Platform: ignore Sdl2Application title in Emscripten.

src/Platform/Sdl2Application.cpp

@@ -251,7 +251,12 @@ void Sdl2Application::mousePressEvent(MouseEvent&) {}
 void Sdl2Application::mouseReleaseEvent(MouseEvent&) {}
 void Sdl2Application::mouseMoveEvent(MouseMoveEvent&) {}
 
-Sdl2Application::Configuration::Configuration(): _title("Magnum SDL2 Application"), _size(800, 600), _flags(Flag::Resizable), _sampleCount(0) {}
+Sdl2Application::Configuration::Configuration():
+    #ifndef CORRADE_TARGET_EMSCRIPTEN
+    _title("Magnum SDL2 Application"),
+    #endif
+    _size(800, 600), _flags(Flag::Resizable), _sampleCount(0) {}
+
 Sdl2Application::Configuration::~Configuration() = default;
 
 Sdl2Application::InputEvent::Modifiers Sdl2Application::MouseEvent::modifiers() {

src/Platform/Sdl2Application.h

@@ -393,19 +393,32 @@ class Sdl2Application::Configuration {
         /*implicit*/ Configuration();
         ~Configuration();
 
-        /** @brief Window title */
+        #ifndef CORRADE_TARGET_EMSCRIPTEN
+        /**
+         * @brief Window title
+         *
+         * @note Not available in @ref CORRADE_TARGET_EMSCRIPTEN.
+         */
         std::string title() const { return _title; }
+        #endif
 
         /**
          * @brief Set window title
          * @return Reference to self (for method chaining)
          *
          * Default is `"Magnum SDL2 Application"`.
+         * @note In @ref CORRADE_TARGET_EMSCRIPTEN "Emscripten" this function
+         *      does nothing and is included only for compatibility. You need
+         *      to set the title separately in application's HTML markup.
          */
+        #ifndef CORRADE_TARGET_EMSCRIPTEN
         Configuration& setTitle(std::string title) {
             _title = std::move(title);
             return *this;
         }
+        #else
+        template<class T> Configuration& setTitle(const T&) { return *this; }
+        #endif
 
         /** @brief Window size */
         Vector2i size() const { return _size; }
@@ -451,7 +464,9 @@ class Sdl2Application::Configuration {
         }
 
     private:
+        #ifndef CORRADE_TARGET_EMSCRIPTEN
         std::string _title;
+        #endif
         Vector2i _size;
         Flags _flags;
         Int _sampleCount;