약간간단 주소복사 버튼

<div id="urlDiv"><button type="button" style="cursor:pointer" onclick="urlCopy()">주소복사</button></div>
<script>
function urlCopy() {
    urlDivHtml = urlDiv.innerHTML;
    urlDiv.innerHTML = urlDivHtml + "<textarea>" + location.href + "</textarea>"; 
    urlDiv.querySelector("textarea").select();
    document.execCommand("copy");
    urlDiv.innerHTML = urlDivHtml; 
    alert("주소가 복사되었습니다");
}
</script>