1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
|
<?php
/**
* Script Modules API: WP_Script_Modules class.
*
* Native support for ES Modules and Import Maps.
*
* @package WordPress
* @subpackage Script Modules
*/
/**
* Core class used to register script modules.
*
* @since 6.5.0
*/
class WP_Script_Modules {
/**
* Holds the registered script modules, keyed by script module identifier.
*
* @since 6.5.0
* @var array
*/
private $registered = array();
/**
* Holds the script module identifiers that were enqueued before registered.
*
* @since 6.5.0
* @var array<string, true>
*/
private $enqueued_before_registered = array();
/**
* Registers the script module if no script module with that script module
* identifier has already been registered.
*
* @since 6.5.0
*
* @param string $id The identifier of the script module. Should be unique. It will be used in the
* final import map.
* @param string $src Optional. Full URL of the script module, or path of the script module relative
* to the WordPress root directory. If it is provided and the script module has
* not been registered yet, it will be registered.
* @param array $deps {
* Optional. List of dependencies.
*
* @type string|array ...$0 {
* An array of script module identifiers of the dependencies of this script
* module. The dependencies can be strings or arrays. If they are arrays,
* they need an `id` key with the script module identifier, and can contain
* an `import` key with either `static` or `dynamic`. By default,
* dependencies that don't contain an `import` key are considered static.
*
* @type string $id The script module identifier.
* @type string $import Optional. Import type. May be either `static` or
* `dynamic`. Defaults to `static`.
* }
* }
* @param string|false|null $version Optional. String specifying the script module version number. Defaults to false.
* It is added to the URL as a query string for cache busting purposes. If $version
* is set to false, the version number is the currently installed WordPress version.
* If $version is set to null, no version is added.
*/
public function register( string $id, string $src, array $deps = array(), $version = false ) {
if ( ! isset( $this->registered[ $id ] ) ) {
$dependencies = array();
foreach ( $deps as $dependency ) {
if ( is_array( $dependency ) ) {
if ( ! isset( $dependency['id'] ) ) {
_doing_it_wrong( __METHOD__, __( 'Missing required id key in entry among dependencies array.' ), '6.5.0' );
continue;
}
$dependencies[] = array(
'id' => $dependency['id'],
'import' => isset( $dependency['import'] ) && 'dynamic' === $dependency['import'] ? 'dynamic' : 'static',
);
} elseif ( is_string( $dependency ) ) {
$dependencies[] = array(
'id' => $dependency,
'import' => 'static',
);
} else {
_doing_it_wrong( __METHOD__, __( 'Entries in dependencies array must be either strings or arrays with an id key.' ), '6.5.0' );
}
}
$this->registered[ $id ] = array(
'src' => $src,
'version' => $version,
'enqueue' => isset( $this->enqueued_before_registered[ $id ] ),
'dependencies' => $dependencies,
);
}
}
/**
* 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.
*
* @since 6.5.0
*
* @param string $id The identifier of the script module. Should be unique. It will be used in the
* final import map.
* @param string $src Optional. Full URL of the script module, or path of the script module relative
* to the WordPress root directory. If it is provided and the script module has
* not been registered yet, it will be registered.
* @param array $deps {
* Optional. List of dependencies.
*
* @type string|array ...$0 {
* An array of script module identifiers of the dependencies of this script
* module. The dependencies can be strings or arrays. If they are arrays,
* they need an `id` key with the script module identifier, and can contain
* an `import` key with either `static` or `dynamic`. By default,
* dependencies that don't contain an `import` key are considered static.
*
* @type string $id The script module identifier.
* @type string $import Optional. Import type. May be either `static` or
* `dynamic`. Defaults to `static`.
* }
* }
* @param string|false|null $version Optional. String specifying the script module version number. Defaults to false.
* It is added to the URL as a query string for cache busting purposes. If $version
* is set to false, the version number is the currently installed WordPress version.
* If $version is set to null, no version is added.
*/
public function enqueue( string $id, string $src = '', array $deps = array(), $version = false ) {
if ( isset( $this->registered[ $id ] ) ) {
$this->registered[ $id ]['enqueue'] = true;
} elseif ( $src ) {
$this->register( $id, $src, $deps, $version );
$this->registered[ $id ]['enqueue'] = true;
} else {
$this->enqueued_before_registered[ $id ] = true;
}
}
/**
* Unmarks the script module so it will no longer be enqueued in the page.
*
* @since 6.5.0
*
* @param string $id The identifier of the script module.
*/
public function dequeue( string $id ) {
if ( isset( $this->registered[ $id ] ) ) {
$this->registered[ $id ]['enqueue'] = false;
}
unset( $this->enqueued_before_registered[ $id ] );
}
/**
* Removes a registered script module.
*
* @since 6.5.0
*
* @param string $id The identifier of the script module.
*/
public function deregister( string $id ) {
unset( $this->registered[ $id ] );
unset( $this->enqueued_before_registered[ $id ] );
}
/**
* Adds the hooks to print the import map, enqueued script modules and script
* module preloads.
*
* 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() {
$position = wp_is_block_theme() ? 'wp_head' : 'wp_footer';
add_action( $position, array( $this, 'print_import_map' ) );
add_action( $position, array( $this, 'print_enqueued_script_modules' ) );
add_action( $position, array( $this, 'print_script_module_preloads' ) );
}
/**
* Prints the enqueued script modules using script tags with type="module"
* attributes.
*
* @since 6.5.0
*/
public function print_enqueued_script_modules() {
foreach ( $this->get_marked_for_enqueue() as $id => $script_module ) {
wp_print_script_tag(
array(
'type' => 'module',
'src' => $this->get_src( $id ),
'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.
*
* @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.
if ( true !== $script_module['enqueue'] ) {
echo sprintf(
'<link rel="modulepreload" href="%s" id="%s">',
esc_url( $this->get_src( $id ) ),
esc_attr( $id . '-js-modulepreload' )
);
}
}
}
/**
* Prints the import map using a script tag with a type="importmap" attribute.
*
* @since 6.5.0
*
* @global WP_Scripts $wp_scripts The WP_Scripts object for printing the polyfill.
*/
public function print_import_map() {
$import_map = $this->get_import_map();
if ( ! empty( $import_map['imports'] ) ) {
global $wp_scripts;
if ( isset( $wp_scripts ) ) {
wp_print_inline_script_tag(
wp_get_script_polyfill(
$wp_scripts,
array(
'HTMLScriptElement.supports && HTMLScriptElement.supports("importmap")' => 'wp-polyfill-importmap',
)
),
array(
'id' => 'wp-load-polyfill-importmap',
)
);
}
wp_print_inline_script_tag(
wp_json_encode( $import_map, JSON_HEX_TAG | JSON_HEX_AMP ),
array(
'type' => 'importmap',
'id' => 'wp-importmap',
)
);
}
}
/**
* Returns the import map array.
*
* @since 6.5.0
*
* @return array Array with an `imports` key mapping to an array of script module identifiers and their respective
* URLs, including the version query.
*/
private function get_import_map(): array {
$imports = array();
foreach ( $this->get_dependencies( array_keys( $this->get_marked_for_enqueue() ) ) as $id => $script_module ) {
$imports[ $id ] = $this->get_src( $id );
}
return array( 'imports' => $imports );
}
/**
* Retrieves the list of script modules marked for enqueue.
*
* @since 6.5.0
*
* @return array Script modules marked for enqueue, keyed by script module identifier.
*/
private function get_marked_for_enqueue(): array {
$enqueued = array();
foreach ( $this->registered as $id => $script_module ) {
if ( true === $script_module['enqueue'] ) {
$enqueued[ $id ] = $script_module;
}
}
return $enqueued;
}
/**
* Retrieves all the dependencies for the given script module identifiers,
* filtered by import types.
*
* It will consolidate an array containing a set of unique dependencies based
* on the requested import types: 'static', 'dynamic', or both. This method is
* recursive and also retrieves dependencies of the dependencies.
*
* @since 6.5.0
*
* @param string[] $ids The identifiers of the script modules for which to gather dependencies.
* @param array $import_types Optional. Import types of dependencies to retrieve: 'static', 'dynamic', or both.
* Default is both.
* @return array List of dependencies, keyed by script module identifier.
*/
private function get_dependencies( array $ids, array $import_types = array( 'static', 'dynamic' ) ) {
return array_reduce(
$ids,
function ( $dependency_script_modules, $id ) use ( $import_types ) {
$dependencies = array();
foreach ( $this->registered[ $id ]['dependencies'] as $dependency ) {
if (
in_array( $dependency['import'], $import_types, true ) &&
isset( $this->registered[ $dependency['id'] ] ) &&
! isset( $dependency_script_modules[ $dependency['id'] ] )
) {
$dependencies[ $dependency['id'] ] = $this->registered[ $dependency['id'] ];
}
}
return array_merge( $dependency_script_modules, $dependencies, $this->get_dependencies( array_keys( $dependencies ), $import_types ) );
},
array()
);
}
/**
* Gets the versioned URL for a script module src.
*
* If $version is set to false, the version number is the currently installed
* WordPress version. If $version is set to null, no version is added.
* Otherwise, the string passed in $version is used.
*
* @since 6.5.0
*
* @param string $id The script module identifier.
* @return string The script module src with a version if relevant.
*/
private function get_src( string $id ): string {
if ( ! isset( $this->registered[ $id ] ) ) {
return '';
}
$script_module = $this->registered[ $id ];
$src = $script_module['src'];
if ( false === $script_module['version'] ) {
$src = add_query_arg( 'ver', get_bloginfo( 'version' ), $src );
} elseif ( null !== $script_module['version'] ) {
$src = add_query_arg( 'ver', $script_module['version'], $src );
}
/**
* Filters the script module source.
*
* @since 6.5.0
*
* @param string $src Module source url.
* @param string $id Module identifier.
*/
$src = apply_filters( 'script_module_loader_src', $src, $id );
return $src;
}
}
|
