app/assets/javascripts/pages/admin/broadcast_messages/broadcast_message.js


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import $ from 'jquery';
import _ from 'underscore';
import axios from '~/lib/utils/axios_utils';
import flash from '~/flash';
import { __ } from '~/locale';

export default () => {
  $('input#broadcast_message_color').on('input', function onMessageColorInput() {
    const previewColor = $(this).val();
    $('div.broadcast-message-preview').css('background-color', previewColor);
  });

  $('input#broadcast_message_font').on('input', function onMessageFontInput() {
    const previewColor = $(this).val();
    $('div.broadcast-message-preview').css('color', previewColor);
  });

  const previewPath = $('textarea#broadcast_message_message').data('previewPath');

  $('textarea#broadcast_message_message').on(
    'input',
    _.debounce(function onMessageInput() {
      const message = $(this).val();
      if (message === '') {
        $('.js-broadcast-message-preview').text(__('Your message here'));
      } else {
        axios
          .post(previewPath, {
            broadcast_message: {
              message,
            },
          })
          .then(({ data }) => {
            $('.js-broadcast-message-preview').html(data.message);
          })
          .catch(() => flash(__('An error occurred while rendering preview broadcast message')));
      }
    }, 250),
  );
};