8. 禁止复制

当页面内容不容许别人复制时候

<div class="className">......</div>

// css部分
.className {
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

html, body {
  -webkit-user-select: none;
  user-select: none;
}

兼容：
.className {
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
}