React native web scraping submit form - react-native

I`m trying to set up a little React Native App. The app should have a login screen, after a successful login you go to the next screen where a pdf gets displayed.
The pdf is from a website. So I have to log in on the website (with the data from the login screen) and fill in that form, submit it and finally, I can reach that pdf I want.
Is there a way, like a library or a framework/tool or whatever to achieve that form submit?

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how to fix, blank page when trying to use history push in react native

I am working on a APP, where I created a button that navigates you to other page. I imported react native router and use history from react-router dom.
I created seperated folder with login routs (when user is on login screen he can move to sign-up)
Loginrouts.js :
than I created login.js where the button is, it uses useHistory.push() and it calls signup from loginroute.js
But when button is pressed it only shows blank screen, anyone knows why?

The default out-of-the box template for Blazor doesn't work on mobile

If I create a new Blazor application (Server-side or WASM), the default template that is provided with the Counter and Fetch Data menu items doesn't work properly on a mobile device. It run's ok on a desktop browser. Is there something setup incorrectly?
On the mobile, the menu never opens. The hamburger Menu button cannot be tapped. Apart from that, if you manage to navigate by URL to another page, the page keep loading without giving any error.

Not able to open Attachments in Salesforce Lightning Chatter page iOS webview

All,
We are building a custom mobile app based on salesforce services in React native, As chatter functionality is huge we are loading the chatter lightning page in a Webview using "react-native-wkwebview-reborn".
Below is the URL used to load the Chatter page.
${APIUrls.SALESFORCE_HOST_URL}/secur/frontdoor.jsp?sid=${decodeURIComponent(this.props.accessToken)}&retURL=${encodeURIComponent(returnURL)}
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The same functionality working perfectly in Andriod.
Any one suggest the reason for this.

How to get response back from Chrome Custom Tabs in react-native

I want to get response from URL that is opened into chrome custom tab. actually i have some forms in external url that is submitted and return data array on success page. I want to get array into my app. when user click on button custom tab will open and submit required fields and goes into success page. I want to do custom tab will be close automatically and fetch array into app and want to create success page into app.

Link to page when logging in to Facebook in xcode

So I've got my iPhone app running and what I want to achieve is when you navigate to a certain page, there is a button which, when clicked, will direct you to a certain page on Facebook. I have looked at the Facebook development pages (http://developers.facebook.com/docs/guides/mobile/) for adding Facebook and it is currently opening up Facebook when clicked and logs in successfully, although not straight away like it should.
So my problems are as follows:
1) When the button is pressed, it should bring up a page asking for permission for my application to automatically log in but it doesn't,
2) When logged in, I want the app to take the user straight to a specific page on Facebook so they can look at it and like it but i have no idea how to do this,
3) I would also need a way of exiting the Facebook view, back to the previous view the user was on inside my application.
Thanks,
Matthew