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Angular News Wednesday, June 6

Why It’s Time to Say Goodbye to Angular Template-Driven Forms

  • Lets compare this with the same form built using reactive forms: – With this approach we can see immediately the structure of our form in a very clean way, without rooting around the template file.
  • Lets compare this with the reactive approach: – We can access the form in our component at any point and we dont need to use template variables to get its values.
  • For example: – Custom validatorWhereas with reactive forms we can use the function directly: – Custom validatorAnother important thing that you should pay attention to is that unlike reactive forms, template-driven forms are asynchronous.
  • Two waybinding – Template-driven forms expose a two-way binding option which breaks the one-way data flow and immutability principles and makes your code bug-prone and hard to reason about.
  • Testability – When using template-driven forms, we must create a component in order to test our forms and use one of the async testing helpers that Angular provides.

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Why It’s Time to Say Goodbye to Angular Template-Driven Forms

Upgrading a project without CLI to Angular 6 – Angular In Depth

  • Upgrading a project without CLI to Angular6 – In the following article, Im going to describe the challenging process of updating the Angular application with custom Webpack configuration, which our team had to pull through 3 weeks ago.
  • In terms of technologies, the project is based on components, directives and Angular modules written in TypeScript.
  • Besides Angular and Webpack update, we also need to upgrade RxJS to the sixth version, otherwise, the project just wouldnt run.
  • @ngtools/webpackofficial tool from Angular DevKit, it is constantly updating and was altered for the sixth version of the framework.
  • But if for some reason this doesnt work out, you can make a small hack by changing the code above to: – Unfortunately, errors didnt stop there and we got another one in the Angular compilation plugin itself: – [0] building modules wds: Project is running at http://localhost:8080/ wds: webpack…

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Upgrading a project without CLI to Angular 6 – Angular In Depth

Open a Webpage in React Native with Linking and WebView

  • Instructor: 00:00 To use a button in your app to open a web page on the device’s web browser, import linking from React Native.
  • 00:31 If you don’t want to open the device’s browser, but instead you want to open a URL without leaving your app, you first need to make a new screen in your application.
  • Also, import web view from React Native, which is what we’ll used to display the web page.
  • Now back where the link is, we can navigate to the new browser screen, and pass the URL to display in the web view to the navigate function.
  • 01:54 When we run the app and press the link, the browser’s screen is pushed on to the navigation’s stack.

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Open a Webpage in React Native with Linking and WebView

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