复制文本框中值到剪切板

$(".mui-btn-block").click(function(){
    $(".sl").val( $(".sl").val());//这里可以获取动态数据赋值给$("#hide").val()
    $(".sl").select();
    try {var state = document.execCommand("copy");}
    catch(err){var state = false;}
    if(state){
        alert("复制成功")
    }else{
        alert("复制失败")
    }
})

<input type="text"  readonly="readonly" class="sl" style="color:#666666" placeholder="连接"  value="http://www.baidu.com/index.php?pdid=adwadasdasdjasdasdasdasasasSASASDF5S5DFV4SD1">
<button type="button" class="mui-btn mui-btn-primary mui-btn-block" style="margin:0 auto;background:#2571ff;border:1px solid #2571ff">点击复制邀请连接</button>