DOC: release notes for 1.3.0 Styler

doc/source/whatsnew/v1.3.0.rst

@@ -110,6 +110,30 @@ both XPath 1.0 and XSLT 1.0 is available. (:issue:`27554`)
 
 For more, see :ref:`io.xml` in the user guide on IO tools.
 
+Styler Upgrades
+^^^^^^^^^^^^^^^
+
+We provided some focused development on :class:`.Styler`, including altering methods
+to accept more universal CSS language for arguments, such as ``'color:red;'`` instead of
+``[('color', 'red')]``. This is also added to the built-in methods to allow custom CSS
+highlighting instead of default background coloring.
+
+The :meth:`.Styler.apply` now consistently allows functions with ``ndarray`` output to
+allow more flexible development of UDFs when ``axis`` is ``None`` ``0`` or ``1``.
+
+:meth:`.Styler.set_tooltips` is a new method that allows adding on hover tooltips to
+enhance interactive displays. :meth:`.Styler.set_td_classes`, which was recently
+introduced in v1.2.0 to allow adding specific CSS classes to data cells, has
+been made as performant as :meth:`.Styler.apply` and :meth:`.Styler.applymap`,
+if not more performant in some
+cases. The overall performance of HTML render times has been considerably improved to
+match :meth:`DataFrame.to_html`.
+
+The :meth:`.Styler.format` has also had upgrades to easily format missing data,
+precision, and perform HTML escaping. There have been numerous other bug fixes to
+properly format HTML and eliminate some inconsistencies.
+
+
 .. _whatsnew_130.enhancements.other:
 
 Other enhancements