{
path: '/trade',
component: Trade,
meta: { showFooter: true },
beforeEnter: (to, from, next) => {
if(from.path == '/shopcart') {
next()
} else {
next(false)
}
}
},
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路由独享守卫，表示如果要去trade页的话，只有从shopcart页才能去，否则从哪个页想跳转到trade页，就回到那个初始页