JavaFX 21 release (#76)

config.toml

@@ -33,7 +33,7 @@ theme = "hugo-elate-theme"
 
     # postpended links
     [[menu.postpend]]
-      url = "/highlights/20"
+      url = "/highlights/21"
       name = "Highlights"
       weight = 1
 
@@ -104,19 +104,19 @@ theme = "hugo-elate-theme"
 
     [[params.documentation.reference.item]]
       title = "API documentation"
-      url = "/javadoc/20/"
+      url = "/javadoc/21/"
 
     [[params.documentation.reference.item]]
       title = "Introduction to FXML"
-      url = "/javadoc/20/javafx.fxml/javafx/fxml/doc-files/introduction_to_fxml.html"
+      url = "/javadoc/21/javafx.fxml/javafx/fxml/doc-files/introduction_to_fxml.html"
 
     [[params.documentation.reference.item]]
       title = "JavaFX CSS Reference Guide"
-      url = "/javadoc/20/javafx.graphics/javafx/scene/doc-files/cssref.html"
+      url = "/javadoc/21/javafx.graphics/javafx/scene/doc-files/cssref.html"
 
     [[params.documentation.reference.item]]
       title = "Release Notes"
-      url = "https://github.com/openjdk/jfx/blob/jfx20/doc-files/release-notes-20.md"
+      url = "https://github.com/openjdk/jfx/blob/jfx21/doc-files/release-notes-21.md"
 
     [[params.documentation.community.item]]
       title = "FXDocs"

content/highlights/21/_index.md

@@ -0,0 +1,52 @@
+---
+title: "JavaFX 21 Highlights"
+section: "highlights"
+styleclass: "content"
+---
+# JavaFX 21 Highlights
+
+JavaFX version 21 has been released. We've tailored down some of the most exciting parts of the release in this document.
+
+### JavaFX 21 requires macOS 11 or later
+
+On Mac platforms, JavaFX 21 requires macOS 11 or later.
+An exception will be thrown when initializing the JavaFX runtime on older versions of macOS.
+
+### JavaFX 21 requires GTK 3 on Linux
+
+On Linux platforms, JavaFX 21 requires GTK3 version 3.8 or later.
+An exception will be thrown when initializing the JavaFX runtime if the GTK 3 library cannot be loaded.
+
+Exciting features:
+- New APIs:
+  - Add and remove listeners with ease using the new `Subscription` API
+  - Event handler methods `addEvent*` and `removeEvent*` have been added to `EventTarget` interface
+  - GridPane has a new constructor: `GridPane(double hgap, double vgap)`
+  - Platform class has a new method `canStartNestedEventLoop` which can used to check whether it is safe to start a nested event loop
+  - TextFlow has a new method `underlineShape(int, int)` to enable spellchecker decoration (squiggly line) under text region
+  - TableHeaderRow has a new protected method `showColumnMenu(mouseEvent)`, allowing developers to customize the behaviour when the table menu button is clicked
+- All new APIs since JavaFX 9 can now be easily accessed from the [javadoc](https://openjfx.io/javadoc/21/new-list.html) under the `New` section.
+
+Improvements:
+- Performance improvement in VirtualFlow
+- Table column's PopupMenu is now created lazily. This improves performance, especially for tables with many columns
+- ObservableListBase constructs ListChangeBuilder lazily improving performance of application using `ObservableList`
+
+The community came together to fix 63 bugs in the last 6 months. Following are major bug-fixes that went into JavaFX 21:
+
+- `Match.getPseudoClasses` used to return an instance `PseudoClassState`, which is a private class
+- Fix `NPE` for drag and drop events
+- Spinner's converter now correctly update its editor
+- JavaFX now supports fonts installed per-user on Windows 10/11
+- Memory leak fix in JPEG image loader
+
+Finally, these are some dependency upgrades in JavaFX 20:
+- Upgraded libFFI to 3.4.4
+- Upgraded WebKit to 615.1
+- Upgraded libxml2 to 2.10.4
+- Upgraded ICU4C to 73.1
+
+
+A more comprehensive list of all the changes in JavaFX 21 can be found on [Github](https://github.com/openjdk/jfx/blob/jfx21/doc-files/release-notes-21.md).
+
+Kudos go to the fine people at [Gluon](https://gluonhq.com) who took care of the bulk of the work on JavaFX 21. Do check their [JavaFX Long Term Support](https://gluonhq.com/services/javafx-support/) services.