I'm trying to detect when the page location changes in a react app using the Xamarin forms webview .Navigated event. However, it seems like it's only issued when I navigate to an external page, not within the react app, even though I'm using react router. In my browser, the url changes but the Xamarin webview doesn't register that change, even if I manually poll the url by printing webView.Source.
Is there some way I can detect a navigation within the react app from C#?
If you want a component to be location aware, you can wrap it with the HoC withRouter provided by React Router.
You can get access to the history object’s properties and the closest <Route>'s match via the withRouter higher-order component. withRouter will re-render its component every time the route changes with the same props as render props: { match, location, history }.
Once you're getting location change updates in your react app you can update your C# to perform any actions you require.
EDIT: To address your comment...
Now I've never used C#, but according to my research this should work.... take a look at __doPostBack. You can read about how to use it here.
Related
I'm building up a website using ReactJS, REdux,React-Router.I want to access the data upon a different Route i.e for search functionality but I'm unable to do so. I'm only able to access data upon same page.
My App Component
Home Component
I'm dispatching the Action from SearchComponent to store.
I want to access data on /Search Route but unable to do so.
You should point to the component in route element.
Add the component attribute to the route element, pointing towards the component that it should use when hitting the search route.
Remember to import the component first.
So I'm using React Router v4 on my universal application.
I use StaticRouter for SSR and regular Router for browser.
I create history with browserHistory and pass it over to the router.
So, when I run the application through local port (localhost:8081) the react-router-dom <Link> elements works fine.
The problem is when I try to access the page via a custom local domain which is governed by nginx. I have a reverse proxy there and the redirect itself works fine - when I access a homepage or any other /page, it renders the page just fine.
The problem is that neither the <Link> component and .push functions don't work. They just update the URL but the view isn't re-rendering.
I've read about update blocking, but I don't have any PureComponents that could block the render. Also, it's mindboggling because it seems to work fine when running on localhost:8081.
Am I missing something obvious?
Thank you for all the answers
Try using passing { pure: false } as 4th argument to you connects to see if this makes any change. See troubleshooting section.
In older versions I could use setRouteLeaveHook within my component.
For example (SO): Detecting user leaving page
With react router v4 the logic has changed away from injecting the router itself into the components and I only found the following function on router v4:
BrowserRouter. getUserConfirmation
I am a little bit confused, why I should link the confirm behavior with the Router itself and not with a specific component!?
How can I place a confirm window, when leaving my component (linked to my current route), while being in a certain state? This seems to be not supported by the function above.
I think the Prompt component is what you're looking for. Just render it in the component you want to confirm navigation form, i.e. the same component you render in your <Route>.
react-router-navigation-prompt also does what you want: it is a more powerful <Prompt />.
In the React-Router documentation I have seen that It has import both Route and Router modules from react-router-dom. I would like to know what is the different between those two modules?
Router
Router component is what makes the connection between browser location and the react application. It doesn't render anything visible on your page. It just exposes API to interact with location changes of the browser via React context. So any component down the tree can use this API to change their behavior based on location changes in the browser or change the browser location into what they want.
Router is the abstract for all other specific router components. Practically, we use a specific implementation of it like BrowserRouter, MemoryRouter, and HashRouter which use different methods to manage browser history. Also, Router is usually a top-level component in the component tree and use only one time in the entire application. All other react-router components should be descendants of Router as they can't function without the API which Router provides.
Route
Route is much simple to explain. It just renders some UI when a location matches the route’s path. So an application can have many Routes based on its layout complexity in different levels of the component tree. Also, Route has some additional props to configure how the match should happen. Route internally use API provided by Router to access the location and decide whether to render the given component or not.
Any quick-and-easy answer to the scenario where you want to build something like a simple questionnaire with React and React Router where you don't want the user to be able to modify the URL to browse anywhere and you also don't want to push history state into the browser, essentially preventing use of the back button?
Sample routes might look like:
questions/1
questions/2
questions/3
...so on
But the URL should stay the same at all times and the history won't change, essentially what a single page app without routing would behave like.
For the history part, you would need to use replaceWith() everywhere you want to change route.
If you're using <Link>, you could create your own version which uses replaceWith instead of transitionTo - you should just be able to copy its implementation and replace the PropTypes require call with require('react-router/lib/PropTypes').
I can't immediately think of a non-horrible way to prevent the user from jumping around though - presumably you also want the app to break if they try to start on anything but the base URL? I would just use some simple state to control which component is currently being rendered instead of using React Router if that's the behaviour you really want.