Route guard minangka fungsi sing ngontrol apa navigasi menyang/saka rute iku diidini. Dhéwé dijalankan sadurungé rute aktif (utawa sadurungé sampeyan ninggal), ngaktifake pamrikse autentikasi, kontrol ijin, lan prompt "owah-owahaning unsaved".
Jenis-jenis guard
CanActivate → can the user enter this route? (auth/permission check)
CanActivateChild → same, for child routes
CanDeactivate → can the user LEAVE? ("you have unsaved changes")
CanMatch → should this route even be matched? (feature flags, role-based)
resolve → pre-fetch data BEFORE the route activates
