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Move all hooks to the footer in classic themes and remove multiple pr…
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…ints functionality
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@luisherranz
luisherranz committed Jan 18, 2024
1 parent b6a9734 commit a7eaf39
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Showing 2 changed files with 17 additions and 107 deletions.
62 changes: 17 additions & 45 deletions src/wp-includes/class-wp-script-modules.php
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Original file line number Diff line number Diff line change
Expand Up @@ -92,15 +92,12 @@ public function register( string $id, string $src, array $deps = array(), $versi
'version' => $version,
'enqueue' => isset( $this->enqueued_before_registered[ $id ] ),
'dependencies' => $dependencies,
'enqueued' => false,
'preloaded' => false,
);
}
}

/**
* Marks the script module to be enqueued in the page the next time
* `print_enqueued_script_modules` is called.
* Marks the script module to be enqueued in the page.
*
* If a src is provided and the script module has not been registered yet, it
* will be registered.
Expand Down Expand Up @@ -164,74 +161,49 @@ public function dequeue( string $id ) {
* Adds the hooks to print the import map, enqueued script modules and script
* module preloads.
*
* It adds the actions to print the enqueued script modules and script module
* preloads to both `wp_head` and `wp_footer` because in classic themes, the
* script modules used by the theme and plugins will likely be able to be
* printed in the `head`, but the ones used by the blocks will need to be
* enqueued in the `footer`.
*
* As all script modules are deferred and dependencies are handled by the
* browser, the order of the script modules is not important, but it's still
* better to print the ones that are available when the `wp_head` is rendered,
* so the browser starts downloading those as soon as possible.
*
* The import map is also printed in the footer to be able to include the
* dependencies of all the script modules, including the ones printed in the
* In classic themes, the script modules used by the blocks are not yet known
* when the `wp_head` actions is fired, so it needs to print everything in the
* footer.
*
* @since 6.5.0
*/
public function add_hooks() {
add_action( 'wp_head', array( $this, 'print_enqueued_script_modules' ) );
add_action( 'wp_head', array( $this, 'print_script_module_preloads' ) );
add_action( 'wp_footer', array( $this, 'print_enqueued_script_modules' ) );
add_action( 'wp_footer', array( $this, 'print_script_module_preloads' ) );
add_action( 'wp_footer', array( $this, 'print_import_map' ) );
$position = wp_is_block_theme() ? 'wp_head' : 'wp_footer';
add_action( $position, array( $this, 'print_import_map' ) );
add_action( $position, array( $this, 'print_enqueued_modules' ) );
add_action( $position, array( $this, 'print_module_preloads' ) );
}

/**
* Prints the enqueued script modules using script tags with type="module"
* attributes.
*
* If a enqueued script module has already been printed, it will not be
* printed again on subsequent calls to this function.
*
* @since 6.5.0
*/
public function print_enqueued_script_modules() {
foreach ( $this->get_marked_for_enqueue() as $id => $script_module ) {
if ( false === $script_module['enqueued'] ) {
// Mark it as enqueued so it doesn't get enqueued again.
$this->registered[ $id ]['enqueued'] = true;

wp_print_script_tag(
array(
'type' => 'module',
'src' => $this->get_versioned_src( $script_module ),
'id' => $id . '-js-module',
)
);
}
wp_print_script_tag(
array(
'type' => 'module',
'src' => $this->get_versioned_src( $script_module ),
'id' => $id . '-js-module',
)
);
}
}

/**
* Prints the the static dependencies of the enqueued script modules using
* link tags with rel="modulepreload" attributes.
*
* If a script module is marked for enqueue, it will not be preloaded. If a
* preloaded script module has already been printed, it will not be printed
* again on subsequent calls to this function.
* If a script module is marked for enqueue, it will not be preloaded.
*
* @since 6.5.0
*/
public function print_script_module_preloads() {
foreach ( $this->get_dependencies( array_keys( $this->get_marked_for_enqueue() ), array( 'static' ) ) as $id => $script_module ) {
// Don't preload if it's marked for enqueue or has already been preloaded.
if ( true !== $script_module['enqueue'] && false === $script_module['preloaded'] ) {
// Mark it as preloaded so it doesn't get preloaded again.
$this->registered[ $id ]['preloaded'] = true;

// Don't preload if it's marked for enqueue.
if ( true !== $script_module['enqueue'] ) {
echo sprintf(
'<link rel="modulepreload" href="%s" id="%s">',
esc_url( $this->get_versioned_src( $script_module ) ),
Expand Down
62 changes: 0 additions & 62 deletions tests/phpunit/tests/script-modules/wpScriptModules.php
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Original file line number Diff line number Diff line change
Expand Up @@ -516,68 +516,6 @@ public function test_version_is_propagated_correctly() {
$this->assertEquals( '/dep.js?ver=2.0', $preloaded_script_modules['dep'] );
}

/**
* Tests that it can print the enqueued script modules multiple times, and it
* will only print the script modules that have not been printed before.
*
* @ticket 56313
*
* @covers ::register()
* @covers ::enqueue()
* @covers ::print_enqueued_script_modules()
*/
public function test_print_enqueued_script_modules_can_be_called_multiple_times() {
$this->script_modules->register( 'foo', '/foo.js' );
$this->script_modules->register( 'bar', '/bar.js' );
$this->script_modules->enqueue( 'foo' );

$enqueued_script_modules = $this->get_enqueued_script_modules();
$this->assertCount( 1, $enqueued_script_modules );
$this->assertTrue( isset( $enqueued_script_modules['foo'] ) );

$this->script_modules->enqueue( 'bar' );

$enqueued_script_modules = $this->get_enqueued_script_modules();
$this->assertCount( 1, $enqueued_script_modules );
$this->assertTrue( isset( $enqueued_script_modules['bar'] ) );

$enqueued_script_modules = $this->get_enqueued_script_modules();
$this->assertCount( 0, $enqueued_script_modules );
}

/**
* Tests that it can print the preloaded script modules multiple times, and it
* will only print the script modules that have not been printed before.
*
* @ticket 56313
*
* @covers ::register()
* @covers ::enqueue()
* @covers ::print_script_module_preloads()
*/
public function test_print_preloaded_script_modules_can_be_called_multiple_times() {
$this->script_modules->register( 'foo', '/foo.js', array( 'static-dep-1', 'static-dep-2' ) );
$this->script_modules->register( 'bar', '/bar.js', array( 'static-dep-3' ) );
$this->script_modules->register( 'static-dep-1', '/static-dep-1.js' );
$this->script_modules->register( 'static-dep-3', '/static-dep-3.js' );
$this->script_modules->enqueue( 'foo' );

$preloaded_script_modules = $this->get_preloaded_script_modules();
$this->assertCount( 1, $preloaded_script_modules );
$this->assertTrue( isset( $preloaded_script_modules['static-dep-1'] ) );

$this->script_modules->register( 'static-dep-2', '/static-dep-2.js' );
$this->script_modules->enqueue( 'bar' );

$preloaded_script_modules = $this->get_preloaded_script_modules();
$this->assertCount( 2, $preloaded_script_modules );
$this->assertTrue( isset( $preloaded_script_modules['static-dep-2'] ) );
$this->assertTrue( isset( $preloaded_script_modules['static-dep-3'] ) );

$preloaded_script_modules = $this->get_preloaded_script_modules();
$this->assertCount( 0, $preloaded_script_modules );
}

/**
* Tests that a script module is not registered when calling enqueue without a
* valid src.
Expand Down

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