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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<style>
dt { font-weight: bold; }
h3 { text-decoration: underline; }
dd { margin-top: 10px; margin-bottom: 10px; }
dd p { margin-top: 0; }
dd div { margin: 10px 0; }
</style>
<title>Wt Release notes</title>
</head>
<body>
<h1>Wt Release notes</h1>
This file lists important notes on migrating existing applications to
newer version of Wt. It lists changes in the library that may break
the way you build Wt, the way you configure Wt or the Wt API and
behaviour.
<h2>Release 4.15.0 (October 28, 2026)</h2>
<dl class="section note">
<dt>Vulnerability</dt>
<dd>
Fixed the possibility to skip MFA when logging in via the register popup of the
<a href="classWt_1_1Auth_1_1AuthWidget.html" target="_blank">Auth::AuthWidget</a> when registration is enabled (this is not the default). See
<a href="https://redmine.emweb.be/issues/14874" target="_blank">Issue #14874</a> for more details.
<br/>
We recommend anyone relying on MFA in wt-auth to upgrade live deployments of his application to the latest version, or to disable
registration via the
<a href="classWt_1_1Auth_1_1AuthWidget.html#a155794d70cfd4c07c44b0efdd7dec341" target="_blank">Auth::AuthWidget::setRegistrationEnabled()</a>.
<br/>
Another option is to override the registration model in the
<a href="classWt_1_1Auth_1_1AuthWidget.html" target="_blank">Auth::AuthWidget</a> and
<a href="classWt_1_1Auth_1_1RegistrationModel.html" target="_blank">Auth::RegistrationModel</a> to ensure MFA cannot be bypassed.
For instance, this can be done by ensuring that
<a href="classWt_1_1Auth_1_1AuthWidget.html#a3d690103201896f47d8e7467c64fb2ae" target="_blank">Auth::AuthWidget::createRegistrationModel()</a> returns a
<a href="classWt_1_1Auth_1_1RegistrationModel.html" target="_blank">Auth::RegistrationModel</a> for which
<a href="classWt_1_1Auth_1_1RegistrationModel.html#a3840e1ef7a4d67104a27e1c722d45b0c" target="_blank">Auth::RegistrationModel::confirmIsExistingUser()</a>
never returns
<a href="namespaceWt_1_1Auth.html#a3e8db9f7b1ee55b3af10e8205c4dbf7d" target="_blank">Auth::IdentityConfirmationMethod::ConfirmWithPassword</a>.
</dd>
</dl>
<p>Notable changes:</p>
<ul>
<li>
A new tutorial as well as an example on how to use external JavaScript libraries in Wt is now available.
You can find the tutorial <a href="../../tutorial/extjs.html" target="_blank">here</a>, and the example can be found in the
<code>examples/d3-selection</code> file.
</li>
<li>
A new simple example demonstrating how to use
<a href="classWt_1_1Form_1_1Dbo_1_1FormModel.html" target="_blank">Form::Dbo::FormModel</a>
and
<a href="classWt_1_1Form_1_1Dbo_1_1FormView.html" target="_blank">Form::Dbo::FormView</a>
with the default delegates to validate and save a
new object was added in <code>examples/dbo-form/simple</code>.
</li>
<li>
<strong>BREAKING:</strong> Windows binary builds now require Windows 7 or later. It is however still possible to build Wt
on older versions of Windows by building from source.
</li>
</ul>
<p>Wt 4.15.0 is a major release that introduces the following new features:</p>
<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/8759" target="_blank">Issue #8759</a>:
added
<a href="classWt_1_1WDateTimeEdit.html" target="_blank">WDateTimeEdit</a>.
This combines functionality used by <a href="classWt_1_1WDateEdit.html" target="_blank">WDateEdit</a> and <a href="classWt_1_1WTimeEdit.html" target="_blank">WTimeEdit</a>.
The native HTML5 input type for this widget is also supported, this being <code><input type="datetime-local"></code>.
You can enable it by setting <a href="classWt_1_1WDateTimeEdit.html#ab097f92c3594480d85318dad97fd1709" target="_blank">WDateTimeEdit::setNativeControl(true)</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14582" target="_blank">Issue #14582</a>:
added a way to reveal the password of a
<a href="classWt_1_1WPasswordEdit.html" target="_blank">WPasswordEdit</a>. The text can be shown or hidden with
<a href="classWt_1_1WPasswordEdit.html#a93629460f8be486561a614316c37d87c" target="_blank">WPasswordEdit::setTextVisible()</a>, and
<a href="classWt_1_1WPasswordEdit.html#ad8e97bd46650b63ab339ae6f870807ef" target="_blank">WPasswordEdit::setRevealButtonEnabled()</a> adds an optional
button inside the field that lets the user toggle the visibility.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14162" target="_blank">Issue #14162</a>:
added support for the CSS content sizing keywords <code>fit-content</code>,
<code>max-content</code> and <code>min-content</code> to
<a href="classWt_1_1WLength.html" target="_blank">WLength</a>. They are
available as
<a href="namespaceWt.html#a736803866293d189d852d2c7adb7d94e" target="_blank">LengthUnit</a>
values and can be parsed from a CSS string by the
<a href="classWt_1_1WLength.html#a1f63978dbfaa8745e7ec85042fd93ce8" target="_blank">WLength string constructor</a>.
A <a href="classWt_1_1WLength.html" target="_blank">WLength</a> can also be constructed directly from such a keyword unit.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14163" target="_blank">Issue #14163</a>:
<a href="classWt_1_1WBoxLayout.html" target="_blank">WBoxLayout</a>
(<a href="classWt_1_1WHBoxLayout.html" target="_blank">WHBoxLayout</a> and
<a href="classWt_1_1WVBoxLayout.html" target="_blank">WVBoxLayout</a>) now supports
resize handles through
<a href="classWt_1_1WBoxLayout.html#ac2628c9ddfb9b6c079a8b5d5261b94c2" target="_blank">setResizable()</a> when using the
<a href="namespaceWt.html#aeb0e4f49ce4a28d8ce9b0c6005027876" target="_blank">LayoutImplementation::Flex</a>
implementation. Previously enabling a resize handle forced the layout to fall back to the
<a href="namespaceWt.html#aeb0e4f49ce4a28d8ce9b0c6005027876" target="_blank">LayoutImplementation::JavaScript</a>
implementation.
</li>
<li>
<a href="https://redmine.emweb.be/issues/7598" target="_blank">Issue #7598</a>:
When using Wt with an http server, private
<a href="classWt_1_1WResource.html" target="_blank">WResource</a>'s url will not have the
session id embedded anymore. Instead, a weak session id that can only be used to fetch
resources will be embedded. This adds another layer of protection in case the url of a
private resource is leaked.
You can disable this feature by setting the <code>use-weak-session-id</code> configuration
option to <code>false</code>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/11049" target="_blank">Issue #11049</a>:
added the
<a href="classWt_1_1SessionConstantId.html" target="_blank">SessionConstantId</a>, which is a session identifier that is unique to each
session, and that does never change. This session constant identifier can be obtained using
<a href="classWt_1_1WApplication.html#a5da537fe3008cee2d3c496fcec42c742" target="_blank">WApplication::sessionConstantId()</a>, and can be
given as parameter to
<a href="classWt_1_1WServer.html#ade44949c1c80a4e748f67e255496b29a" target="_blank">WServer::post()</a> or
<a href="classWt_1_1WServer.html#a99e63c1ade230d9f8f53c5c10ba45af1" target="_blank">WServer::schedule()</a>,
in place of the normal session identifier (obtained using
<a href="classWt_1_1WApplication.html#a314a5461dc410f4713ab1b1258fd8ced" target="_blank">WApplication::sessionId()</a>).
This allows to use those function without having to worry about the session changing id in another thread.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9745" target="_blank">Issue #9745</a>:
added the possibility to limit the size of
<a href="classWt_1_1Dbo_1_1SqlConnection.html" target="_blank">Dbo::SqlConnection</a>'s statement cache using
<a href="classWt_1_1Dbo_1_1SqlConnection.html#af59dd2d5874b658eb7d919fa88088085" target="_blank">setMaxSavedStatement()</a>.
In case the statement cache is full, statement that were not used for the longest time are removed.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14727" target="_blank">Issue #14727</a>:
added <a href="classWt_1_1RtlSide.html" target="_blank">RtlSide</a> constants
for using side names from the right-to-left perspective. Those constants are only aliases and therefore work
directly with existing
<a href="namespaceWt.html#a5a6f4636bcc6ab3c075165d249b3a5a3" target="_blank">Side</a> and <a href="classWt_1_1WFlags.html" target="_blank">WFlags<Side></a>.
</li>
</ul>
<p>Wt 4.15.0 also fixes the following bugs:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14862" target="_blank">Issue #14862</a>:
Fixed
<a href="classWt_1_1WLeafletMap.html" target="_blank">WLeafletMap</a>
not always showing the map correctly when inside a
<a href="classWt_1_1WStackedWidget.html" target="_blank">WStackedWidget</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14701" target="_blank">Issue #14701</a>:
fixed
<a href="classWt_1_1WTextEdit.html" target="_blank">WTextEdit</a> not emitting
inherited focus, keyboard, mouse, touch, and input signals when interacting
with the editor.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14606" target="_blank">Issue #14606</a>:
fixed
<a href="classWt_1_1WMenuItem.html#a26dd38b32a52ec57a0d0ffaf82291825" target="_blank">WMenuItem::setContents()</a>
changing the selected index of the
<a href="classWt_1_1WMenu.html" target="_blank">WMenu</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14758" target="_blank">Issue #14758</a>:
fixed a JavaScript exception when using the keyboard in a
<a href="classWt_1_1WPopupMenu.html" target="_blank">WPopupMenu</a>
with the Bootstrap 5 theme, including pressing Escape in submenus.
Popup menus now use the <code>Wt-dropdown-menu</code> CSS class to keep
Wt keyboard handling independent of native Bootstrap dropdowns.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14703" target="_blank">Issue #14703</a>:
fixed
<a href="classWt_1_1WLink.html" target="_blank">WLink</a> objects retaining
URLs with the old session ID for
private <a href="classWt_1_1WResource.html" target="_blank">WResource</a>
instances after calling
<a href="classWt_1_1WApplication.html#a4b0bc73bab1132f17c13f5e731068446" target="_blank">WApplication::changeSessionId()</a>.
Existing widgets using these links now refresh their resource URLs.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14594" target="_blank">Issue #14594</a>:
changing a
<a href="classWt_1_1WTableView.html" target="_blank">WTableView</a> column's
alignment with
<a href="classWt_1_1WAbstractItemView.html#aafd2a6edd366b620c71d9b3a89ed6590" target="_blank">WAbstractItemView::setColumnAlignment()</a>
after the initial render now updates the displayed cells immediately.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14772" target="_blank">Issue #14772</a>:
fixed dynamically added CSS rules sometimes being written into another
style element in the document instead of Wt's own inline style sheet,
potentially preventing the application from rendering.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14730" target="_blank">Issue #14730</a>:
fixed
<a href="classWt_1_1WDialog.html" target="_blank">WDialog</a> focus selection
skipping footer buttons and failing to provide a focus fallback. When no
other visible, enabled descendant accepts focus, the dialog now focuses
its close icon, which supports keyboard activation, or the dialog itself
if no close icon is available.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14009" target="_blank">Issue #14009</a>:
ensured that the
<a href="classWt_1_1Http_1_1Client.html" target="_blank">Http::Client</a> with
<a href="classWt_1_1Http_1_1Client.html#a34bc95c42292f3fd7d6e54f86b3781b6" target="_blank">Http::Client::followRedirect()</a>
set to true does follow redirects automatically in case of a truncation error, as long as all the headers are received and the
redirect was done over HTTPS.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14815" target="_blank">Issue #14815</a>:
fixed the configuration parsing looking for the <code>original-ip-header</code> element outside of the <code>trusted-proxy-config</code> block
instead of within it.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14816" target="_blank">Issue #14816</a>:
fixed segfault that could happen when parsing a configuration file containing a <code>trusted-proxy-config</code> block
that was missing the <code>trusted-proxies</code> element.
</li>
</ul>
<p>Wt 4.15.0 also comes with the following improvements:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14171" target="_blank">Issue #14171</a>:
<a href="classWt_1_1WServer.html" target="_blank">WServer</a> now caches parsed message resources files from
<a href="classWt_1_1WMessageResourceBundle.html" target="_blank">WMessageResourceBundle</a> to avoid
reloading and reparsing unchanged message resource files every time a new session is created, greatly
improving performances. The cached version of a file is invalidated if the given file changed, or if it was removed,
so the cache remains consistent with the actual files.
</li>
<li>
<a href="https://redmine.emweb.be/issues/7417" target="_blank">Issue #7417</a>:
HTML canvas rendering in
<a href="classWt_1_1WPaintedWidget.html" target="_blank">WPaintedWidget</a>
now takes the browser's device pixel ratio into account. This makes painted
widgets, including charts, render more sharply on high-DPI displays.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14822" target="_blank">Issue #14822</a>:
Stop keeping track of focus changes on the server side by default as this was, most of the time,
unnecessary and did require additional client-server communication.
This can be re-enabled if needed with
<a href="classWt_1_1WApplication.html#ac0332f9482f4f3099eaddbc7af881ded" target="_blank">WApplication::setTrackFocus()</a>, which
also enables the use of the new
<a href="classWt_1_1WApplication.html#afd0127b3eba8d2b48b2618dcfb586804" target="_blank">WApplication::elementFocused()</a> and
<a href="classWt_1_1WApplication.html#a09023da626a52686c2ac80db7950a4b9" target="_blank">WApplication::elementBlurred()</a> signals.
Those 2 new signals are emitted when an element receives or loses focus on the client side, respectively.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14729" target="_blank">Issue #14729</a>:
moved the handling of the focus change when hiding or removing popups to the client side.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14709" target="_blank">Issue #14709</a>:
Wt now uses the browser's Beacon API to deliver the unload signal more
reliably when a page or tab is closed, and falls back to the previous
mechanism when the Beacon API is unavailable.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14697" target="_blank">Issue #14697</a>:
reduced the impact of deadlocks by preventing session expiration from
blocking indefinitely when an expired session's lock remains held.
</li>
<li>
<a href="https://redmine.emweb.be/issues/13294" target="_blank">Issue #13294</a>:
added optional parameters to
<a href="classWt_1_1WServer.html#a34d6049137075b3c8df89cc595d1c1aa" target="_blank">WServer::httpPort()</a>
which allows to specify if it should return the HTTP or HTTPS port.
</li>
<li>
<a href="https://redmine.emweb.be/issues/13338" target="_blank">Issue #13338</a>:
<a href="classWt_1_1Core_1_1observable.html#aaae8420328720c8b37c31613dda586ad" target="_blank">observable::bindSafe()</a>
can now be considered thread safe as long as the observable is protected
against deletion.
</li>
<li>
<a href="https://redmine.emweb.be/issues/12496" target="_blank">Issue #12496</a>:
made <code>Wt::FileUtils::getTempDir()</code> and <code>Wt::FileUtils::createTempFileName()</code> weak symbols on
non-Windows platforms when compiled with a GNU-compatible compiler like GCC or Clang, allowing applications to
replace them at link time with their own implementations, for example to control where temporary files are created
or how their names are generated.
</li>
</ul>
<h2>Release 4.14.4 (October 1, 2026)</h2>
<p>Wt 4.14.4 is a patch release that addresses the following issue:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14635" target="_blank">Issue #14635</a>
fixed
<a href="classWt_1_1WFormWidget.html#a5216ba1594b5dc525cc47cad593c7ba8" target="_blank">WFormWidget::changed()</a> signal sometimes being emitted
a second time with incorrect informations when the form-data caching was enabled.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14824" target="_blank">Issue #14824</a>:
fixed
<a href="classWt_1_1WWidget.html#ab4e595dd2fd53ec3648409e44b58ce32" target="_blank">WWidget::anchorAt()</a>
(and therefore
<a href="classWt_1_1WPopupMenu.html" target="_blank">WPopupMenu</a>) sometimes not correctly aligning the widget with its
position anchor.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14619" target="_blank">Issue #14619</a>:
fixed resizable layouts not filling their available height when revealed as
deferred <a href="classWt_1_1WStackedWidget.html" target="_blank">WStackedWidget</a>
content or as a lazily loaded
<a href="classWt_1_1WTabWidget.html" target="_blank">WTabWidget</a> tab.
</li>
</ul>
<h2>Release 4.14.3 (September 8, 2026)</h2>
<p>Wt 4.14.3 is a patch release that addresses the following issue:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14789" target="_blank">Issue #14789</a>:
fixed
<a href="classWt_1_1WLineEdit.html#addb99c6ab5483836adf44a2706a410af" target="_blank">WLineEdit::setText()</a>
causing a JavaScript error when called after
<a href="classWt_1_1WLineEdit.html#a0639ec7e420ba32ffb148303a79fb969" target="_blank">WLineEdit::setInputMask()</a>
if the widget was already rendered.
</li>
</ul>
<h2>Release 4.14.2 (August 27, 2026)</h2>
<p>Wt 4.14.2 is a patch release that addresses the following issues:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14614" target="_blank">Issue #14614</a>:
fixed
<a href="classWt_1_1WWidget.html#af0df90fe8bbcb42dd057f8c1f1835b49" target="_blank">WWidget::positionAt()</a>
sometimes not correctly positioning the widget, especially when the widget it was positioned at
was inside of another popup.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14716" target="_blank">Issue #14716</a>:
fixed
<a href="classWt_1_1WPopupMenu.html" target="_blank">WPopupMenu</a>
being incorrectly positioned relative to a widget after previously being
popped up at a point.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14767" target="_blank">Issue #14767</a>:
fixed
<a href="classWt_1_1WPopupMenu.html#a9da2dff4c6de6845a5a15b1a7c22572c" target="_blank">WPopupMenu::popup(WPoint)</a> (and therefore
<a href="classWt_1_1WPopupMenu.html#a8b63c8824aa820d8d3669e563b6f57f4" target="_blank">WPopupMenu::popup(WMouseEvent)</a>)
not changing the position of the
<a href="classWt_1_1WPopupMenu.html" target="_blank">WPopupMenu</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14475" target="_blank">Issue #14475</a>:
fixed
<a href="classWt_1_1WDialog.html" target="_blank">WDialog</a> sometimes moving for no reason, or teleporting
to the wrong position when being moved by the user.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14712" target="_blank">Issue #14712</a>:
fixed
<a href="classWt_1_1WDialog.html#ac092840d5ce4ac38198a15a8ddda5e87" target="_blank">WDialog::moved()</a> signal
sometimes being emitted with an incorrect x coordinate when being moved by something else than the user.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14660" target="_blank">Issue #14660</a>:
fixed
<a href="classWt_1_1Dbo_1_1FixedSqlConnectionPool.html" target="_blank">Wt::Dbo::FixedSqlConnectionPool</a> not always correctly
waking up threads waiting for a connection when a connection was returned to the pool. This could lead to a deadlock.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14744" target="_blank">Issue #14744</a>:
fixed JavaScript error sometimes happening when resizing or adding a
<a href="classWt_1_1WTreeView.html" target="_blank">WTreeView</a> after another one had
been removed.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14714" target="_blank">Issue #14714</a>:
fixed
<a href="classWt_1_1WTextEdit.html" target="_blank">WTextEdit</a> not being
resizable below the TinyMCE default height of 400px, for example when placed
in a layout using
<a href="namespaceWt.html#aeb0e4f49ce4a28d8ce9b0c6005027876" target="_blank">LayoutImplementation::JavaScript</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14713" target="_blank">Issue #14713</a>:
fixed
<a href="classWt_1_1WTextEdit.html" target="_blank">WTextEdit</a> ignoring its offset
and always rendering in the top-left corner when positioned.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14690" target="_blank">Issue #14690</a>:
fixed
<a href="classWt_1_1WTextEdit.html" target="_blank">WTextEdit</a> not filling the
available width and height when in a layout using
<a href="namespaceWt.html#aeb0e4f49ce4a28d8ce9b0c6005027876" target="_blank">LayoutImplementation::Flex</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14437" target="_blank">Issue #14437</a>:
fixed layouts with
<a href="namespaceWt.html#aeb0e4f49ce4a28d8ce9b0c6005027876" target="_blank">LayoutImplementation::Flex</a>
not correctly removing some wrappers when removing a widget from itself.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14597" target="_blank">Issue #14597</a>:
fixed endless page reloads when using session id prefixes with <code>Combined</code> session
tracking method.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14596" target="_blank">Issue #14596</a>:
fixed incorrect handling, on the client side, of url parameters containing <code>=</code> as part of their value.
</li>
</ul>
<h2>Release 4.14.1 (August 6, 2026)</h2>
<p>Wt 4.14.1 is a patch release that addresses the following issues:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14672" target="_blank">Issue #14672</a>:
fixed web-socket not working when compression was enabled due to all of their messages being fully compressed.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14676" target="_blank">Issue #14676</a>:
fixed
<a href="classWt_1_1Auth_1_1Mfa_1_1TotpProcess.html" target="_blank">Auth::Mfa::TotpProcess</a> considering a user
trying to login while being throttled as a failed attempt, which would increase the throttle time.
Additionally, fixed the throttle time shown to the user when trying to enter the TOTP code being smaller than it actually is.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14677" target="_blank">Issue #14677</a>:
fixed
<a href="classWt_1_1WMenu.html" target="_blank">WMenu</a> selection sometimes not propagating their selection
correctly to the top-most menu.
</li>
<li>
<a href="https://redmine.emweb.be/issues/13654" target="_blank">Issue #13654</a>:
fixed a JavaScript error when adding a submenu to a
<a href="classWt_1_1WMenu.html" target="_blank">WMenu</a> that had been
removed from the page by a
<a href="classWt_1_1WTemplate.html" target="_blank">WTemplate</a> condition.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14691" target="_blank">Issue #14691</a>:
fixed
<a href="classWt_1_1WTextEdit.html" target="_blank">WTextEdit</a> not correctly
handling margins, especially when in a layout with
<a href="namespaceWt.html#aeb0e4f49ce4a28d8ce9b0c6005027876" target="_blank">LayoutImplementation::JavaScript</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14685" target="_blank">Issue #14685</a>:
fixed
<a href="classWt_1_1WTextEdit.html" target="_blank">WTextEdit</a> ignoring the offsets.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14663" target="_blank">Issue #14663</a>:
Fixed
<a href="classWt_1_1WDate.html" target="_blank">WDate</a> incorrectly handling negative years.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14667" target="_blank">Issue #14667</a>:
fixed a use-after-free that could happen at the destruction of a session.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14704" target="_blank">Issue #14704</a>:
fixed suspicious get requests not being treated as bot requests by some features,
when it should.
</li>
<li>
<a href="https://redmine.emweb.be/issues/13872" target="_blank">Issue #13872</a>:
fixed
<a href="classWt_1_1WCompositeWidget.html" target="_blank">WCompositeWidget</a> not applying the theme
style classes (such as those of a
<a href="classWt_1_1WPanel.html" target="_blank">WPanel</a>) of its implementation widget.
As part of this fix, the protected helper
<a href="classWt_1_1WTheme.html#adad836a7aad091a9b3fcc650b8a48f39" target="_blank">WTheme::resolveImplementation()</a> was
added, which custom themes can use to resolve the implementation widget of a
<a href="classWt_1_1WCompositeWidget.html" target="_blank">WCompositeWidget</a>.
</li>
</ul>
<h2>Release 4.14.0 (July 15, 2026)</h2>
<p>Notable changes:</p>
<ul>
<li>
Wt stops supporting being build with C++14. The minimum required C++ standard to build Wt is now C++17.
</li>
<li>
A new tutorial on how localization works in Wt is now available <a href="../../tutorial/localization.html" target="_blank">here</a>.
</li>
</ul>
<p>Wt 4.14.0 is a major release that introduces the following new features:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/13788" target="_blank">Issue #13788</a>:
added color mode support to
<a href="classWt_1_1WTheme.html" target="_blank">WTheme</a>. This is mainly relevant for
<a href="classWt_1_1WBootstrap5Theme.html" target="_blank">WBootstrap5Theme</a>, which introduced this concept to support
dark and light mode.
The color mode can be changed using
<a href="classWt_1_1WTheme.html#a4e17e64908c4882d9263b808210b25b2" target="_blank">WTheme::setColorMode()</a>. Note that you will have
to override this function if you want other themes than
<a href="classWt_1_1WBootstrap5Theme.html" target="_blank">WBootstrap5Theme</a> to support color modes. Some changes to
<a href="classWt_1_1WBootstrap5Theme.html" target="_blank">WBootstrap5Theme</a> custom css for wt have also be made to support
dark mode.
It is also possible to react to color mode changes by connecting to the
<a href="classWt_1_1WApplication.html#ad9f67bae1c1ff7100cd46258553817d4" target="_blank">WApplication::themeColorModeChanged()</a> signal and
to check the preferred color scheme of the client using
<a href="classWt_1_1WEnvironment.html#a9f77d68ae27a0ff1f22a6d3aefe07185" target="_blank">WEnvironment::preferredColorScheme()</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14047" target="_blank">Issue #14047</a>:
added the possibility to define an endpoint to which Content Security Policy (CSP) violation reports are sent by the browser.
This can be configured using the <code>debug-csp</code> and <code>csp-debug-endpoint</code> configuration options in the
<code>wt_config.xml</code> file. Note that this does not requires <code>use-script-nonce</code> to be set to <code>true</code>,
allowing you to debug CSP issues without breaking your application by enforcing it.
Additionally,
<a href="classWt_1_1WCspErrorLogger.html" target="_blank">WCspErrorLogger</a> was added to facilitate logging of CSP
violation reports. This new
<a href="classWt_1_1WResource.html" target="_blank">WResource</a> can be used to log CSP violations
reported by the browser. You can also create your own
<a href="classWt_1_1WResource.html" target="_blank">WResource</a> to handle the reports.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14494" target="_blank">Issue #14494</a>:
added
<a href="classWt_1_1WWidget.html#ab4e595dd2fd53ec3648409e44b58ce32" target="_blank">WWidget::anchorAt()</a>
which anchor the widget to another one using CSS position-area, and in addition, makes the widget disappear when its position-anchor
is scrolled out of view. This is now used by default for
<a href="classWt_1_1WPopupMenu.html" target="_blank">WPopupMenu</a>s inside
<a href="classWt_1_1WPushButton.html" target="_blank">WPushButton</a>.
Additionally, changed
<a href="classWt_1_1WWidget.html#af0df90fe8bbcb42dd057f8c1f1835b49" target="_blank">WWidget::positionAt()</a>
to use CSS position-anchor, when available, to avoid the need reparent the popup widgets while still allowing
them to keep the correct position when the anchor widget is moved due to scrolling.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14213" target="_blank">Issue #14213</a>:
Added
<a href="classWt_1_1Dbo_1_1Query.html#ad95a5bc43cf4f8484574496d42db7738" target="_blank">Wt::Dbo::Query::with()</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/993" target="_blank">Issue #993</a>:
Add the
<a href="classWt_1_1Dbo_1_1NotificationListener.html" target="_blank">Dbo::NotificationListener</a>, which allows to send and receive notifications through a database.
This is currently only implemented for PostgreSQL, but can be implemented for other Dbo by making a custom implementation of the following functions:
<ul>
<li><a href="classWt_1_1Dbo_1_1SqlConnection.html#ab5008c26e355303c276ad847fa9af4a0" target="_blank">Dbo::SqlConnection::subscribe()</a></li>
<li><a href="classWt_1_1Dbo_1_1SqlConnection.html#a1f6d207b50a5b0ed88fa21bb5945dc1a" target="_blank">Dbo::SqlConnection::notify()</a></li>
<li><a href="classWt_1_1Dbo_1_1SqlConnection.html#ab324381df8db923d165bea8b7afa5532" target="_blank">Dbo::SqlConnection::getNextNotify()</a></li>
<li><a href="classWt_1_1Dbo_1_1SqlConnection.html#a0f76caf1e8b8ba6e21fdbf64f2c6a1c5" target="_blank">Dbo::SqlConnection::setupNotify()</a></li>
<li><a href="classWt_1_1Dbo_1_1SqlConnection.html#adb0aee2ce0f35ae4f268e1bceb376b9f" target="_blank">Dbo::SqlConnection::stopListen()</a></li>
</ul>
</li>
<li>
<a href="https://redmine.emweb.be/issues/13499" target="_blank">Issue #13499</a>:
adds support for cookies prefix in Wt::Auth. It is now possible to select the prefix of
the remember-me cookies via the
<a href="classWt_1_1Auth_1_1AuthService.html#a3fd5f9c0e4db84849d13665830ae6b54" target="_blank">AuthService::setAuthTokensEnabled()</a>,
and
<a href="classWt_1_1Auth_1_1AuthService.html#a0b5f5b5ed79f215b44d13861e5adceff" target="_blank">AuthService::setMfaTokenCookiePrefix()</a>
functions. By default the <code>__Secure-</code> is now used when the connection is done over https.
This might break existing applications that rely on
<a href="classWt_1_1Auth_1_1AuthService.html#a14681ebd1a116357762b577f9b770149" target="_blank">AuthService::authTokenCookieName()</a>
or
<a href="classWt_1_1Auth_1_1AuthService.html#a52db9a68ccb2ce29b50a560fe386f49d" target="_blank">AuthService::mfaTokenCookieName()</a>
to return the full name of the cookie, or applications that rely on the remember-me cookie having a specific name.
If that is your case, consider setting the cookie prefix to
<a href="namespaceWt_1_1Auth.html#a9057020ce69c5a162c0766dc63b466a5" target="_blank">AuthCookiePrefix::Empty()</a>.
This also adds some helper classes and functions that can be used to create and retrieve the
value of cookies with prefixes.
The <a href="classWt_1_1Http_1_1SecureCookie.html" target="_blank">Http::SecureCookie</a>
and <a href="classWt_1_1Http_1_1HostCookie.html" target="_blank">Http::HostCookie</a> classes
can be used to easily create cookies with prefix, and the
<a href="classWt_1_1WEnvironment.html#a535ed99087c3e2de6241b0219cdfad4a" target="_blank">WEnvironment::getSecureCookie()</a> and
<a href="classWt_1_1WEnvironment.html#ac9cb11d1d72b5e83b28df76ac7f43fa7" target="_blank">WEnvironment::getHostCookie()</a> can
be used to retrieve the value of cookies with the corresponding prefix from the user's browser.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14571" target="_blank">Issue #14571</a>:
added
<a href="classWt_1_1WTableView.html#a758e93e27af525ca489557bccf459da2" target="_blank">WTableView::incomingIndex()</a>
which allows to retrieve the index of the next cell that is not yet fully visible in the viewport
in the direction of the given corner.
</li>
<li>
<a href="https://redmine.emweb.be/issues/13787" target="_blank">Issue #13787</a>:
added
<a href="classWt_1_1WTableView.html#a606039eb8b7d3e399bdb8024787c1fb8" target="_blank">WTableView::visibleRowCount()</a>
and
<a href="classWt_1_1WTableView.html#adee027fcac266b887c6908e368a68a0b" target="_blank">WTableView::visibleColumnCount()</a>
which allow to retrieve the number of fully visible rows and columns.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14493" target="_blank">Issue #14493</a>:
allowed to ignore bubbling
<a href="classWt_1_1EventSignal.html" target="_blank">EventSignal</a> using
<a href="classWt_1_1EventSignalBase.html#a493ddaa7a9332c7880f6e005c2a0b9cb" target="_blank">EventSignal::ignoreBubbling()</a>.
</li>
</ul>
<p>Wt 4.14.0 also fixes the following bugs:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14476" target="_blank">Issue #14476</a>:
fixed non-modal
<a href="classWt_1_1WDialog.html" target="_blank">WDialog</a> not being able to receive focus
if none of their descendants could. This would make it impossible for the
<a href="classWt_1_1WDialog.html" target="_blank">WDialog</a> to receive any event.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14603" target="_blank">Issue #14603</a>:
fixed
<a href="classWt_1_1WMenu.html" target="_blank">WMenu</a> internal path matching considering
prefix matches as valid even when they did not end on a path segment boundary.
</li>
<li>
<a href="https://redmine.emweb.be/issues/3824" target="_blank">Issue #3824</a>:
resolved a concurrent usage of <a href="classWt_1_1WServer.html#ae8dbb9cc4e418517ee0568a0dd1df182" target="_blank">WServer::localizedStrings()</a>.
This was achieved by making items inside <a href="classWt_1_1WMessageResourceBundle.html" target="_blank">WMessageResourceBundle</a> (namely <code>WMessageResources</code>) thread-safe.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14654" target="_blank">Issue #14654</a>:
fixed compile errors happening when using OpenSSL 4.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14497" target="_blank">Issue #14497</a>:
fixed compilation errors when compiling Wt with C++26.
</li>
</ul>
<p>Wt 4.14.0 also comes with the following improvements:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14078" target="_blank">Issue #14078</a>:
Wt now uses uses the <code>inline-start</code>, <code>inline-end</code>, <code>block-start</code>, and <code>block-end</code>
variants of CSS margin, padding, and border properties. This is mainly an internal change, but it should help decrease
bug related to right-to-left support.
Additionally,
<a href="classWt_1_1WBootstrap5Theme.html" target="_blank">WBootstrap5Theme</a> will now use the RTL version of Bootstrap 5 CSS when
<a href="classWt_1_1WApplication.html#a44c5f0398b5539269be3961b26e95b08" target="_blank">WApplication::setLayoutDirection()</a> is used to set the
layout direction to <code>LayoutDirection::RightToLeft</code>.
With those changes also comes several bug fixes and improvements related to RTL support.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14479" target="_blank">Issue #14479</a>:
added the possibility to configure whether a MIME type should be allowed to be
compressed on the fly by the server when being sent to the client by wthttp. This
can be done by adding a third (optional) column to the MIME type configuration file
with a boolean value indicating whether the MIME type should be compressed or not.
Additionally, excepted for some specific MIME types, wthttp will by default be allowed
to compress any MIME type that are not audio, image, or video.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14468" target="_blank">Issue #14468</a>:
added the possibility to know the visibility state of the application using the new
<a href="classWt_1_1WApplication.html#a4e71102a866d0658a4aaecba80ceeae9" target="_blank">WApplication::visibilityState()</a>, and
to be notified when it changes using the new
<a href="classWt_1_1WApplication.html#af34126f4f6f2b93c98bb99da2507dc22" target="_blank">WApplication::visibilityChanged()</a> signal.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14584" target="_blank">Issue #14584</a>:
added the possibility to change the charts legend and title text color using
<a href="classWt_1_1Chart_1_1WCartesian3DChart.html#a839a0c8cb83b02fdd184e7c01928c221" target="_blank">WCartesian3DChart::setTitleColor()</a>,
<a href="classWt_1_1Chart_1_1WAbstractChart.html#a0850f2aa0b9d5da5dba9f446861d2a49" target="_blank">WAbstractChart::setTitleColor()</a>,
<a href="classWt_1_1Chart_1_1WCartesian3DChart.html#a079171fc181627ed11076763eeca2f97" target="_blank">WCartesian3DChart::setLegendStyle()</a>,
<a href="classWt_1_1Chart_1_1WCartesianChart.html#a5c0beac0ce9183dae3f261c62bfae292" target="_blank">WCartesianChart::setLegendStyle()</a>, and
<a href="classWt_1_1Chart_1_1WPieChart.html#a1976f7ba7c6f4edd5872ba7034f3cfed" target="_blank">WPieChart::setLabelTextColor()</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14550" target="_blank">Issue #14550</a>:
reduced the amount of duplicated JavaScript code generated for signals.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14462" target="_blank">Issue #14462</a>:
added
<a href="classWt_1_1WKeyEvent.html#afaf43407e19769fce1957d84b4056b76" target="_blank">WKeyEvent::keyValue()</a>, which
allows to access the <code>key</code> property of the JavaScript key event that is
sent to the server.
</li>
<li>
<a href="https://redmine.emweb.be/issues/13825" target="_blank">Issue #13825</a>:
it is now possible to remove or update polylines and circles on a
<a href="classWt_1_1WLeafletMap.html" target="_blank">WLeafletMap</a>.
To make this possible, those elements are now represented by the classes
<a href="classWt_1_1WLeafletMap_1_1Polyline.html" target="_blank">WLeafletMap::Polyline</a>
and
<a href="classWt_1_1WLeafletMap_1_1Circle.html" target="_blank">WLeafletMap::Circle</a>
respectively, which are map items, like
<a href="classWt_1_1WLeafletMap_1_1Marker.html" target="_blank">WLeafletMap::Marker</a>
for instance.
These new classes can be added or removed from the map using
<a href="classWt_1_1WLeafletMap.html#a0b855e1d88046ad195b6d02b7123f1f2" target="_blank">WLeafletMap::addPolyline()</a>,
<a href="classWt_1_1WLeafletMap.html#a86e144d405ae4861529875bf5c19271a" target="_blank">WLeafletMap::removePolyline()</a>,
<a href="classWt_1_1WLeafletMap.html#a0e04c48a32a4e6b50cc47537d744fff6" target="_blank">WLeafletMap::addCircle()</a> and,
<a href="classWt_1_1WLeafletMap.html#abf1195588199c9cb0d429b3e95934fb8" target="_blank">WLeafletMap::removeCircle()</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/13856" target="_blank">Issue #13856</a>:
added the possibility to change whether widgets are rendered using native controls
by default. This can be done using the new function
<a href="classWt_1_1WWebWidget.html#a2536488d7b48671b3cb3a171c362bcd3" target="_blank">WWebWidget::setDefaultNativeControl()</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/12464" target="_blank">Issue #12464</a>:
added the possibility to specify the MIME type when calling
<a href="classWt_1_1WStreamResource.html#a6397570c842aa542bb195b6b31c2dab6" target="_blank">WStreamResource::handleRequestPiecewise()</a>,
allowing to override the MIME type set by
<a href="classWt_1_1WStreamResource.html#aa25f97d38747be9451336422029bbde5" target="_blank">WStreamResource::setMimeType()</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14593" target="_blank">Issue #14593</a>:
added the possibility to configure whether a request with an invalid session ID should be treated
like a bot request or not. This can be configured using the <code>is-invalid-wtd-suspicious</code>
option in the <code>wt_config.xml</code> file. This is mainly usefull when having the
<code>reload-is-new-session</code> option set to <code>false</code>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14557" target="_blank">Issue #14557</a>:
stopped required scripts loading failure from stopping the application from the client side, making it impossible to
recover from such failure. Instead, more detail will be logged about the failure so that developers can decide how to handle it.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14074" target="_blank">Issue #14074</a>:
added the possibility to ignore the current local when using
<a href="classWt_1_1WDate.html#a899adee8d72161fa6bb08509a5e10ec0" target="_blank">WDate::fromString()</a>
or
<a href="classWt_1_1WDateTime.html#a403de3403bdce0885999d28fc53fdfcf" target="_blank">WDateTime::fromString()</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14044" target="_blank">Issue #14044</a>:
added
<a href="classWt_1_1Dbo_1_1Session.html#a359aec75ed8947531c2c8f278ee32b3c" target="_blank">Dbo::Session::transactionCount()</a>
that returns the number of open
<a href="classWt_1_1Dbo_1_1Transaction.html" target="_blank">Dbo::Transaction</a>,
for the <a href="classWt_1_1Dbo_1_1Session.html" target="_blank">Dbo::Session</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14625" target="_blank">Issue #14625</a>:
added the possibility to use a custom random number generator for Wt using
<a href="classWt_1_1WRandom.html#ae641c67f8897a8f4fd1e0701f9aa6a81" target="_blank">WRandom::setGenerator()</a> and
<a href="classWt_1_1WRandom.html#ac4c462df437bfd67370413b9d2609f43" target="_blank">WRandom::setUniformGenerator()</a>.
This can be used in case the default random number generator does not work correctly on a specific platform.
</li>
<li>
<a href="https://redmine.emweb.be/issues/13666" target="_blank">Issue #13666</a>:
bumped the minimum required C++ standard to build Wt to C++17. This means that all uses of <code>WT_CXX17</code> and
<code>WT_CXX17ONLY</code> were removed in Wt's source code. <code>WT_CXX17</code> is now always defined, since Wt requires
C++17.
Additionnaly <code>Wt::cpp17::any</code> is now marked as deprecated, since this only existed because C++14
lacked <code>std::any</code>.
</li>
</ul>
<h2>Release 4.13.4 (July 2, 2026)</h2>
<p>Wt 4.13.4 is a patch release that addresses the following issues:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14615" target="_blank">Issue #14615</a>:
fixed a memory leak sometimes happening when using a spool file.
</li>
</ul>
<p>Wt 4.13.4 also comes with the following improvements:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14630" target="_blank">Issue #14630</a>:
disabled form data caching by default, as it still has some bugs that need to be fixed.
</li>
</ul>
<h2>Release 4.13.3 (June 16, 2026)</h2>
<p>Wt 4.13.3 is a patch release that addresses the following issues:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14513" target="_blank">Issue #14513</a>:
fixed form data sometimes being updated for events where it should not be updated,
or not being updated for events where it should. This was mainly causing issues with
Firefox.
</li>
<li>
<a href="https://redmine.emweb.be/issues/12463" target="_blank">Issue #12463</a>:
made
<a href="classWt_1_1WStreamResource.html#ab83350ee7a4a14ad06965145073b0293" target="_blank">WStreamResource::handleRequestPiecewise()</a>
able to concurrently handle multiple requests correctly.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14150" target="_blank">Issue #14150</a>:
fixed
sub-sub-<a href="classWt_1_1WPopupMenu.html" target="_blank">WPopupMenu</a> sometimes popping
up behind its parent menu.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14575" target="_blank">Issue #14575</a>:
fixed
<a href="classWt_1_1WDateEdit.html" target="_blank">WDateEdit</a> and
<a href="classWt_1_1WTimeEdit.html" target="_blank">WTimeEdit</a> popups missing some style classes when the editor started hidden.
</li>
<li>
<a href="https://redmine.emweb.be/issues/12407" target="_blank">Issue #12407</a>:
fixed submenus wrongly selecting themselves when clearing their selection using
<a href="classWt_1_1WMenu.html#aec1801d047dc0f150d1cc12b801aa6c2" target="_blank">WMenu::select(-1)</a>. This meant that
instead of clearing the selection of a submenu, calling
<a href="classWt_1_1WMenu.html#aec1801d047dc0f150d1cc12b801aa6c2" target="_blank">WMenu::select(-1)</a> would actually
select the first item of the submenu.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14576" target="_blank">Issue #14576</a>:
fixed adding an empty path component or changing a path component to an empty one in a
<a href="classWt_1_1WMenu.html" target="_blank">WMenu</a> would change the selected
item to the one with the empty path component if the
<a href="classWt_1_1WMenu.html" target="_blank">WMenu</a> had internal path enabled.
</li>
<li>
<a href="https://redmine.emweb.be/issues/12073" target="_blank">Issue #12073</a>:
fixed compilation error on windows when compiling <code>wtdbopostgres.lib</code> with C++17 or higher.
</li>
<li>
<a href="https://redmine.emweb.be/issues/10923" target="_blank">Issue #10923</a>:
fixed various entries of <a href="classWt_1_1WEnvironment.html" target="_blank">WEnvironment</a> properties
not being set in
<a href="namespaceWt.html#af4b6ed5fd28b4f5fa141b153c1107349accf2281a355c2c9cd4698ac30bea7820" target="_blank">Widgetset</a> mode.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14527" target="_blank">Issue #14527</a>:
fixed resize handles in layouts adding extra space at the end of a row or column.
</li>
<li>
<a href="https://redmine.emweb.be/issues/12429" target="_blank">Issue #12429</a>:
fixed
<a href="classWt_1_1WAbstractItemView.html" target="_blank">WAbstractItemView</a> not resetting
the sorted column when changing or resetting its model.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14572" target="_blank">Issue #14572</a>:
fixed
<a href="classWt_1_1WAbstractItemView.html#ae68d56771c5e9d408d78b4b9d198967f" target="_blank">WAbstractItemView::scrollTo()</a>
not fully scrolling the column to the left when it should, leading to the right border of the last column being hidden.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14576" target="_blank">Issue #14576</a>:
fixed
<a href="classWt_1_1WTemplate.html" target="_blank">WTemplate</a> with bound widgets executing JavaScript code on the client side when calling
<a href="classWt_1_1WTemplate.html#a98baf277a7dd3144a38edb77cbb3d284" target="_blank">WTemplate::renderTemplate()</a>.
Additionally,
<a href="classWt_1_1WWidget.html#aaae07190fb97d856149226ea315a75d0" target="_blank">WWidget::htmlText()</a> will no longer execute JavaScript code,
but will instead stream the JavaScript code to the optional
<a href="classWt_1_1WStringStream.html" target="_blank">WStringStream</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/9106" target="_blank">Issue #9106</a>:
fixed a race condition that could lead to websocket connections not being closed at the destruction of the session.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14579" target="_blank">Issue #14579</a>:
ensured that
<a href="classWt_1_1WResource.html" target="_blank">WResource</a> suggested file names
fallback for browser that do not support RFC 5987 are sent without non-ASCII characters
to maximize retrocompatibility.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14172" target="_blank">Issue #14172</a>:
fixed
<a href="classWt_1_1WTextEdit.html" target="_blank">WTextEdit</a> making the
application crash when the configured TinyMCE version was not a valid integer.
</li>
<li>
<a href="https://redmine.emweb.be/issues/13907" target="_blank">Issue #13907</a>:
fixed a warning about an incorrect version of TinyMCE sometimes being logged when the correct version was actually used.
</li>
</ul>
<p>Wt 4.13.3 also comes with the following improvements: </p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/12664" target="_blank">Issue #12664</a>:
added the possibility to check whether a
<a href="classWt_1_1Mail_1_1Client.html" target="_blank">Mail::Client</a> is connected
to an SMTP server using
<a href="classWt_1_1Mail_1_1Client.html#a77e59d60fe764dd199a86a7fe922ac9b" target="_blank">Mail::Client::isConnected()</a>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14473" target="_blank">Issue #14473</a>:
made
<a href="classWt_1_1WDialog.html#a7dd5be946b39806805285cfa7416757f" target="_blank">WDialog::positionAt(WMouseEvent)</a>
also show the dialog.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14045" target="_blank">Issue #14045</a>:
added debug logging when committing or rolling back a
<a href="classWt_1_1Dbo_1_1Transaction.html" target="_blank">Dbo::Transaction</a>.
The case where the transaction is nested, and would not immediately commit, is logged as well.
</li>
<li>
<a href="https://redmine.emweb.be/issues/12815" target="_blank">Issue #12815</a>:
added some clarification to the documentation of
<a href="namespaceWt_1_1Form_1_1Dbo.html" target="_blank">Form::Dbo</a> classes.
</li>
</ul>
<h2>Release 4.13.2 (May 7, 2026)</h2>
<p>Wt 4.13.2 is a patch release that addresses the following issues:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14490" target="_blank">Issue #14490</a>:
fixed form object data not being correctly cached when updated via signal. It seems that
it mainly caused issues with browser auto-fill.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14469" target="_blank">Issue #14469</a>:
fixed
<a href="classWt_1_1WGroupBox.html" target="_blank">WGroupBox</a> being unable to add or insert widgets.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14482" target="_blank">Issue #14482</a>:
fixed
<a href="classWt_1_1WApplication.html#a1918508a02889373a9e1fc1d872f2753" target="_blank">WApplication::focusedWidget()</a>
returning nullptr when the focused widget was inside of a popup.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14488" target="_blank">Issue #14488</a>:
fixed
<a href="classWt_1_1WApplication.html#a60c1defb57949f6f78c6c1373a18e74e" target="_blank">Global key events</a>
not being emitted if connected for the first time after the page had already been loaded by the client.
</li>
<li>
<a href="https://redmine.emweb.be/issues/14481" target="_blank">Issue #14481</a>:
ensured that <code>XHTML</code> content in a <a href="classWt_1_1WPushButton.html" target="_blank">WPushButton</a> is correctly
rendered as such, in case of the content being a localized string, containing an <code>XHTML entity</code>.
</li>
<li>
<a href="https://redmine.emweb.be/issues/7974" target="_blank">Issue #7974</a>:
fixed
<a href="classWt_1_1WPopupMenu.html" target="_blank">WPopupMenu</a> and
<a href="classWt_1_1WPopupWidget.html" target="_blank">WPopupWidget</a>
not avoiding being cut off by the edges of their parent widget when being
positioned.
</li>
<li>
<a href="https://redmine.emweb.be/issues/11704" target="_blank">Issue #11704</a>
fixed Wt not being able to dynamically link against libharu versions 2.4.2 and higher on Windows.
Additionally, the version of libharu bundled with Wt binary releases on Windows has been updated from 2.3.0 to 2.4.6.
</li>
</ul>
<p>Wt 4.13.2 also comes with the following improvements:</p>
<ul>
<li>
<a href="https://redmine.emweb.be/issues/14367" target="_blank">Issue #14367</a>:
made it possible to scroll a
<a href="classWt_1_1WTableView.html" target="_blank">WTableView</a> when having the mouse over a
header (column or row) if scrolling in that direction would make that header move.