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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/58068">58068</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/58068","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>swissspidy</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2024-05-01 15:40:02 +0000 (Wed, 01 May 2024)</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'>Script Loader: Ensure `wp_localize_script()` works when called early.

Before, `wp_localize_script()` did not work when the `$wp_scripts` global was not already set (for example because of a script registration happening elsewhere) and even emitted a warning in that case. Due to side effects such as block registration early in the load process, this usually never happened. However, the absence of these side effects in 6.5 caused the `wp_localize_script()` to no longer work in places such as the `login_enqueue_scripts`.

By calling `wp_scripts()` in `wp_localize_script()`, the `$wp_scripts` global is automatically set if needed, restoring previous behavior. Adds both a PHP unit test and an e2e test to verify this use case. Hat tip: jorbin.

Happy birthday, Aaron!

Props salcode, aslamdoctor, jorbin, swissspidy.
Fixes <a href="https://core.trac.wordpress.org/ticket/60862">#60862</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesfunctionswpscriptsphp">trunk/src/wp-includes/functions.wp-scripts.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunktestse2especsloginlocalizescripttestjs">trunk/tests/e2e/specs/login-localize-script.test.js</a></li>
<li><a href="#trunktestsphpunittestsdependencieswpLocalizeScriptphp">trunk/tests/phpunit/tests/dependencies/wpLocalizeScript.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesfunctionswpscriptsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/functions.wp-scripts.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/functions.wp-scripts.php    2024-04-30 16:43:09 UTC (rev 58067)
+++ trunk/src/wp-includes/functions.wp-scripts.php      2024-05-01 15:40:02 UTC (rev 58068)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -211,7 +211,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @see WP_Scripts::localize()
</span><span class="cx" style="display: block; padding: 0 10px">  * @link https://core.trac.wordpress.org/ticket/11520
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
</del><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 2.2.0
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -224,13 +223,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @return bool True if the script was successfully localized, false otherwise.
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> function wp_localize_script( $handle, $object_name, $l10n ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        global $wp_scripts;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $wp_scripts = wp_scripts();
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
-               _wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
-               return false;
-       }
-
</del><span class="cx" style="display: block; padding: 0 10px">         return $wp_scripts->localize( $handle, $object_name, $l10n );
</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="trunktestse2especsloginlocalizescripttestjs"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/e2e/specs/login-localize-script.test.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/e2e/specs/login-localize-script.test.js                               (rev 0)
+++ trunk/tests/e2e/specs/login-localize-script.test.js 2024-05-01 15:40:02 UTC (rev 58068)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,53 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/**
+ * External dependencies
+ */
+import { existsSync, mkdirSync, writeFileSync, unlinkSync } from 'node:fs';
+import { join } from 'node:path';
+
+/**
+ * WordPress dependencies
+ */
+import { test, expect } from '@wordpress/e2e-test-utils-playwright';
+
+test.describe( 'Localize Script on wp-login.php', () => {
+       const muPlugins = join(
+               process.cwd(),
+               process.env.LOCAL_DIR ?? 'src',
+               'wp-content/mu-plugins'
+       );
+       const muPluginFile = join( muPlugins, 'login-test.php' );
+
+       test.beforeAll( async () => {
+               const muPluginCode = `<?php
+               add_action(
+                       'login_enqueue_scripts',
+                       function() {
+                         wp_localize_script(
+                               'wp-util',
+                               'testData',
+                               [
+                                 'answerToTheUltimateQuestionOfLifeTheUniverseAndEverything' => 42,
+                               ]
+                         );
+                       }
+                 );`;
+
+               if ( ! existsSync( muPlugins ) ) {
+                       mkdirSync( muPlugins, { recursive: true } );
+               }
+               writeFileSync( muPluginFile, muPluginCode );
+       } );
+
+       test.afterAll( async () => {
+               unlinkSync( muPluginFile );
+       } );
+
+       test( 'should localize script', async ( { page } ) => {
+               await page.goto( '/wp-login.php' );
+               await page.waitForSelector( '#login' );
+               const testData = await page.evaluate( () => window.testData );
+               expect(
+                       testData.answerToTheUltimateQuestionOfLifeTheUniverseAndEverything
+               ).toBe( '42' );
+       } );
+} );
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/e2e/specs/login-localize-script.test.js
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunktestsphpunittestsdependencieswpLocalizeScriptphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/dependencies/wpLocalizeScript.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/dependencies/wpLocalizeScript.php                               (rev 0)
+++ trunk/tests/phpunit/tests/dependencies/wpLocalizeScript.php 2024-05-01 15:40:02 UTC (rev 58068)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,41 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * @group dependencies
+ * @group scripts
+ */
+class Tests_Dependencies_LocalizeScript extends WP_UnitTestCase {
+       /**
+        * @var WP_Scripts
+        */
+       protected $old_wp_scripts;
+
+       public function set_up() {
+               parent::set_up();
+
+               $this->old_wp_scripts  = $GLOBALS['wp_scripts'] ?? null;
+               $GLOBALS['wp_scripts'] = null;
+       }
+
+       public function tear_down() {
+               $GLOBALS['wp_scripts'] = $this->old_wp_scripts;
+               parent::tear_down();
+       }
+
+       /**
+        * Verifies that wp_localize_script() works if global has not been initialized yet.
+        *
+        * @ticket 60862
+        * @covers ::wp_localize_script
+        */
+       public function test_wp_localize_script_works_before_enqueue_script() {
+               $this->assertTrue(
+                       wp_localize_script(
+                               'wp-util',
+                               'salcodeExample',
+                               array(
+                                       'answerToTheUltimateQuestionOfLifeTheUniverseAndEverything' => 42,
+                               )
+                       )
+               );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/tests/dependencies/wpLocalizeScript.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span></div>

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