const box = document.getElementById("box");

if (box) {
  const mobileWidthMediaQuery = window.matchMedia("(max-width: 992px)");

  function printLog(isMobileSize: boolean) {
    const size = isMobileSize ? "уже или равен" : "шире";

    if (box) box.innerText = 'Размер экрана ' + size + ' 992px';
  }

  printLog(mobileWidthMediaQuery.matches);

  mobileWidthMediaQuery.addEventListener("change", function (event) {
    printLog(event.matches);
  });
}