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vue routing global guard beforeEach and afterEach

 Global routing front guard (beforeEach) This function is used the most. Its function is to perform permission-related verification before routing jumps. This function contains three parameters: to: the object of the target route that is about to enter; from: the route that the current route is leaving; next: confirm the release. It can be used to log in and register, to determine whether there is a token before logging in, and release if it exists. , if it does not exist, it will not be released. The post routing guard (afterEach), its role is to trigger after the routing jump.

Instructions for use

router.beforeEach((to,from,next)=>{
    console.log("666")
    console.log("to",to)
    console.log("from",from)
//    /*  let reg=/\/h\/*/g

    if(to.path==="/aaa/bbb"||to.path==="/aaa/ccc"){
        if(localStorage.getItem("token")==="hello"){
            next()
        }
    }
    else{
        next()
    }
})
router.afterEach((to,from)=>{
    document.title=to.meta.title||"Vue666"
})

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