server-side development, copy the
            <tt>vaadin-server</tt>
            ,
            <tt>vaadin-client-compiled</tt>
            ,
            <tt>vaadin-shared</tt>
            , and
            <tt>vaadin-themes</tt>
            from the main folder and the dependencies from the
            <tt>lib</tt>
            folder to the
            <tt>WEB-INF/lib</tt>
            folder of your Vaadin project. (The
            <tt>vaadin-client-compiled</tt>
            is necessary if you do not wish to compile the widget set by
            your own, which you need to do if you use almost any add-on
            components.)
        </p>

        <h2 id="migrating">Migrating from Vaadin Framework 7.7</h2>

        <p>
            Most Vaadin Framework 7 applications need some changes when migrating
            to Vaadin Framework 8. In addition to updating dependencies, all references to
            Framework 7 style data binding and components using it need to be
            updated either to use new Framework 8 style data binding or to use the
            compatibility versions in separate packages.
        </p>

        <p>
            Vaadin Framework 7 compatible versions of the old data binding API and
            components (with the exception of Form) are available in the package
            com.vaadin.v7 in modules vaadin-compatibility-server,
            vaadin-compatibility-shared etc. that can be used instead of
            vaadin-server, vaadin-shared etc. The package
            vaadin-compatibility-client-compiled contains the widgetset
            <tt>com.vaadin.v7.Vaadin7WidgetSet</tt> which can be used instead of
            <tt>DefaultWidgetSet</tt>. Please note that the rename to com.vaadin.v7
            has only been applied to classes that are only relevant for the
            compatibility modules. Some classes have also been renamed while still
            being part of the non-compatibility modules.
        </p>
        <p>
        All applications using either <tt>Reindeer</tt>, <tt>Runo</tt>, <tt>Chameleon</tt> or <tt>Base</tt> theme must include the <tt>vaadin-compatibility-themes</tt> package.
        </p>

        <p>
            There is a <a href="https://github.com/vaadin/framework8-migration-tool/">
            migration tool</a> which helps with some of the migration steps.
        </p>

        <p>
            Some Vaadin Framework 7 add-ons do not work in version 8 - please check the add-ons in <a
                href="http://vaadin.com/directory/">Vaadin Directory</a>
            for Framework version 8 support.
        </p>

        <h3 id="upgrading">Common Upgrade Steps</h3>

        <p>Always when upgrading from an earlier Vaadin Framework version, you
            must:</p>

        <ul>
            <li>Recompile your classes using the new Framework
                version. Binary compatibility is only guaranteed for
                maintenance releases of Framework.</li>

            <li>Unless using the precompiled widget set, recompile
                your widget set using the new Framework version.</li>
        </ul>

        <p>Remember also to refresh the project in your IDE to
            ensure that the new version of everything is in use.</p>

        <p>
            By using the "
            <tt>?debug</tt>
            " URL parameter, you can verify that the version of the
            servlet, the theme, and the widget set all match.
        </p>

        <p>
            <b>Eclipse</b> users should always check if there is a new
            version of the Eclipse Plug-in available.
        </p>

        <p>
            <b>Maven</b> users should update the Vaadin Framework dependency
            version in the
            <tt>pom.xml</tt>
            .
        </p>

        <h2 id="dependencies">Vaadin Framework @version@ Dependencies</h2>

        <p>When using Maven, Ivy, Gradle, or other dependency
            management system, all Framework dependencies are downloaded
            automatically. This is also the case when using the Vaadin
            Plugin for Eclipse.</p>

        <p>
            The Vaadin Framework ZIP installation package includes the
            dependencies in the
            <tt>lib</tt>
            subfolder. These need to be copied to the
            <tt>WEB-INF/lib</tt>
            folder of the web application that uses Vaadin Framework.
        </p>

        <p>
            The dependencies are listed in the <a href="license.html">Licensing
                description</a>. Some are explicit dependencies packaged and
            distributed as separate JARs, while some are included inside
            other libraries.
        </p>

        <h3>Bean Validation</h3>

        <p>
            If you use the bean validation feature, you need
            a Bean Validation API implementation. You need to install
            the implementation JAR in the
            <tt>WEB-INF/lib</tt>
            directory of the web application that uses validation.
        </p>

        <h2 id="supportedversions">Supported Technologies</h2>

        <p>
            Vaadin Framework 8 is compatible with <b>Java 8</b> and newer. Vaadin Framework
            8 is especially supported on the following <b>operating
                systems</b>:
        </p>

        <ul>
            <li>Windows</li>
            <li>Linux</li>
            <li>Mac OS X</li>
        </ul>

        <p>
            Vaadin Framework 8 requires <b>Java Servlet API 3.0</b> but also
            supports later versions and should work with any Java
            application server that conforms to the standard. The
            following <b>application servers</b> are supported:
        </p>

        <ul id="supportedservers">
            <li>Apache Tomcat 7-8</li>
            <li>Apache TomEE 1.7 and 7.0</li>
            <li>Oracle WebLogic Server 12.2</li>
            <li>IBM WebSphere Application Server 9</li>
            <li>JBoss EAP 6</li>
            <li>Wildfly 8-11</li>
            <li>Jetty 8-9</li>
            <li>Glassfish 4</li>
            <li>Payara Server 164</li>
        </ul>

        <p>
            Vaadin Framework 8 supports the JSR-286 Portlet specification and all
            portals that implement the specification should work provided
            they support Java 8 and Servlet 3.0. The following <b>portals</b>
            are supported:
        </p>

        <ul>
            <li>Liferay Portal 6.2</li>
            <li>Liferay Portal 7.0</li>
        </ul>

        <p>
            Vaadin Framework @version@ supports the following <b>desktop browsers</b>:
        </p>

        <ul>
            <li>Mozilla Firefox (latest version, currently 54)</li>
            <li>Mozilla Firefox ESR (latest version, currently 52 ESR)</li>
            <li>Internet Explorer 11, Edge (latest version)</li>
            <li>Safari 9+</li>
            <li>Google Chrome (latest version, currently 59)</li>
        </ul>

        <p>
            Additionally, Vaadin Framework supports the built-in browsers in the
            following <b>mobile operating systems</b>:
        </p>

        <ul>
            <li>iOS 9+</li>
            <li>Android 4+ with Chrome 42+</li>
        </ul>

        <h2 id="vaadinontheweb">Vaadin on the Web</h2>

        <ul>
            <li><a href="http://vaadin.com">vaadin.com - The
                    developer portal containing everything you need to
                    know about Vaadin</a></li>
            <li><a href="http://vaadin.com/demo">vaadin.com/demo
                    - A collection of demos for Vaadin Framework</a></li>
            <li><a href="http://vaadin.com/learn">vaadin.com/learn
                    - Getting started with Vaadin Framework</a></li>
            <li><a href="http://vaadin.com/forum">vaadin.com/forum
                    - Forums for Vaadin Framework related discussions</a></li>
            <li><a href="http://vaadin.com/book">vaadin.com/book
                    - Book of Vaadin - everything you need to know about
                    Vaadin Framework</a></li>
            <li><a href="http://vaadin.com/api">vaadin.com/api
                    - Online javadocs</a></li>
            <li><a href="http://vaadin.com/directory">vaadin.com/directory
                    - Add-ons for Vaadin Framework</a></li>

            <li><a href="http://vaadin.com/pro-tools">vaadin.com/pro-tools
                    - Commercial tools for Vaadin Framework</a></li>
            <li><a href="http://vaadin.com/support">vaadin.com/support
                    - Commercial support for Vaadin Framework</a></li>
            <li><a href="http://vaadin.com/services">vaadin.com/services
                    - Expert services for Vaadin Framework users</a></li>
            <li><a href="http://vaadin.com/company">vaadin.com/company
                    - Information about the company behind Vaadin Framework</a></li>
            <li><a href="https://vaadin.com/contribute">vaadin.com/contribute - Contribution quide</a></li>
            <li><a href="https://github.com/vaadin/framework/issues">github.com/vaadin/framework - Github repository</a></li>
        </ul>

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