NavigationEasy20 XP2 min read
How do you return a result from a pushed route?
TL;DR: Navigator.push returns a Future. Call Navigator.pop(context, result) on the child route to complete the Future with a value. In go_router, context.pop(result) does the same.
Full Answer
A common pattern is opening a selection screen and using the result on return. Navigator.push<T>() returns Future<T?>, which resolves when the route is popped with a value.
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Always handle the null case — the user may press the back button without selecting anything, returning null.
Code Examples
dartReturning a result from a route
Output
Tapping 'Blue' in ColorPickerScreen returns Colors.blue to the caller; selected color is updated
Common Mistakes
- ✗Not awaiting Navigator.push — the result Future is never read
- ✗Using go_router's context.go() instead of context.push() — go() doesn't support result return
Interview Tip
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This is a common interview coding question. Showing you handle the null (back button) case demonstrates attention to edge cases.
#Navigator#pop-result#context.pop#go_router