[wp-trac] [WordPress Trac] #45320: Allow preloading the translations in `load_script_textdomain`

[WordPress Trac]

#45320: Allow preloading the translations in `load_script_textdomain`
-----------------------------+-----------------------------
 Reporter:  strategio        |      Owner:  (none)
     Type:  feature request  |     Status:  new
 Priority:  normal           |  Milestone:  Awaiting Review
Component:  I18N             |    Version:  5.0
 Severity:  critical         |   Keywords:
  Focuses:                   |
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 **Problem:**

 Now that we can translate strings on the JS side and with the introduction
 of `wp_set_script_translations`, we have no way to override the
 translations coming from the JSON files.

 We need a filter allowing to delegate the process of loading the
 translations.


 **Suggestion:**

 Ideally, we could have a filter inside `load_script_textdomain` where we
 could provide our own set of translations (as a JED object).

 Here's an idea:

 {{{#!php
 <?php

 function load_script_textdomain( $handle, $domain, $path = null ) {
         global $wp_scripts;

         $json_translations = apply_filters( 'pre_load_script_textdomain',
 false, $handle, $domain, $path );

         if ( $json_translations ) {
                 return $json_translations;
         }

         //...
 }
 }}}


 **Why we need it:**

 In WPML, we store the string translations in the DB and we offer the user
 the ability to add/edit translations. Apart overwriting the JSON files
 (which could be an option, but would also introduce other issues), we have
 no way to provide our own translations to the JS script.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/45320>
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