h5中用css设置网页内容禁止复制选中、复制

.icon {     -webkit-touch-callout: none; /* iOS Safari */     
-webkit-user-select: none; /* Chrome/Safari/Opera */    
 -khtml-user-select: none; /* Konqueror */    
 -moz-user-select: none; /* Firefox */     
-ms-user-select: none; /* Internet Explorer/Edge */    
 user-select: none; /* Non-prefixed version, currently not supported by any browser */ }