<input id="taokouling"  value="€1222€">

<button class="btn" data-clipboard-action="copy" data-clipboard-target="#taokouling" >复制淘口令</button>

        document.querySelector('.btn').addEventListener('click', () => {

            var clipboard = new Clipboard('.btn');

            clipboard.on('success', e => {

                // alert(e.text)

                $(".pop").fadeIn(500)

                e.clearSelection();

            })

            clipboard.on('error', e => {

                // 不支持复制

                // alert('浏览器不支持自动复制，请手动复制微信号')

                var btn = document.querySelector('.btn');

                btn.addEventListener('click', () => {

                    var input = document.createElement('input');

                    input.setAttribute('readonly', 'readonly');

                    input.setAttribute('value', '€Up2jba6wlck€');

                    document.body.appendChild(input);

                    input.setSelectionRange(0, 9999);

                    if (document.execCommand('copy')) {

                        document.execCommand('copy');

                        $(".pop").fadeIn(500)

                    }

                    else{

                        alert('复制失败');

                    }

                    document.body.removeChild(input);

                })

            })

        })