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<title>[51677] trunk/src: Customizer: Respect `prefers-reduced-motion` media query in Customizer animations.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/51677">51677</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/51677","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>mikeschroder</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2021-08-27 09:35:17 +0000 (Fri, 27 Aug 2021)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Customizer: Respect `prefers-reduced-motion` media query in Customizer animations.
Disables Customizer animations when media query `prefers-reduced-motion: reduce` returns true.
Continues the effort to reduce motion within the WordPress admin panel when users have enabled this feature in their operating system or browser.
It has the additional effect of making the Block Editor's end-to-end tests run faster, as explored initially with a different approach in <a href="https://core.trac.wordpress.org/ticket/53562">#53562</a>.
See https://github.com/WordPress/gutenberg/issues/32024 for the related Gutenberg issue.
See https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-reduced-motion for ways to enable this feature on various platforms.
Props kevin940726, isabel_brison, zieladam, youknowriad, desrosj, mamaduka, mikeschroder.
Previously <a href="https://core.trac.wordpress.org/changeset/51389">[51389]</a>, <a href="https://core.trac.wordpress.org/changeset/50028">[50028]</a>, <a href="https://core.trac.wordpress.org/changeset/47813">[47813]</a>.
Fixes <a href="https://core.trac.wordpress.org/ticket/53542">#53542</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcjs_enqueueswpcustomizecontrolsjs">trunk/src/js/_enqueues/wp/customize/controls.js</a></li>
<li><a href="#trunksrcwpadmincsscustomizecontrolscss">trunk/src/wp-admin/css/customize-controls.css</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcjs_enqueueswpcustomizecontrolsjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/js/_enqueues/wp/customize/controls.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/js/_enqueues/wp/customize/controls.js 2021-08-26 19:33:22 UTC (rev 51676)
+++ trunk/src/js/_enqueues/wp/customize/controls.js 2021-08-27 09:35:17 UTC (rev 51677)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -6,6 +6,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> (function( exports, $ ){
</span><span class="cx" style="display: block; padding: 0 10px"> var Container, focus, normalizedTransitionendEventName, api = wp.customize;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ var reducedMotionMediaQuery = window.matchMedia( '(prefers-reduced-motion: reduce)' );
+ var isReducedMotion = reducedMotionMediaQuery.matches;
+ reducedMotionMediaQuery.addEventListener( 'change' , function handleReducedMotionChange( event ) {
+ isReducedMotion = event.matches;
+ });
+
</ins><span class="cx" style="display: block; padding: 0 10px"> api.OverlayNotification = api.Notification.extend(/** @lends wp.customize.OverlayNotification.prototype */{
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1264,11 +1270,14 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return {void}
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> _animateChangeExpanded: function( completeCallback ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- // Return if CSS transitions are not supported.
- if ( ! normalizedTransitionendEventName ) {
- if ( completeCallback ) {
- completeCallback();
- }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Return if CSS transitions are not supported or if reduced motion is enabled.
+ if ( ! normalizedTransitionendEventName || isReducedMotion ) {
+ // Schedule the callback until the next tick to prevent focus loss.
+ _.defer( function () {
+ if ( completeCallback ) {
+ completeCallback();
+ }
+ } );
</ins><span class="cx" style="display: block; padding: 0 10px"> return;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span></span></pre></div>
<a id="trunksrcwpadmincsscustomizecontrolscss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/css/customize-controls.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/css/customize-controls.css 2021-08-26 19:33:22 UTC (rev 51676)
+++ trunk/src/wp-admin/css/customize-controls.css 2021-08-27 09:35:17 UTC (rev 51677)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -105,6 +105,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> height: 100%;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+@media (prefers-reduced-motion: reduce) {
+ #customize-sidebar-outer-content {
+ transition: none;
+ }
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> #customize-theme-controls .control-section-outer {
</span><span class="cx" style="display: block; padding: 0 10px"> display: none !important;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -123,6 +129,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> transition: left .18s;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+@media (prefers-reduced-motion: reduce) {
+ .outer-section-open .wp-full-overlay.expanded #customize-sidebar-outer-content {
+ transition: none;
+ }
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> .customize-outer-pane-parent {
</span><span class="cx" style="display: block; padding: 0 10px"> margin: 0;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -537,6 +549,13 @@
</span><span class="cx" style="display: block; padding: 0 10px"> .15s border-color ease-in-out;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+@media (prefers-reduced-motion: reduce) {
+ #customize-theme-controls .accordion-section-title,
+ #customize-outer-theme-controls .accordion-section-title {
+ transition: none;
+ }
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> #customize-controls #customize-theme-controls .customize-themes-panel .accordion-section-title {
</span><span class="cx" style="display: block; padding: 0 10px"> color: #50575e;
</span><span class="cx" style="display: block; padding: 0 10px"> background-color: #fff;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -635,6 +654,14 @@
</span><span class="cx" style="display: block; padding: 0 10px"> transition: 0.18s transform cubic-bezier(0.645, 0.045, 0.355, 1); /* easeInOutCubic */
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+@media (prefers-reduced-motion: reduce) {
+ #customize-info,
+ #customize-theme-controls .customize-pane-parent,
+ #customize-theme-controls .customize-pane-child {
+ transition: none;
+ }
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> #customize-theme-controls .customize-pane-child.skip-transition {
</span><span class="cx" style="display: block; padding: 0 10px"> transition: none;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1723,6 +1750,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> z-index: 20;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+@media (prefers-reduced-motion: reduce) {
+ .control-panel-themes .customize-themes-full-container {
+ transition: none;
+ }
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> @media screen and (min-width: 1670px) {
</span><span class="cx" style="display: block; padding: 0 10px"> .control-panel-themes .customize-themes-full-container {
</span><span class="cx" style="display: block; padding: 0 10px"> width: 82%;
</span></span></pre>
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