copy2

HTML

<p id="selector">复制士大夫撒范德萨发散我</p>
<button onclick="copyToClipboard('selector')">copy</button><br /><br />
<input type="text" placeholder="粘贴检验" />

JavaScript

function copyToClipboard(eleId){
	var copyDOM = document.getElementById(eleId);  
  	var range = document.createRange();
    range.selectNode(copyDOM);
  	window.getSelection().addRange(range);
	document.execCommand('copy');
 	window.getSelection().removeAllRanges(); 
}