Ajax request code to list the activities of the units related to the event

request-ajax-list-activities.js

const url = wp.ajaxurl; // Sua URL de solicitação
    const urlComParametros = `${url}?action=listActivities&slug=${slug}&level=${level}&school=${school}&timestamp=${new Date().getTime()}`;

    const updateActivities = (slug, level, school) => {
      fetch(urlComParametros, {
        method: 'POST',
        credentials: 'same-origin',
        headers: {
          'Content-Type': 'application/x-www-form-urlencoded',
          'Cache-Control': 'no-cache',
        },
        body: new URLSearchParams({
          action: 'listActivities',
          slug: slug,
          level: level,
          school: school,
        }),
      })
        .then((response) => response.text())
        .then((data) => {
          document.querySelector('#listActivities').innerHTML = data;
          sortPostsByDateTime();
        })
        .catch((error) => {
          console.log(error);
        });
    };


    const slug = document.location.pathname.split('/')[2];
    const level = document.querySelector('article.events').getAttribute('class').split(' ')[0];
    const schoolFilter = document.querySelector('#filterSchool');

    if (schoolFilter) {
      schoolFilter.addEventListener('change', function () {
        const selectedSchool = this.value;
        updateActivities(slug, level, selectedSchool);
      });
    }

    sortPostsByDateTime();
  }
});