给vue-cli项目中的body添加样式（为body绑定cals

<script>
    export default {
        beforeCreate: function() {
            document.getElementsByTagName("body")[0].className="bgColor";
        },
        beforeDestroy: function() {
            document.body.removeAttribute("class","bgColor");
        }
    } 
</script>

然后给’‘bgColor’'添加对应的背景颜色就ok了