router---Route guard

One, guard parameters

1, the route that to will enter2. From the route that the current navigation is about to leave3. next means release. It must be strictly ensured that this method is called at least once in use, and it is very easy to cause an infinite loop.The parameter of the next method can be a path string or an objectpath string:routes:[{path: '/test'}]either next('test') or next('/test')Object:next({name: 'detail'})next({path: '/detail'})Common scenarios:Replace the current route as follows---beforeEach (to, from, next) {if (to.name === 'detail') {next()next({...to, replace: true})}}

Second, global guard

Three, route exclusive guard

Four, component guards

V. Navigation analysis process