use more correct algo for activated components

Author: yyx990803

src/entry-client.js

@@ -40,7 +40,10 @@ router.onReady(() => {
  router.beforeResolve((to, from, next) => {
  const matched = router.getMatchedComponents(to)
  const prevMatched = router.getMatchedComponents(from)
- const activated = matched.filter(c => prevMatched.indexOf(c) < 0)
+ let diffed = false
+ const activated = matched.filter((c, i) => {
+ return diffed || (diffed = (prevMatched[i] !== c))
+ })
  if (!activated.length) {
  return next()
  }