Magento 2 Inline translate for script strings

Question

I had spent more than 3 hours, but did not find solution. If subscribe field on home page empty we will get JS message 'This is a required field.' How it may be translated by inline translate (using book on FE). When I inserted to the table TRANSLATE (by sql) string manually, it's working. So, how show book for inline translation for js popups errors? enter image description here

I try use this in my subscribe.phtml, but this not work correctly (translated data added to DB, but original string "This is a required field." is empty. why?)

<script>
 require([
 'jquery',
 'jquery/ui',
 'mage/translate'
 ], function ($) {
 $(window).load(function () {
 $.mage.__(<?php echo json_encode(__('This is a required field.'))?>);
 });
 });
</script>

enter image description here

Answer 1

I found solution for CSV translates, but not for inline.

1. Add to CSV:

"This is a required field.","This is a required field!!!"

2. Add code to phtml:

<script>
require([
 'jquery',
 'mage/translate'
], function ($) {
 $(window).load(function () {
 var translates = <?php echo \Zend_Json::encode(
 array(
 'This is a required field.' => __('This is a required field.'),
 )
 )?>;
 $.mage.translate.add(translates);
 });
});
</script>