[wp-trac] [WordPress Trac] #45425: Add a filter to the translation file location for script localisation

[WordPress Trac]

#45425: Add a filter to the translation file location for script localisation
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 Reporter:  johnbillion   |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  5.0
Component:  I18N          |    Version:  5.0
 Severity:  normal        |   Keywords:
  Focuses:  javascript    |
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 In [43825] (#45103), the `load_script_textdomain()` function was
 introduced as part of the changes that allow JavaScript files to register
 and use translated strings.

 This function doesn't pass its return value through a filter, which means
 it's not possible to override the paths used for translation files, nor is
 it possible to inspect its behaviour for debugging purposes. The latter is
 particularly noteworthy because this is brand new functionality that
 plugin and theme authors will be attempting to implement, and being able
 to debug what translation files are being loaded is valuable.

 I propose that this function is altered so it operates a little more
 similarly to the existing `load_plugin_textdomain()` and
 `load_textdomain()` functions for gettext translation files.

 cc @omarreiss @herregroen

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Ticket URL: <https://core.trac.wordpress.org/ticket/45425>
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