JavascriptCallbackMainWindow.xaml

<Window x:Class="CefSharp.Wpf.Example.JavascriptCallbackMainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:wpf="clr-namespace:CefSharp.Wpf;assembly=CefSharp.Wpf"
        Title="JavascriptCallbackMainWindow" WindowState="Maximized">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="4.5*" />
            <RowDefinition Height="4.5*" />
            <RowDefinition Height="0.5*" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <wpf:ChromiumWebBrowser Grid.Row="0"
                          x:Name="BrowserOne"
                          Address="custom://cefsharp/JavascriptCallbackTest.html"  BorderBrush="Red" BorderThickness="1"/>
        <wpf:ChromiumWebBrowser Grid.Row="1"
                          x:Name="BrowserTwo"
                          Address="test://cefsharp/JavascriptCallbackTest.html" BorderBrush="Red" BorderThickness="1"/>
        <StackPanel Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Center">
            <Button Content="Execute Callback Immediately" Click="ExecuteCallbackImmediatelyClick" Margin="0, 0, 10, 0"/>
            <Button Content="Execute Callback In 3 Seconds" Click="ExecuteCallbackInThreeSeconds"/>
        </StackPanel>
        <StatusBar Grid.Row="3">
            <ProgressBar HorizontalAlignment="Right"
                         IsIndeterminate="{Binding WebBrowser.IsLoading}"
                         Width="100"
                         Height="16"
                         Margin="3" />
            <Separator />
            <!-- TODO: Could show hover link URL here -->
            <TextBlock />
        </StatusBar>
    </Grid>
</Window>