8 * Select the language code of an imported file based on its filename.
10 * This only works if the file name ends with "LANGCODE.po".
12 * @type {Drupal~behavior}
14 * @prop {Drupal~behaviorAttach} attach
15 * Attaches behavior for preselecting language code based on filename.
17 Drupal.behaviors.importLanguageCodeSelector = {
18 attach(context, settings) {
19 const $form = $('#locale-translate-import-form').once('autodetect-lang');
21 const $langcode = $form.find('.langcode-input');
22 $form.find('.file-import-input').on('change', function() {
23 // If the filename is fully the language code or the filename
24 // ends with a language code, pre-select that one.
25 const matches = $(this)
27 .match(/([^.][.]*)([\w-]+)\.po$/);
30 $langcode.find(`option[value="${matches[2]}"]`).length
32 $langcode.val(matches[2]);