(Return route is undefined) vue closed micro channel browser

Reference: https://blog.csdn.net/KingJin_CSDN_/article/details/77050569

main.js:

Router from Import './router' ; 

router.beforeEach ((to, from, Next) => { 

    const toDepth = to.meta.index; 
    const fromDepth = from.meta.index; 

    IF (to.meta.title) { 
        document.title = to.meta.title; 
    } 

    IF (toDepth == 'undefined' || toDepth == undefined) { 
        the let Notice = '' ;
         IF (fromDepth == 0 ) { 
            Notice = 'Supreme one page, coming off ' ; 
        } the else { 
            Notice =' into the page does not exist, will be shut down '; 
        } 
        Alert (Notice); // must have popups, or it may not be closed 
        // this can turn off the phone Android system 
        document.addEventListener ( 'WeixinJSBridgeReady', function () { 
            WeixinJSBridge.call ( 'closeWindow' ); 
        }, to false );
         // this system can be turned off ios phone 
        WeixinJSBridge.call ( 'closeWindow' );
         // wx.closeWindow (); 
        return ; 
} 

new new Vue ({ 
    EL: '#app' , 
    Router, 
    Components: { 
        the App 
    } , 
    Template:'<App/>'
})