router.beforeEach((to, from, next)
时间: 2023-11-07 10:35:22 浏览: 28
This is a function in Vue Router that is called before each navigation. It takes three parameters:
1. `to`: the target Route Object being navigated to.
2. `from`: the current Route Object that is being navigated away from.
3. `next`: a callback function that must be called to resolve the navigation.
The `beforeEach` function is used to implement global navigation guards for the router. It allows you to intercept each navigation and perform some action before allowing the navigation to proceed. For example, you could use it to check if the user is authenticated and redirect them to a login page if they are not. You can also use it to modify the destination route or cancel the navigation altogether.