利用element显示Notification通知，复制提醒，禁用F12或右键菜单提醒

<!-- 引入VUE -->
<script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.min.js"></script>
<!-- 引入组件库 -->
<script src="https://cdn.jsdelivr.net/npm/element-ui@2.15.6/lib/index.js"></script>
<!-- 引入样式 -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/element-ui@2.15.6/packages/theme-chalk/lib/index.css">

<!-- 引入VUE -->
<script src="https://unpkg.com/vue@2.6.14/dist/vue.js"></script>
<!-- 引入组件库 -->
<script src="https://unpkg.com/element-ui@2.15.6/lib/index.js"></script>
<!-- 引入样式 -->
<link rel="stylesheet" href="https://unpkg.com/element-ui@2.15.6/lib/theme-chalk/index.css">

/* 复制提醒 */
document.addEventListener("copy",function(e){
    new Vue({
        data:function(){
            this.$notify({
                title:"嘿！复制成功",
                message:"若要转载请务必保留原文链接！爱你呦~",
                position: 'bottom-right',
                offset: 50,
                showClose: false,
                type:"success"
            });
            return{visible:false}
        }
    })
})

/* 禁用F12按键并提醒 */
document.onkeydown = function () {
if (window.event && window.event.keyCode == 123) {
  event.keyCode = 0;
  event.returnValue = false;
    new Vue({
            data:function(){
                this.$notify({
                    title:"嘿！别瞎按",
                    message:"坏孩子！",
                    position: 'bottom-right',
                    offset: 50,
                    showClose: false,
                    type:"error"
                });
                return{visible:false}
            }
        })
  return false;
}
};

/* 禁用右键菜单并提醒 */
document.oncontextmenu = function () {
new Vue({
    data:function(){
        this.$notify({
            title:"嘿！没有右键菜单",
            message:"复制请用键盘快捷键",
            position: 'bottom-right',
            offset: 50,
            showClose: false,
            type:"warning"
        });
        return{visible:false}
    }
})
return false;
}

//禁用左键选择
      document.onselectstart = function () {
        return false;
      }

//禁用复制
      document.oncopy = function () {
        return false;
     }

//禁用Ctrl+Shift+I
        if ((event.ctrlKey) && (event.shiftKey) && (event.keyCode == 73)) {
          return false;
        }