Print a specific content of body

How to use print functaion?

  // 1. buttonNameSelectAsCssHere
  // 2. printAreaIdNameHere

  const printBtn = document.querySelector("buttonNameAsCssHere");
  printBtn.addEventListener("click", function () {
    printArea("printAreaIdNameHere");
	window.location.reload();
  });

  function printArea(areaId) {
    var printContents = document.getElementById(areaId).innerHTML;
    var originalContents = document.body.innerHTML;
    document.body.innerHTML = printContents;
    window.print();
    document.body.innerHTML = originalContents;
  }
};

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