Detect Back Button in Navigation Guards of Vue-Router

问题

How the route is changed, matters for my case. So, I want to catch when the route is changed by a back button of browser or gsm.

This is what I have:

router.beforeEach((to, from, next) => {
  if ( /* IsItABackButton && */ from.meta.someLogica) {
    next(false) 
    return ''
  }
  next()
})

Is there some built-in solutions that I can use instead of IsItABackButton comment? Vue-router itself hasn't I guess but any workaround could also work here. Or would there be another way preferred to recognize it?

回答1:

This is the only way that I've found:

We can listen for popstate, save it in a variable, and then check that variable

// This listener will execute before router.beforeEach only if registered
// before vue-router is registered with Vue.use(VueRouter)

window.popStateDetected = false
window.addEventListener('popstate', () => {
  window.popStateDetected = true
})


router.beforeEach((to, from, next) => {
  const IsItABackButton = window.popStateDetected
  window.popStateDetected = false
  if (IsItABackButton && from.meta.someLogica) {
    next(false) 
    return ''
  }
  next()
})

来源：https://stackoverflow.com/questions/51980296/detect-back-button-in-navigation-guards-of-vue-router