button 클릭 시 텍스트 복사

<a id="address">주소 들어가는 부분</a>
<button id="btn_a_copy">주소 복사</button>

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<script type="text/javascript">

document.getElementById('btn_a_copy').onclick = function() {
    this.textContent = '복사완료';
    const valOfDIV = document.getElementById("address").innerText;

    const textArea = document.createElement('textarea');

    document.body.appendChild(textArea);

    textArea.value = valOfDIV;

    textArea.select();
    document.execCommand('copy');

    document.body.removeChild(textArea);
}
</script>

---

<script type="text/javascript">

document.getElementById('btn_a_copy').onclick = function() {
    alert('복사되었습니다.');
    const valOfDIV = document.getElementById("address").innerText;

    const textArea = document.createElement('textarea');

    document.body.appendChild(textArea);

    textArea.value = valOfDIV;

    textArea.select();
    document.execCommand('copy');

    document.body.removeChild(textArea);
}
</script>