document.createAttribute() 예제
<style>
.hz {
color: red;
}
</style>
<h1>홈짱닷컴 Homzzang.com</h1>
<button onclick="homzzang()">클릭</button>
<script>
function homzzang() {
var h1 = document.getElementsByTagName("H1")[0];
var att = document.createAttribute("class");
att.value = "hz";
h1.setAttributeNode(att);
}
</script>
결과보기