<input type="text" value="复制的文本" class="empInput"  id="empInput">

<button class="Wechat" data-clipboard-action="copy" data-clipboard-target="#empInput">复制</button>

 

var clipboard = new ClipboardJS(".Wechat");

clipboard.on('success', function(e) {

console.log(e);

alert("复制成功");

});

clipboard.on('error', function(e) {

console.error('Action',e.action);

});