hometown/app/javascript/packs/public.js

import { length } from 'stringz';
import IntlRelativeFormat from 'intl-relativeformat';
import { delegate } from 'rails-ujs';
import emojify from '../mastodon/emoji';
import { getLocale } from '../mastodon/locales';
import loadPolyfills from '../mastodon/load_polyfills';

require.context('../images/', true);

const { localeData } = getLocale();
localeData.forEach(IntlRelativeFormat.__addLocaleData);

function loaded() {
  const locale = document.documentElement.lang;
  const dateTimeFormat = new Intl.DateTimeFormat(locale, {
    year: 'numeric',
    month: 'long',
    day: 'numeric',
    hour: 'numeric',
    minute: 'numeric',
  });
  const relativeFormat = new IntlRelativeFormat(locale);

  [].forEach.call(document.querySelectorAll('.emojify'), (content) => {
    content.innerHTML = emojify(content.innerHTML);
  });

  [].forEach.call(document.querySelectorAll('time.formatted'), (content) => {
    const datetime = new Date(content.getAttribute('datetime'));
    const formattedDate = dateTimeFormat.format(datetime);
    content.title = formattedDate;
    content.textContent = formattedDate;
  });

  [].forEach.call(document.querySelectorAll('time.time-ago'), (content) => {
    const datetime = new Date(content.getAttribute('datetime'));
    content.textContent = relativeFormat.format(datetime);;
  });
}

function main() {
  if (['interactive', 'complete'].includes(document.readyState)) {
    loaded();
  } else {
    document.addEventListener('DOMContentLoaded', loaded);
  }

  delegate(document, '.video-player video', 'click', ({ target }) => {
    if (target.paused) {
      target.play();
    } else {
      target.pause();
    }
  });

  delegate(document, '.media-spoiler', 'click', ({ target }) => {
    target.style.display = 'none';
  });

  delegate(document, '.webapp-btn', 'click', ({ target, button }) => {
    if (button !== 0) {
      return true;
    }
    window.location.href = target.href;
    return false;
  });

  delegate(document, '.status__content__spoiler-link', 'click', ({ target }) => {
    const contentEl = target.parentNode.parentNode.querySelector('.e-content');
    if (contentEl.style.display === 'block') {
      contentEl.style.display = 'none';
      target.parentNode.style.marginBottom = 0;
    } else {
      contentEl.style.display = 'block';
      target.parentNode.style.marginBottom = null;
    }
    return false;
  });

  delegate(document, '.account_display_name', 'input', ({ target }) => {
    const nameCounter = document.querySelector('.name-counter');
    if (nameCounter) {
      nameCounter.textContent = 30 - length(target.value);
    }
  });

  delegate(document, '.account_note', 'input', ({ target }) => {
    const noteCounter = document.querySelector('.note-counter');
    if (noteCounter) {
      noteCounter.textContent = 160 - length(target.value);
    }
  });
}

loadPolyfills().then(main).catch(error => {
  console.error(error);
});