> For the complete documentation index, see [llms.txt](https://bharat-tiwari.gitbook.io/our-tech-journal/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bharat-tiwari.gitbook.io/our-tech-journal/angular-4/route-guards.md). # Route Guards Route Guards are essentially Angular services (i.e. classes with @injectable decorator) that you can define and use to control user's access to some routes i.e. to allow or deny a user from navigating to some routes. A Route Guard Service Class need to implement one of the following 4 interfaces: | | | | ------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | 1. CanActivate | To control access to some route | | 2. CanActivateChild | To control access to children of a route | | 3. CanLoad | to control loading of some lazy-loaded module | | 4. CanDeactivate | to control if user can leave a route. This can be used to prevent user from accidentally moving to some other part of the app without saving changes in the current view/page. | How to implement Route Guards -