eric eric - 1 year ago 152
React JSX Question

React router - Nested routes not working

My goal is to have http://mydomain/route1 render React component Component1 and http://mydomain/route2 render Component2. So, I thought it's natural to write the routes like the following:

<Route name="route1" handler={Component1}>
<Route name="route2" handler={Component2} />

<DefaultRoute name="home" handler={Home} />

http://mydomain/route1 works as expected but http://mydomain/route2 renders Component1 instead.

Then I read this question and changed the routes to as follows:

<Route name="route1" path="route1" handler={Component1} />
<Route name="route2" path="route1/route2" handler={Component2} />

<DefaultRoute name="home" handler={Home} />

Both http://mydomain/route2 and http://mydomain/route2 work as expected now. However, I don't understand why the former one does not work while it looks more logical and neater to me.

The nested syntax works for "/" and "route1" so why not "route1" and "route2"?

Answer Source

The problem is that in nested routes, the router will try to mount all the components that match the hierarchy. This is best used when you want to nest components inside each other... but if you want two separate routes to match different components, they will need to be their own routes.

<Route handler={App}>
  <Route path="route1" handler={Component1} />
  <Route path="/route1/route2" handler={Component2} />
  <DefaultRoute name="home" handler={Home} />

Component2 will mount (inside of App) when the URL is /route1/route2.

If you wanted to nest the components, you would need to add <RouteHandler/> to Component1 so it would render Component2 inside of it.

The reason this works is because nesting components are not the same as nesting URLs and can be handled separately by the router. Sometimes you want the components to nest but not necessarily the URLs, and vice versa.

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