js点击按钮复制文本到剪切板

//点击复制
<div class="userMenu_number">
    <div class="userMenu_numItem clearfix">
        <div class="userMenu_shareLink fl" id="userShare_code">wearable</div>
        <div class="userLogin_place fl userMenu_copy point" onclick="copyUrl2('userShare_code')">复制</div>
    </div>
</div>
<script>
function copyUrl2(id) {
    var Url2 = document.getElementById(id).innerText;
    var oInput = document.createElement('input');
    oInput.value = Url2;
    document.body.appendChild(oInput);
    oInput.select(); // 选择对象
    document.execCommand("Copy"); // 执行浏览器复制命令
    oInput.className = 'oInput';
    oInput.style.display = 'none';
    alert("复制成功");
}
</script>