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<title>[51072] trunk/src/wp-content/themes/twentytwentyone/assets/js/primary-navigation.js: Twenty Twenty-One: Check for navigation element before using it.</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/51072">51072</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/51072","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>ryelle</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2021-06-04 17:06:15 +0000 (Fri, 04 Jun 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'>Twenty Twenty-One: Check for navigation element before using it.
This prevents a javascript error in case the primary navigation has been removed, for example in a child theme.
Props sushmak.
Fixes <a href="https://core.trac.wordpress.org/ticket/52773">#52773</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpcontentthemestwentytwentyoneassetsjsprimarynavigationjs">trunk/src/wp-content/themes/twentytwentyone/assets/js/primary-navigation.js</a></li>
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<h3>Diff</h3>
<a id="trunksrcwpcontentthemestwentytwentyoneassetsjsprimarynavigationjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-content/themes/twentytwentyone/assets/js/primary-navigation.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-content/themes/twentytwentyone/assets/js/primary-navigation.js 2021-06-04 10:47:01 UTC (rev 51071)
+++ trunk/src/wp-content/themes/twentytwentyone/assets/js/primary-navigation.js 2021-06-04 17:06:15 UTC (rev 51072)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -96,8 +96,14 @@
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> var navMenu = function( id ) {
</span><span class="cx" style="display: block; padding: 0 10px"> var wrapper = document.body, // this is the element to which a CSS class is added when a mobile nav menu is open
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- mobileButton = document.getElementById( id + '-mobile-menu' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ mobileButton = document.getElementById( id + '-mobile-menu' ),
+ navMenuEl = document.getElementById( 'site-navigation' );
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // If there's no nav menu, none of this is necessary.
+ if ( ! navMenuEl ) {
+ return;
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> if ( mobileButton ) {
</span><span class="cx" style="display: block; padding: 0 10px"> mobileButton.onclick = function() {
</span><span class="cx" style="display: block; padding: 0 10px"> wrapper.classList.toggle( id + '-navigation-open' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -167,7 +173,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> } );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- document.getElementById( 'site-navigation' ).querySelectorAll( '.menu-wrapper > .menu-item-has-children' ).forEach( function( li ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ navMenuEl.querySelectorAll( '.menu-wrapper > .menu-item-has-children' ).forEach( function( li ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> li.addEventListener( 'mouseenter', function() {
</span><span class="cx" style="display: block; padding: 0 10px"> this.querySelector( '.sub-menu-toggle' ).setAttribute( 'aria-expanded', 'true' );
</span><span class="cx" style="display: block; padding: 0 10px"> twentytwentyoneSubmenuPosition( li );
</span></span></pre>
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