data() {        return {            instance: null,            isZoomOpen: false        };    },

　　mounted() {        const that = this;        this.isZoom();        window.addEventListener("resize", function() {            that.isZoom();        });    },

　　methods: {        // 浏览器缩放提示 （打开控制台会影响准确度）        detectZoom: function() {            let ratio = 0,                screen = window.screen,                ua = navigator.userAgent.toLowerCase();            //            if (~ua.indexOf("firefox")) {                if (window.devicePixelRatio !== undefined) {                    ratio = window.devicePixelRatio;                }            } else if (~ua.indexOf("msie")) {                if (screen.deviceXDPI && screen.logicalXDPI) {                    ratio = screen.deviceXDPI / screen.logicalXDPI;                }            } else if (                window.outerWidth !== undefined &&                window.innerWidth !== undefined            ) {                ratio = window.outerWidth / window.innerWidth;            }            //            if (ratio) {                ratio = Math.round(ratio * 100);            }            // 360安全浏览器下的innerWidth包含了侧边栏的宽度            if (ratio !== 100) {                if (ratio >= 95 && ratio <= 105) {                    ratio = 100;                }            }            return ratio;        },        isZoom: function() {            if (this.detectZoom() < 100 || this.detectZoom() > 100) {                this.zoomNotifyOpen();            } else {                this.zoomNotifyClose();            }        },        zoomNotifyOpen: function() {            if (!this.isZoomOpen) {                this.isZoomOpen = true; // 加上标记防止多次提示                this.instance = this.$notify({                    title: "提示",                    message:                        "你的浏览器目前处于缩放状态，页面可能会出现错位现象，建议100%大小显示",                    type: "info",                    duration: 0                });            }        },        zoomNotifyClose: function() {            if (this.instance !== null) {                // 判断是否为null 防止bug                this.instance.close();                this.isZoomOpen = false;            }        }    }