vue js 返回事件的兼容

//返回事件兼容
                fanhui: function() {
                    var browser = {
                        versions: function() {
                            var a = navigator.userAgent,
                                b = navigator.appVersion;
                            return {
                                trident: a.indexOf("Trident") > -1,
                                presto: a.indexOf("Presto") > -1,
                                webKit: a.indexOf("AppleWebKit") > -1,
                                gecko: a.indexOf("Gecko") > -1 && a.indexOf("KHTML") == -1,
                                mobile: !!a.match(/AppleWebKit.*Mobile.*/),
                                ios: !!a.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/),
                                android: a.indexOf("Android") > -1 || a.indexOf("Linux") > -1,
                                iPhone: a.indexOf("iPhone") > -1,
                                iPad: a.indexOf("iPad") > -1,
                                webApp: a.indexOf("Safari") == -1
                            }
                        }(),
                        language: (navigator.browserLanguage || navigator.language).toLowerCase()
                    };
                    if (browser.versions.android) {
                        //Android
                        window.Android.webFinish()
                        //                        window.JsToNative.webFinish();
                    } else if (browser.versions.ios) {
                        window.webkit.messageHandlers.backClick.postMessage(null)
                    }
                }