whippy-edition/app/javascript/packs/admin.js

import { delegate } from 'rails-ujs';

const batchCheckboxClassName = '.batch-checkbox input[type="checkbox"]';

delegate(document, '#batch_checkbox_all', 'change', ({ target }) => {
  [].forEach.call(document.querySelectorAll(batchCheckboxClassName), (content) => {
    content.checked = target.checked;
  });
});

delegate(document, batchCheckboxClassName, 'change', () => {
  const checkAllElement = document.querySelector('#batch_checkbox_all');

  if (checkAllElement) {
    checkAllElement.checked = [].every.call(document.querySelectorAll(batchCheckboxClassName), (content) => content.checked);
    checkAllElement.indeterminate = !checkAllElement.checked && [].some.call(document.querySelectorAll(batchCheckboxClassName), (content) => content.checked);
  }
});

delegate(document, '.media-spoiler-show-button', 'click', () => {
  [].forEach.call(document.querySelectorAll('button.media-spoiler'), (element) => {
    element.click();
  });
});

delegate(document, '.media-spoiler-hide-button', 'click', () => {
  [].forEach.call(document.querySelectorAll('.spoiler-button.spoiler-button--visible button'), (element) => {
    element.click();
  });
});

delegate(document, '#domain_block_severity', 'change', ({ target }) => {
  const rejectMediaDiv   = document.querySelector('.input.with_label.domain_block_reject_media');
  const rejectReportsDiv = document.querySelector('.input.with_label.domain_block_reject_reports');

  if (rejectMediaDiv) {
    rejectMediaDiv.style.display = (target.value === 'suspend') ? 'none' : 'block';
  }

  if (rejectReportsDiv) {
    rejectReportsDiv.style.display = (target.value === 'suspend') ? 'none' : 'block';
  }
});