document.createComment() 예제
<button onclick="homzzang()">클릭</button>
<p id="demo"></p>
<script>
function homzzang() {
var c = document.createComment("홈짱닷컴 Homzzang.com");
document.body.appendChild(c);
var x = document.getElementById("demo");
x.innerHTML = "소스보기하면 추가한 주석 확인 가능";
}
</script>
결과보기