JS 點選複製當前URL地址

$('#copy').on('click', function () {
    var url = window.location.href;
    copyUrl(url);
    alert("複製成功！");
});

function copyUrl(id) {
    $("body").after("<input id='copyVal'></input>");
    var text = id;
    var input = document.getElementById("copyVal");
    input.value = text;
    input.select();
    input.setSelectionRange(0, input.value.length);   
    document.execCommand("copy");
    $("#copyVal").remove();
}