vue组件重置rem的size

 export default {
        name: 'ranking-list',
        data(){
            return {
                 clientWidth: document.body.clientWidth
                  };
        },
        created() {
            let html = document.documentElement;
            html.style.fontSize = 100 * (html.clientWidth / 750) + 'px';
        },
        mounted(){
            this.clientWidth = document.body.clientHeight;
            // 监听 window 的 resize 事件．在浏览器窗口变化时再设置下区域高度．
            window.onresize = () => {
                this.clientWidth = document.body.clientHeight;
                let html = document.documentElement;
                html.style.fontSize = 100 * (html.clientWidth / 750) + 'px';
            };
        },
}