Untitled

<!DOCTYPE html>
<html>

  <head lang="en">
    <meta charset="utf-8">
    <title>Custom Plunker</title>
    <script >
      
 function selectionner(element){
  var range;
   if (document.createRange) { 
        range = document.createRange();
  	range.setStartBefore(element);
		range.setEndAfter(element);
		range.selectNode(element);
	}else{
		 range = document.body.createTextRange();
		range.moveToElementText(element);
		range.select()
	}
 }
 
 function copierleContenuElement(element ,tout){
        var rang=selectionner(element);
		if (tout&&window.clipboardData && clipboardData.setData) { 
			window.clipboardData.setData('Text', element.innerHTML); 
	    }else{
		      if(document.execCommand){
					var selection = window.getSelection();
					selection.addRange(rang);
					document.execCommand('Copy');
               } 
				else if(rang.execCommand){
				  rang.execCommand('Copy');
				}
		}
 }
     
	
      
    </script>
  </head>
  
  <body>
    <input onclick="copierleContenuElement(document.getElementById('div'),true)" type="button" 
  value=" Cliquer pour copier dans le press papier" name="copy_button">
  <div id="div">
     <span>
   tessssssssssssssssst
	 </span>
 </div>
    
    
    
    
  </body>
  
</html>