rsnext/errors/popstate-state-empty.md

# `popstate` called with empty state

#### Why This Error Occurred

When using the browser back button the popstate event is triggered. Next.js sets
`popstate` event triggered but `event.state` did not have `url` or `as`, causing a route change failure

#### Possible Ways to Fix It

The only known cause of this issue is manually manipulating `window.history` instead of using `next/router`

### Useful Links

- [The issue this was reported in: #4994](https://github.com/zeit/next.js/issues/4994)
Add warning for broken popstate (#5000) * Add warning for undefined url and as coming from popstate * Use consistent url * Fix err.sh link in test * Rename `inital` => `initial` 2018-08-24 12:30:27 +02:00			# `popstate` called with empty state

			`#### Why This Error Occurred`

Remove trailing spaces (#6547) ### changes #### remove trailing spaces When I was using example I noticed trailing spaces. So, this PR removes the trailing spaces of json file, README, and others. `examples/with-jest-typescript/src/modules/cars/Overview.tsx` also has it, but this time it did not change as tslint error occurs at commit. 2019-03-07 17:40:08 +01:00			`When using the browser back button the popstate event is triggered. Next.js sets`
Add warning for broken popstate (#5000) * Add warning for undefined url and as coming from popstate * Use consistent url * Fix err.sh link in test * Rename `inital` => `initial` 2018-08-24 12:30:27 +02:00			`popstate` event triggered but `event.state` did not have `url` or `as`, causing a route change failure

			`#### Possible Ways to Fix It`

Remove trailing spaces (#6547) ### changes #### remove trailing spaces When I was using example I noticed trailing spaces. So, this PR removes the trailing spaces of json file, README, and others. `examples/with-jest-typescript/src/modules/cars/Overview.tsx` also has it, but this time it did not change as tslint error occurs at commit. 2019-03-07 17:40:08 +01:00			The only known cause of this issue is manually manipulating `window.history` instead of using `next/router`
Add warning for broken popstate (#5000) * Add warning for undefined url and as coming from popstate * Use consistent url * Fix err.sh link in test * Rename `inital` => `initial` 2018-08-24 12:30:27 +02:00
			`### Useful Links`

			`- [The issue this was reported in: #4994](https://github.com/zeit/next.js/issues/4994)`